PARASITE RESISTANCE IN STRAIGHTBRED AND CROSSBRED BARBADOS BLACKBELLY SHEEP 1,2

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "PARASITE RESISTANCE IN STRAIGHTBRED AND CROSSBRED BARBADOS BLACKBELLY SHEEP 1,2"

Transcription

1 PARASITE RESISTANCE IN STRAIGHTBRED AND CROSSBRED BARBADOS BLACKBELLY SHEEP 1,2 Thomas A. Yazwinski 3, L. Goode 4, D. J. Moncol 4, G. W. Morgan 4 and A. C. Linnerud 4 North Carolina State University, Raleigh Summary Resistance to gastrointestinal parasites was studied in a total of 193 sheep with widely different points of origin and genetic backgrounds. Breed groups compared were Dorset (D), Barbados Blackbelly (B) and Dorset x Blackbelly (D B), Dorset X Landrace (D L) and Rambouillet Landrace (R L) crosses. In Exp. I, the sheep were carrying mixed infections of parasites, and D B sheep had lower (P<.05) total fecal egg counts (EPG, eggs/g feces) than the D, D X L and R L groups. Breed differences were not related to ewe hemoglobin type, but were primarily the result of significantly lower egg production by CTO parasites (Cooperia spp, Trichostrongylus spp, Ostertagia spp) in D x B animals. Fecal egg counts for HO parasites (H. contortus, Oesophagostomum spp) did not vary significantly among breed groups. Differences in Nematodirus spp EPG levels were not consistent among trials. In Exp. If, D x B and D ewe and ram lambs with zero EPG levels were administered standard doses of a mixed infection of larvae and maintained on concrete, and showed that breed differences in eggs per gram of feces were the result of less fecund parasites in the digestive tract of D B animals. While numbers of parasites recovered from the digestive tract did not vary significantly, egg production per CTO 1 Paper No of the Journal Series of the North Carolina Agr. Res. Service, Raleigh. 2The use of trade names in this publication does not imply endorsement by the North Carolina AgE Res. Service of the products named, nor criticism of similar ones not mentioned. 3Present address: Dept. of Animal Science, Univ. of Arkansas, Fayetteville Dept. of Animal Science, Veterinary Science, Poultry Science and Experiment Statistics, respeetively. 919 parasite recovered was lower (P<.05) in D B rams and ewes. Eggs per HO parasite were lower (P<.05) in D B ewes, but not in D x B rams. Based on significantly lower EPG levels and higher hemoglobin (Hb) and mean corpuscvlar hemoglobin concentration (MCHC) levels obtained in Exp. III, B and D B ewes were shown to be more resistant to a mixed infection of parasites than D ewes. However, this was not the case when the same ewes were reinfected with a relatively pure culture of 14. contortus larvae. While EPG, Hb and usually MCHC levels consistently favored B and D B sheep, breed differences were not significant. There was no evidence that levels of circulating antibodies were involved in breed resistance. (Key Words: Sheep, Parasite Resistance, Breeds, Antibodies.) I ntrod uction Gastrointestinal parasites are a serious problem in sheep and other ruminants.' The development and use of animals possessing a high degree of parasite resistance would offer several advantages over the present situation since control is obtained entirely with anthelmintics and husbandry practices. Some breeds and strains of sheep appear to have natural resistance to gastrointestinal parasites (Scrivner, 1964a,b; Loggins et al., 1965; Colglazier et al., 1968; Jilek and Bradley, 1969; Bradley et al., 1973; Knight et al., 1973). The initiation of a crossbreeding program in the North Carolina Agricultural Research Service flock presented an opportunity to investigate possible parasite resistance in sheep with widely different points of origin and genetic backgrounds. The primary breeds involved were the Polled Dorset, Rambouillet, Finnish Landrace and Barbados Blackbelly, a haired sheep originating in Barbados and other West Indies Islands. The objectives of this study were to deter- JOURNAL OF ANIMAL SCIENCE, Vol. 49, No. 4, 1979

2 920 YAZWINSKI ET AL. mine if these breeds, or their crosses, differed in their ability to resist gastrointestinal parasites, and, if so, to investigate possible physiological mechanisms responsible for the resistance. Experimental Procedure Exp. I consisted of four trials and utilized a total of 160 animals. The sheep used in each trial had been subjected to the same feed and management prior to being assigned to the experiment. At the beginning of each trial, animals were treated with standard doses of an anthelmintic. From this point, breed groups within trials were grazed together on grasslegume pastures that had been previously contaminated by grazing with sheep carrying mixed infections of parasites. No anthelmintics were administered during grazing. Fecal egg count at the end of the grazing periods was the criteria used to evaluate parasite resistance in the various breed groups. Fecal samples were examined for parasite ova according to a modified McMasters technique (Gordon and Whitlock, 1939). Numbers of parasite ova were expressed as eggs per gram of feces (EPG). Egg counts were made at frequent intervals during each trial but only the final EPG values were subjected to statistical analysis. At the final fecal examination in trials 1, 2 and 3, ova were counted and stratified according to techniques described by Dewhirst and Hansen (1961) into the following groups: (1) Haemoncbus contortus and Oesopbagostomum spp (HO group); (2) Cooperia spp, Tricbostrongylus spp and Ostertagia spp (CTO group); and (3) Nematodirus spp (NEM). A total of 37 yearling ewes were used in trial 1 and the following breed groups were compared: (1) seven Polled Dorsets (D), (2) 11 Dorset x Blackbelly crosses (D B), (3) nine Dorset x Landrace crosses (D L), and (4) 10 Rambouillet x Landrace crosses (R x L). These ewes were treated with a copper sulfate-nicotine sulfate drench on April 9 and grazed together on contaminated pasture until July 12 (94 days). During the trial the hemoglobin type of each ewe was determined by electrophoresis (Gelman Instrument Company Manual, 1969). For trials 2 and 3 a total of 69 lambs ap- 50mizole, Merck and Co., Inc., Rathway, NJ. etramisole, American Cyanamide Co,, Princeton, NJ. proximately 8 months old were treated witt thiabendazole s on July 12. After drenching, 11 non-blackbelly and 13 D B ram lambs werc assigned to trial 2, and 26 non-blackbelly anc 19 D B ewe lambs were assigned to trial 3 The non-blackbelly lambs were mainly Dorset, with a few D L lambs represented. Data or these lambs were reported under the D breed group in table 1. Ram and ewe lambs were grazed on separate contaminated pastures from July 12 to September 20 (70 days). Barbados Blackbelly (B), D and D B ewe., were compared in trial 4. Each breed group consisted of 18 mature, nongravid, ewes. All animals were treated with thiabendazole on April 10 and grazed together until July 17 (98 days). Parasite ova were not stratified in this trial. The efficacy of the anthelmintics administered in Exp. I was attested to by the fact that parasite ova were not found in the feces in any trial until at least 21 days after treatment. Exp. II consisted of two trials in which 8 month-old lambs were treated with anthelmin. tics and were reinfected with standard number., of larvae. Animals were maintained on concrete throughout the experiment. Breed groups were compared on the basis of (1) final EPG levels~ (2) numbers of parasites recovered from the digestive tract, and (3) eggs produced per para. site recovered (final EPG levels + numbers oi parasites recovered). Four D and four D B ram lambs (trial 1'~ were treated with levamisole hydrochloride 6 on October 4 and with thiabendazole on October 11. After 22 days of negative fecal egg counts (November 2), each animal was ad. ministered approximately 60,000 infective larvae (3,600 H. contortus; 29,700 Cooperia spp; 24,000 Tricbostrongylus spp and 2,70(3 Ostertagia spp). Larvae were produced by coprocuhure using sterilized peat moss and vermiculite as culture media. They were harvested by the Baermann technique (Todd et al., 1970) and were administered by stomach tube. Data on EPG levels by parasite groups were obtained as described for Exp. I. Rams were slaughtered after the final fecal collection on December 20 (48 days after infection) and parasites in the abomasum, small intestine and large intestine were collected by washing the contents of each section through a series of 850, 425, 250 and 10 /gm screens. Parasites recovered from the screens were counted, identified and stratified as to HO group, CTO group and NEM.

3 PARASITE RESISTANCE IN BLACKBELLY SHEEP 921 TABLE 1. MEAN FINAL EGGS PER GRAM OF FECES LEVELS (EXP. I AND 1I) Item Breed groups DX B D DX L RX L B Exp. I Trial 1 (yearling ewes) 11 7 CTO 236 a 1871 b HO 0 14 NEM 0 a 200 b Total 236 a 2085b 9 i b 1470 b a 20 a 2078 b 1490 b Trial 2 (ram lambs) CTO 3038 a 5473 b HO NEM Total 3231 a 5745 b 9 ~ Trial 3 (ewe lambs) CTO 563 a 1162 b HO 195 8O4 NEM 0 23 Total 758 a 1988 b Trial 4 (mature ewes) Total EPG 83 a 707 b Exp. II Trial I (ram lambs) 4 4 CTO 1675 a 4450 b HO NEM 0 0 Total 3225a 5750 b Trial 2 (ewe Iambs) No9 of animals 4 4 CTO 325 a 4900 b HO NEM 0 0 Total 1450 a b 9 ~ a 9 ~. a'bmeans on the same line with different superscripts differ significantly (P<.05). In trial 2 levamisole hydrochloride and thiabendazole drenches were administered to four D and four D B ewe lambs on October 11 and 18, respectively. On November 16, after 28 days of negative fecal egg counts, each animal received approximately 35,000 infective larvae (20,650 H. contortus; 350 Oesopbagostomum spp; 1,750 Cooperia spp; 9,100 Tricbostrongylus spp; and 3,150 Ostertagia spp). Ewes were slaughtered after the final fecal collection on January 4 (49 days after infection) and data on EPG levels and parasites in the digestive tract were obtained as previously described9 Six D, five B and six D x B ewes were compared in Exp III These were mature, nongravid females that had acquired mixed infections of parasites while grazing contaminated grass-legume and small grain pastures prior to the start of the experiment9 During the study

4 922 YAZWINSKI ET AL. (March 6 to July 1) they were maintained on concrete. The experiment consisted of three periods. In period 1 (March 6 to March 25) data were obtained while the ewes were carrying the worm burdens acquired during grazing. Ewes were bled at intervals as shown in table 4. A 10% solution of ethylenediaminetetraacetic acid was used as an anticoagulant. Hemoglobin levels (Hb), expressed as g/100 ml, were determined by the cyanmethemoglobin method (Clinical Methods Manual for the Bausch and Lomb Spectronic 20 Spectrophotometer, 1965). Mean corpuscular hemoglobin concentration (MCHC) was calculated as outlined by Coles (1967), and EPG levels were determined as described in Exp. I except that ova were not stratified. Specific antibody titers were measured in serum according to a procedure taken in part from a number of references (Stewart, 1950; Boyden, 1951; Stavitsky, 1954, 1964). The technique was one of indirect hemagglutination, wherein tanned sheep red blood cells were sensitized with an antigen source prepared by homogenizing third stage 11. contortus larvae in buffered saline. The microtitration technique was used to determine the actual titers. Period 2 (March 26 to April 25) was a transition period during which information was obtained after the ewes were drenched with levamisole hydrochloride on March 26. Data were obtained on Hb, MCHC, EPG and antibody levels as previously described. Total white blood cell levels (WBC) were also determined as outlined by Coles (1967). Period 3 extended from April 26 to July 1. A second anthelmintic, thiabendazole, was administered on April 26. Preinfection Hb, MCHC and WBC levels were obtained on May 2 and antibody titers on May 6. Immediately after bleeding on May 6 each animal was reinfected with approximately 10,000 larvae estimated to be 98% 11. contortus. Postinfection data were obtained on the variables listed above. While data on EPG levels were obtained at intervals during Experiment I and II, only the final values were subjected to statistical analysis. In trial 1 of Exp. I, EPG levels were highly variable, there were several values of zero and the distribution was not normal. Therefore, these data were transformed to log 10 and, along with all other data, were subjected to standard analysis of variance techniques (Snedecor and Cochran, 1967). Multiple mean corn- parisons were made according to Duncan's Multiple Range Test (P<.05). Results and Discussion Results of the final fecal egg counts for Exp. I and II are summarized in table 1. The data from trial 1, Exp. I, clearly shows that D x B ewes had lower (P<.05) CTO and total EPG levels than the other breed groups. Differences between D, D X L and R x L groups were not significant for these parameters. Dorset ewes had more NEM ova (P<.05) than the other groups, whereas EPG levels for HO parasites did not vary significantly. Ova from CTO parasites were most numerous in all breed groups. Gregory et al. (1939), Scrivner (1964a,b) and Rothwell et al. (1971) have also cited examples of breed resistance to gastrointestinal helminths. Data on the relationship of host hemoglobin type to EPG levels in trial 1 are shown in table 2. Evans et al. (1963), Jilek and Bradley (1969) and Radhakrishnan et al. (1972) have reported that sheep with type A hemoglobin were most resistant to H. contortus. In a later report Bradley et al. (1973) stated that sheep with type AB hemoglobin were more resistant than either type A or B. In the present study, however, D and D B ewes, which had the highest and lowest total EPG levels, were all of type B hemoglobin. Thus, hemoglobin type was not related to the difference in EPG levels observed in these groups. On the other hand, D L and R L ewes were about evenly divided between B and AB hemoglobin. In each group AB type ewes had lower CTO and total EPG levels than those with type B hemoglobin. However, numbers were limited and these differences were not statistically significant. The role of hemoglobin type in host resistance to gastrointestinal parasites is not clear and more research is needed in this area. In the present study there appears to be more than one physiological mechanism involved in parasite resistance. Data from trials 2, 3 and 4 of Exp. I also showed that D B and B sheep had lower CTO and(or) total EPG levels than non-blackbelly sheep. Differences in HO parasites and NEM were not significant in trials 2 and 3. Breed differences obtained in Exp. I could have been due to lethal or inhibitory effects which resulted in fewer or less fecund parasites in D B and B animals, or to differences in

5 PARASITE RESISTANCE IN BLACKBELLY SHEEP 923 TABLE 2. MEAN EGGS PER GRAM OF FECES LEVELS BY HEMOGLOBIN TYPE (EXP. I, TRIAL 1) TABLE 3. MEAN NUMBERS OF PARASITES RECOVERED AND EGGS PRODUCED PER PARASITE (EXP. II) Breed group Item D DX B DX L RX L Item DXB Breed group D Hemoglobin type B CTO HO NEM Hemoglobin type AB CTO O0 HO NEM Overall mean grazing habits of such nature that D x B and B sheep ingested fewer infective larvae. The results of the final fecal egg counts obtained in Exp. II are summarized in table 1. These data support those of Exp. I in that parasites of the CTO group were mainly responsible for the lower EPG levels in D X B sheep. The results also show that differences in EPG levels among breed groups were not due to differences in grazing habits and ingestion of fewer larvae since the experimental animals were maintained on concrete throughout the study. Data on numbers of parasites recovered from the digestive tract are presented in table 3. While Nematodirus spp were lower (P<.05) in D x B rams, differences for CTO and HO parasites were not significant in either rams or ewes. On the other hand, when egg production per worm recovered was determined (table 3), CTO parasites produced fewer ova (P<.05) in D B animals in both trials. Egg production per HO parasite was significantly lower in D x t3 ewes, but not in rams. Thus, parasites in D x B animals were less fecund and this appears to be the primary cause for breed variation in EPG levels rather than a reduction in number of parasites. It was also determined that only 4.5% of the H. comortus larvae administered to D x B ewe lambs were recovered as adult parasites, whereas over 14.0% were recovered from each of the other breed groups. Data from Exp. II suggests that both breed and sex of the host animal influence parasite development and function. Parasites recovered Trial 1 (ram lambs) CTO HO NEM Total Trial 2 (ewe lambs) CTO HO NEM Total Eggs produced per parasite Trial 1 (ram lambs) CTO HO Trial 2 (ewe lambs) CTO HO a b a.224 b a.439 b.647 a b a'bmeans on the same line with different superscripts differ significantly (P<.05). Colglazier et al. (1968) reported that haemonchosis was more severe in male than in female sheep. The results of Exp. III are summarized in table 4. In period 1, B and D x B ewes had significantly lower EPG levels than D ewes when removed from pasture (March 6) and after 8 days on concrete (March 14). These data are in agreement with those obtained in Experiment I and II with sheep carrying mixed infections of gastrointestinal parasites. From March 6 to March 14 there was a marked rise in EPG levels. A logical explanation for these results is that removing ewes from exposure to infective larvae on March 6 reduced the immune inhibition of fourth stage larvae described by Soulsby and Stewart (1960) so that maturation of inhibited larvae was occurring in the sheep used in the present study. On March 6, B ewes had a higher (P<.05)

6 924 YAZWINSKI ET AL. Hb level than D ewes, The D B group was intermediate to the parent breeds. By March 21 both B and D X B groups had significantly higher Hb levels. Hb loss, which is a measure of infection severity, was.5,.75 and.92 g/100 for B, D B and D groups, respectively. Blackbelly ewes also had a higher (P<.05) MCHC level than D ewes on March 21. Based on EPG, Hb and MCHC levels in period 1, B and D x B ewes were more resistant to a mixed infection of parasites than D ewes. Antibody titers obtained on March 14 were highly variable and differences among breed groups were not significant. Differences in EPG, Hb, MCHC and WBC levels did not vary significantly among breed groups during period 2, TABLE 4. MEAN EGGS PER GRAM OF FECES, HEMOGLOBIN, MEAN CORPUSCULAR HEMOGLOBIN CONCENTRATION, WHITE BLOOD CELL AND ANTIBODY LEVELS (EXP. IID Breed groups Item B D X B D Period 1 EPG Hb MCHC Antibodies Period 2 c EPG Hb MCHC WBC 5 6 March a 917 a March a 2300 a March March a ab March a 9.55 a March March a.339 ab March March April April April April April April April Period 3 d EPG Preinfection May Final July Hb Preinfection May Final June MCHC Preinfection May Final June WBC Preinfection May a 9550 a Final June Antibodies Preinfection May Final May b 5667 b b 7.63 b b b a'bmeans on same line with different superscripts differ significantly (P<.05). CAnimals drenched March 26. danimals drenched April 26 and reinfected May 6.

7 PARASITE RESISTANCE IN BLACKBELLY SHEEP 925 and only the initial and final values are presented in table 4. The anthelmintic treatment administered at the beginning of period 3 (April 26) did not reduce EPG levels to zero as in previous trials. Data on EPG, Hb, MCHC, WBC and antibody levels were obtained before the animals were reinfected with tl. contortus larvae on May 6. These data are presented in table 4 along with the final values for these variables. By early June there was a marked increase in EPG levels in all breed groups as a result of the larvae administered on May 6. However, EPG levels did not vary significantly among breed groups at any time after reinfection. These resuits are in marked contrast to those obtained for total EPG levels when the same sheep were carrying a mixed infection of parasites (period 1). They agree with previous data from Exp. I and II in that EPG levels for HO parasites did not vary significantly among breed groups. While antibody titers increased markedly in all breed groups after reinfection, differences were not significant and in this study there was no indication that circulating antibodies were involved in breed resistance to gastrointestinal parasites. Soulsby and Stewart (1960) were also unable to relate antibody levels with parasite resistance in sheep. Preinfection W13C levels were higher (P<.05) in B and D 13 ewes, but not at other sampling periods. All breed groups responded with elevated WBC levels after reinfection. Throughout period 3, Hb and usually MCHC levels were consistently higher in D and D B ewes than in Dorsets. However, breed differences were not significant and these data do not agree with those of period 1 when the ewes were carrying a mixed infection. The reasons for the breed differences obtained when sheep were carrying a mixed vs a relatively pure 1-1. contortus infection are not apparent at this time. The effects of mixed and pure infections could have varied with breed of host animal. It is also possible that the physiology and biochemistry of the digestive tract varied among breeds to the extent that parasite growth and development were affected. Some important relationships between the results obtained in periods 1 and 3 were observed. When breed groups were combined, the overall mean EPG level for period 3 was correlated with March 6 EPG levels (r =.75, P<.01). March 6 Hb and MCHC levels were also correlated with terminal Hb and MCHC levels of period 3 (r =.79,.61, P<.01). Therefore, animals exhibiting resistance to a naturally acquired mixed infection displayed the same relative resistance to a subsequent 11. contortus infection. This sort of repeatability would be essential in a program designed to select for parasite resistance. Jilek and Bradley (1969) also obtained repeatable results when studying both natural and artificially induced ovine haemonchosis. Literature Cited Boyden, S. V The absorption of proteins on erythrocytes treated with tannic acid and subsequent hemagglutination by antiprotein sera. J. Exp. Med. 93:107. Bradley, R. E., C. V. Radharkrishnan, V. G. Patil- Kulkarni and P. E. Loggins Responses in Florida Native and Rambouillet lambs exposed to one and two oral doses of Haemoncbus contortus. Amer. J. Vet. Res. 34:729. Clinical Methods Manual, Spectronic 20. m.p Bausch and Lomb, Inc., New York. Coles, E. H Veterinary Clinical Pathology. W. B. Saunders Co., Philadelphia, PA. Colglazier, M. L., I. L. Lindahl, J. H. Turner, G. 1. Wilson, G. E. Whitmore and R. L. Wilson Effect of management systems on the growth of lambs and development of internal parasitism. J. Parasit. 54:89. Dewhirst, L. W., and M. F. Hansen Methods to Differentiate and Estimate Worm Burdens in Cattle. Vet. Med. 56:84. Evans, J. V., M. H. Blunt and W. H. Southcott The effects of infection with Haernoncbus contortus on the sodium and potassium concentrations in the erythrocytes and plasma, in sheep of different hemoglobin types. Australian J. Agr. Res. 14: 549. Gordon, H. M. and Whitlock, H. V A new technique for counting nematode eggs in sheep feces. J. Council Scient. and Industrial Res. (Australian) 12:50. Gregory, P. W., R. F. Miller and M. A. Stewart An analysis of environmental and genetic factors influencing stomach worm infestation in sheep. J. Genetics 39:391. Jilek, A. F. and R. E. Bradley Hemoglobin types and resistance to Haernoncbus contortus in sheep. Amer. J. Vet. Res. 30:1773. Knight, R. A., H. H. Vegors and H. A. Glimp Effects of breed and date of birth of lambs on gastrointestinal nematode infections. Amer. J. Vet. Res. 32:323. Loggins, P. E., L. E. Swanson and M. Koger Parasite levels in sheep as affected by heredity. J. Anim. Sci. 24:286. Radhakrishnan, C. V., R. E. Bradley and P: E. Loggins Host responses of worm-free Florida Native and Rambouillet lambs experimentally infected with Haemoncbus contortus. Amer. J. Vet. Res. 33:817. Rothwell, T. L. W., J. K. Dineen and R. J. Love

8 926 YAZWINSKI ET AL. The role of physiologically active amines in resistance to Trichostrongylus colubriforrnis in the guinea pig. Immunology 21:925. Scrivner, L. H. 1964a. Breed resistance to ostertagiasis in sheep. J. Amer. Vet. Med. Assoc. 144:883. Scrivner, L. H. 1964b. Transmission of resistance to ovine ostertagiasis. J. Amer. Vet. Med. Assoc. 144:1024. Snedecor, G. W, and W. C. Cochran Statistical Methods. (6th Ed.) The Iowa State Univ. Press. Ames. Soulsby, E. J. L. and D. F. Stewart Serological studies of the self-cure reaction in sheep infected with Haernonchus contortus. Australian J. Agr. Res. 11:595. Stavitsky, A. B Micromethods for the study of proteins and antibodies. J. Immunol. 72:360. Stavitsky, A. B Immunological Methods. Blackwell Scientific Publications, New York. Stewart, D. F Studies on resistance of sheep to infestation with Haemoncbus contortus and Tricbostrongylus spp. and on the immunological reactions of sheep exposed to infestation. Australian J. Agr. Res. 1:301. Todd, K. S. Jr., Levine, N. D. and Anderson, F. L An evaluation of the Baermann Technique using infective larvae of H. contortus. Proc. Helminthol. Soc. Wash. 37:57.

Characterization of Haemonchus contortus

Characterization of Haemonchus contortus Nineteen percent of producers used anthelmintics exclusively in parasite management. Eighty percent use some form of pasture rest and/or rotation, 31 percent graze fields, and 7 percent are attempting

More information

INTERNAL PARASITES OF SHEEP AND GOATS

INTERNAL PARASITES OF SHEEP AND GOATS 7 INTERNAL PARASITES OF SHEEP AND GOATS These diseases are known to occur in Afghanistan. 1. Definition Parasitism and gastrointestinal nematode parasitism in particular, is arguably the most serious constraint

More information

OVULATION RATE AND LITTER SIZE OF BARBADOS, TARGHEE AND CROSSBRED EWES'

OVULATION RATE AND LITTER SIZE OF BARBADOS, TARGHEE AND CROSSBRED EWES' OVULATION RATE AND LITTER SIZE OF BARBADOS, TARGHEE AND CROSSBRED EWES' G. E. Bradford and J. F. Quirke 2 University of California 3, Davis 95616 ABSTRACT Ovulation rate was measured in Barbados Blackbelly

More information

HAGENIA ABYSSINICA (KOSSO) FOR INTERNAL PARASITE CONTROL IN GOATS

HAGENIA ABYSSINICA (KOSSO) FOR INTERNAL PARASITE CONTROL IN GOATS HAGENIA ABYSSINICA (KOSSO) FOR INTERNAL PARASITE CONTROL IN GOATS G. Abebe 1, L. J. Dawson 2, G. Detweiler 2, T. A. Gipson 2 and T. Sahlu 2 1 Awassa College of Agriculture, P.O. Box 5, Awassa, Ethiopia

More information

Gastrointestinal Nematode Infestations in Sheep

Gastrointestinal Nematode Infestations in Sheep Gastrointestinal Nematode Infestations in Sheep Phil Scott DVM&S, DipECBHM, CertCHP, DSHP, FRCVS Gastrointestinal nematode infestations are perhaps the most important group of conditions limiting intensive

More information

Control of Internal Parasites in Sheep

Control of Internal Parasites in Sheep Revised 1995 Sheep PUBLICATION 410-027 Control of Internal Parasites in Sheep W. Dee Whittier, Anne Zajac, and Steven H. Umberger* Introduction Internal parasites, or worms, cause economic and production

More information

Therapeutic efficacy of a mixture of ivermectin and closantel against gastrointestinal parasites in draft horses

Therapeutic efficacy of a mixture of ivermectin and closantel against gastrointestinal parasites in draft horses ( - ) ( ) % 88.0 19 %15.75 Oxyuris equi % 1.58 Strongylus spp..% 42.10 / 0.05.% 10.52 Parascaris equorum Parascaris equorum % 100 14 Strongylus spp. % 99.42 Oxyuris equi.gastrophilus nasalis Therapeutic

More information

Summary of Product Characteristics

Summary of Product Characteristics Summary of Product Characteristics 1 NAME OF THE VETERINARY MEDICINAL PRODUCT Orafluke 5% w/v Oral Suspension. 2 QUALITATIVE AND QUANTITATIVE COMPOSITION Each 1ml of suspension contains: Active Substances

More information

Breeding Performance of Purebred vs. Crossbred Hampshire and Suffolk Ramsl. David L. Thomas, Debi J. Stritzke and John E. Fields.

Breeding Performance of Purebred vs. Crossbred Hampshire and Suffolk Ramsl. David L. Thomas, Debi J. Stritzke and John E. Fields. Sheep Breeding Performance of Purebred vs. Crossbred Hampshire and Suffolk Ramsl Joe V. Whiteman, David L. Thomas, Debi J. Stritzke and John E. Fields Story in Brief A two year study comparing the breeding

More information

Economic Significance of Fasciola Hepatica Infestation of Beef Cattle a Definition Study based on Field Trial and Grazier Questionnaire

Economic Significance of Fasciola Hepatica Infestation of Beef Cattle a Definition Study based on Field Trial and Grazier Questionnaire Economic Significance of Fasciola Hepatica Infestation of Beef Cattle a Definition Study based on Field Trial and Grazier Questionnaire B. F. Chick Colin Blumer District Veterinary Laboratory, Private

More information

{Received 21st August 1964)

{Received 21st August 1964) RELATIONSHIP OF SEMEN QUALITY AND FERTILITY IN THE RAM TO FECUNDITY IN THE EWE C. V. HULET, WARREN C. FOOTE and R. L. BLACKWELL U.S. Department of Agriculture, Agriculture Research Service, Animal Husbandry

More information

FACTORS AFFECTING BLOOD UREA NITROGEN AND ITS USE AS AN INDEX OF THE NUTRITIONAL STATUS OF SHEEP. D. T. Torell I, I. D. Hume 2 and W. C.

FACTORS AFFECTING BLOOD UREA NITROGEN AND ITS USE AS AN INDEX OF THE NUTRITIONAL STATUS OF SHEEP. D. T. Torell I, I. D. Hume 2 and W. C. FACTORS AFFECTING BLOOD UREA NITROGEN AND ITS USE AS AN INDEX OF THE NUTRITIONAL STATUS OF SHEEP Summary D. T. Torell I, I. D. Hume 2 and W. C. Weir 3 University of California, Davis 95616 Three experiments

More information

A survey of the helminth parasites of cattle and sheep in Utah Valley

A survey of the helminth parasites of cattle and sheep in Utah Valley Great Basin Naturalist Volume 30 Number 3 Article 2 9-30-1970 A survey of the helminth parasites of cattle and sheep in Utah Valley J. Carl Fox Montana State University, Bozeman, Montana Ferron L. Andersen

More information

The current state of anthelmintic resistance in the UK and simple messages to slow the progression

The current state of anthelmintic resistance in the UK and simple messages to slow the progression The current state of anthelmintic resistance in the UK and simple messages to slow the progression 5 th July 2013 Dave Armstrong BVM&S CertSHP MRCVS 1 Periparturient (Spring) Rise - PPR Source: Veterinary

More information

EFFECT OF ENSILING ON ANTI-PARASITIC PROPERTIES OF SERICEA LESPEDEZA. Abstract

EFFECT OF ENSILING ON ANTI-PARASITIC PROPERTIES OF SERICEA LESPEDEZA. Abstract EFFECT OF ENSILING ON ANTI-PARASITIC PROPERTIES OF SERICEA LESPEDEZA T.H. Terrill 1, E. Griffin 1, D.S. Kommuru 1, J.E. Miller 2, J.A. Mosjidis 3, M.T. Kearney 2, and J.M. Burke 4 Abstract A study was

More information

Best Management Practices: Internal Parasite control in Louisiana Beef Cattle

Best Management Practices: Internal Parasite control in Louisiana Beef Cattle Christine B. Navarre, DVM Best Management Practices: Internal Parasite control in Louisiana Beef Cattle Introduction Controlling internal parasites in grazing cattle has a signiicant positive return on

More information

Parasite control in beef and dairy cattle

Parasite control in beef and dairy cattle Vet Times The website for the veterinary profession https://www.vettimes.co.uk Parasite control in beef and dairy cattle Author : Louise Silk Categories : Farm animal, Vets Date : August 22, 2016 Control

More information

Veterinary Parasitology

Veterinary Parasitology Veterinary Parasitology 166 (2009) 281 285 Contents lists available at ScienceDirect Veterinary Parasitology journal homepage: www.elsevier.com/locate/vetpar The identification of cattle nematode parasites

More information

Internal parasites in your small ruminants: Management is on the outside

Internal parasites in your small ruminants: Management is on the outside Internal parasites in your small ruminants: Management is on the outside Taken from the Summer 2004 issue of the Small Ruminant Dairy Newsletter www.uvm.edu/sustainableagriculture/smallrumi.html Sheep

More information

Summary of Product Characteristics

Summary of Product Characteristics Summary of Product Characteristics 1 NAME OF THE VETERINARY MEDICINAL PRODUCT Flukiver 5% w/v Oral Suspension 2 QUALITATIVE AND QUANTITATIVE COMPOSITION Active Substance Closantel (as Clostanel sodium)

More information

THE IDENTIFICATION OF GASTROINTESTINAL NEMATODES SPECIES IN SHEEP IN FIVE LOCALITIES FROM TIMIS COUNTY

THE IDENTIFICATION OF GASTROINTESTINAL NEMATODES SPECIES IN SHEEP IN FIVE LOCALITIES FROM TIMIS COUNTY THE IDENTIFICATION OF GASTROINTESTINAL NEMATODES SPECIES IN SHEEP IN FIVE LOCALITIES FROM TIMIS COUNTY D. INDRE¹, GH. DĂRĂBU޹, I. OPRESCU¹, S. MORARIU¹, NARCISA MEDERLE¹, M.S. ILIE¹, D.N. MĂNDIłĂ² ¹ Department

More information

EC Prevent Worms to Increase Sheep Profits

EC Prevent Worms to Increase Sheep Profits University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Historical Materials from University of Nebraska- Lincoln Extension Extension 1964 EC64-1905 Prevent Worms to ncrease Sheep

More information

1 of 9 7/1/10 2:08 PM

1 of 9 7/1/10 2:08 PM LIFETIME LAMB AND WOOL PRODUCTION OF TARGHEE OR FINN-DORSET- TARGHEE EWES MANAGED AS A FARM OR RANGE FLOCK N. Y. Iman and A. L. Slyter Department of Animal and Range Sciences SHEEP 95-4 Summary Lifetime

More information

THE EFFECT OF IBR/PI3 AND PASTEURELLA VACCINATION ON THE MORTALITY RATE OF HIGH PERCENTAGE EAST FRIESIAN LAMBS

THE EFFECT OF IBR/PI3 AND PASTEURELLA VACCINATION ON THE MORTALITY RATE OF HIGH PERCENTAGE EAST FRIESIAN LAMBS THE EFFECT OF IBR/PI3 AND PASTEURELLA VACCINATION ON THE MORTALITY RATE OF HIGH PERCENTAGE EAST FRIESIAN LAMBS David L. Thomas 1, Yves M. Berger 2, Brett M. McKusick 1, and Ralph H. Stauffacher 3 1 Department

More information

Diagnosing intestinal parasites. Clinical reference guide for Fecal Dx antigen testing

Diagnosing intestinal parasites. Clinical reference guide for Fecal Dx antigen testing Diagnosing intestinal parasites Clinical reference guide for Fecal Dx antigen testing Screen every dog at least twice a year The Companion Animal Parasite Council (CAPC) guidelines recommend including

More information

Crossbred lamb production in the hills

Crossbred lamb production in the hills Crossbred lamb production in the hills ADAS Pwllpeiran Cwmystwyth Aberystwyth Ceredigion SY23 4AB Institute of Rural Sciences University of Wales, Aberystwyth Llanbadarn Campus Aberystwyth Ceredigion SY23

More information

Summary of Product Characteristics

Summary of Product Characteristics Summary of Product Characteristics 1 NAME OF THE VETERINARY MEDICINAL PRODUCT Orafluke 10% w/v Oral Suspension. 2 QUALITATIVE AND QUANTITATIVE COMPOSITION Active Substances per ml Fenbendazole 100 mg Rafoxanide

More information

Integrated Parasite Management for Livestock

Integrated Parasite Management for Livestock Sustainable Parasite Management for Goats Ann Wells, D.V.M. Springpond Holistic Animal Health Prairie Grove, AR Introduction Integrated Parasite Management for Livestock Animals Immune System (Low Dose

More information

BORDER LEICESTER AND FINNSHEEP CROSSES. I. SURVIVAL, GROWTH AND CARCASS TRAITS OF FI LAMBS 1

BORDER LEICESTER AND FINNSHEEP CROSSES. I. SURVIVAL, GROWTH AND CARCASS TRAITS OF FI LAMBS 1 BORDER LEICESTER AND FINNSHEEP CROSSES. I. SURVIVAL, GROWTH AND CARCASS TRAITS OF FI LAMBS 1 A. F. Magid 2, V. B. Swanson 2, J. S. Brinks 2, G. E. Dickerson 3 and G. M. Smith 4 Colorado State University,

More information

Post-weaning Growth and Carcass Traits of St. Croix White and Dorper X St. Croix White Lambs Fed a Concentrate Diet in the U.S.

Post-weaning Growth and Carcass Traits of St. Croix White and Dorper X St. Croix White Lambs Fed a Concentrate Diet in the U.S. Volume 20, 2005 Post-weaning Growth and Carcass Traits of St. Croix White and Dorper X St. Croix White Lambs Fed a Concentrate Diet in the U.S. Virgin Islands R.W. Godfrey 1 and A.J. Weis Agricultural

More information

FEEDLOT PERFORMANCE, HEALTH, AND CARCASS CHARACTERISTICS OF BEEF HEIFERS TREATED WITH CYDECTIN OR DECTOMAX AT PROCESSING

FEEDLOT PERFORMANCE, HEALTH, AND CARCASS CHARACTERISTICS OF BEEF HEIFERS TREATED WITH CYDECTIN OR DECTOMAX AT PROCESSING Beef Cattle Research 2005 FEEDLOT PERFORMANCE, HEALTH, AND CARCASS CHARACTERISTICS OF BEEF HEIFERS TREATED WITH CYDECTIN OR DECTOMAX AT PROCESSING R. L. Hale, D. Gray 1, and R. Armendariz 2 Summary Two

More information

Superior sheep parasite control. But don t take our word for it.

Superior sheep parasite control. But don t take our word for it. FROM THE PEOPLE WHO BROUGHT YOU IVOMEC Merial (formerly MSD AGVET) has been providing innovative animal health products to Australian agriculture for over forty years. In the early sixties the introduction

More information

Summary of Product Characteristics

Summary of Product Characteristics Summary of Product Characteristics 1 NAME OF THE VETERINARY MEDICINAL PRODUCT Cydectin 1% w/v Injectable Solution for Sheep 2 QUALITATIVE AND QUANTITATIVE COMPOSITION Each ml contains Moxidectin Excipients

More information

EFFICACY OF ANTHELMINTICS: SPECIFIC RECOMMENDATIONS FOR CANINES

EFFICACY OF ANTHELMINTICS: SPECIFIC RECOMMENDATIONS FOR CANINES VICH GL19 (ANTHELMINTICS: CANINE) June 2001 For implementation at Step 7 - Draft 1 EFFICACY OF ANTHELMINTICS: SPECIFIC RECOMMENDATIONS FOR CANINES Recommended for Implementation on June 2001 by the VICH

More information

Sheep Infection by Haemonchus Species: Effect on Haematocrit and Evaluation of the FAMACHA Method in Arsi Negele District, Oromia, Ethiopia

Sheep Infection by Haemonchus Species: Effect on Haematocrit and Evaluation of the FAMACHA Method in Arsi Negele District, Oromia, Ethiopia Animal and Veterinary Sciences 2015; 3(2): 74-79 Published online April 13, 2015 (http://www.sciencepublishinggroup.com/j/avs) doi: 10.11648/j.avs.20150302.17 ISSN: 2328-5842 (Print); ISSN: 2328-5850 (Online)

More information

A New Approach to Parasite Management in Sheep

A New Approach to Parasite Management in Sheep A New Approach to Parasite Management in Sheep Presenters: Dr. Will R. Getz Dr. Tom Terrill Fort Valley State University Host/Moderator: Jay Parsons August 27, 2013 This webinar is being offered in cooperation

More information

EC Internal Parasites of Cattle

EC Internal Parasites of Cattle University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Historical Materials from University of Nebraska- Lincoln Extension Extension 1969 EC69-1907 nternal Parasites of Cattle

More information

KANSAS SHEEP RESEARCH

KANSAS SHEEP RESEARCH KANSAS SHEEP RESEARCH 1995 Report of Progress 728 Agricultural Experiment Station Kansas State University, Manhattan Marc A. Johnson Director TABLE OF CONTENTS Performance of Lambs Sired by Rambouillet,

More information

Tools for worming sheep in a changing landscape

Tools for worming sheep in a changing landscape Vet Times The website for the veterinary profession https://www.vettimes.co.uk Tools for worming sheep in a changing landscape Author : Neil Sargison Categories : Farm animal, Vets Date : October 12, 2015

More information

Potential for Hair Sheep in the United States

Potential for Hair Sheep in the United States Potential for Hair Sheep in the United States D. R. Notter Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24061-0306 Abstract Development of

More information

Sustainable Control of Parasites in Sheep SUSTAINABLE WORM CONTROL STRATEGIES FOR SHEEP. Dr K.A. Abbott, Prof. M. Taylor, L. A. Stubbings.

Sustainable Control of Parasites in Sheep SUSTAINABLE WORM CONTROL STRATEGIES FOR SHEEP. Dr K.A. Abbott, Prof. M. Taylor, L. A. Stubbings. Sustainable Control of Parasites in Sheep SUSTAINABLE WORM CONTROL STRATEGIES FOR SHEEP Dr K.A. Abbott, Prof. M. Taylor, L. A. Stubbings. ATechnical Manual for Veterinary Surgeons and Advisers March 2004

More information

REPRODUCTIVE PERFORMANCE FOR FOUR BREEDS OF SWINE: CROSSBRED FEMALES AND PUREBRED AND CROSSBRED BOARS

REPRODUCTIVE PERFORMANCE FOR FOUR BREEDS OF SWINE: CROSSBRED FEMALES AND PUREBRED AND CROSSBRED BOARS University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Papers and Publications in Animal Science Animal Science Department April 1984 REPRODUCTIVE PERFORMANCE FOR FOUR

More information

Long-term changes in the biology of a livestock farm system associated with the shift to organic supply

Long-term changes in the biology of a livestock farm system associated with the shift to organic supply 133 Long-term changes in the biology of a livestock farm system associated with the shift to organic supply A.D. MACKAY 1, B.P. DEVANTIER 1 and W.E. POMROY 2 1 AgResearch, Grasslands Research Centre, PB

More information

What You Can Do About It

What You Can Do About It What You Can Do About It Larry Reeves www.floridagoatranch.com lmreeves333@att.net American Consortium for Small Ruminant Parasite Control for the most up to date information available for goat producers

More information

We have two basic regimens for keeping the parasites in and on your horse to a minimum:

We have two basic regimens for keeping the parasites in and on your horse to a minimum: Equine Veterinary Associates Deworming Protocol We have two basic regimens for keeping the parasites in and on your horse to a minimum: 1. Rotational Deworming TIME FOR A CHANGE The goal of this regimen

More information

Checklist. KRAV s Extra Requirements for Sheep and Goat Meat. For verifying KRAV s extra requirements in the KRAV standards chapter 16 (edition 2017).

Checklist. KRAV s Extra Requirements for Sheep and Goat Meat. For verifying KRAV s extra requirements in the KRAV standards chapter 16 (edition 2017). Checklist KRAV s Extra Requirements for Sheep and Goat Meat For verifying KRAV s extra requirements in the KRAV standards chapter 16 (edition 2017). NAME OF OPERATOR (Primary producer):... Representative

More information

The Effect of Anthelmintic Treatment in Adult Dairy Cows on Milk Production

The Effect of Anthelmintic Treatment in Adult Dairy Cows on Milk Production The Effect of Anthelmintic Treatment in Adult Dairy Cows on Milk Production Page 1 of 8 More Information About This Topic From Merial: IVOMEC EPRINEX (eprinomectin) Pour-On for Beef and Dairy Cattle: A

More information

Summary of Product Characteristics

Summary of Product Characteristics Summary of Product Characteristics 1 NAME OF THE VETERINARY MEDICINAL PRODUCT Flukiver 50 mg/ml Solution for Injection 2 QUALITATIVE AND QUANTITATIVE COMPOSITION Active Substance Closantel (as Closantel

More information

THE EFFECT OF VITAMIN E SUPPLEMENTATION ON AN EXPERIMENTAL HAEMONCHUS CONTORTUS INFECTION IN DORSET LAMBS

THE EFFECT OF VITAMIN E SUPPLEMENTATION ON AN EXPERIMENTAL HAEMONCHUS CONTORTUS INFECTION IN DORSET LAMBS University of Rhode Island DigitalCommons@URI Open Access Master's Theses 2012 THE EFFECT OF VITAMIN E SUPPLEMENTATION ON AN EXPERIMENTAL HAEMONCHUS CONTORTUS INFECTION IN DORSET LAMBS Brittany Marie De

More information

Functional investigation of a QTL region affecting resistance to Haemonchus contortus in sheep

Functional investigation of a QTL region affecting resistance to Haemonchus contortus in sheep Functional investigation of a QTL region affecting resistance to Haemonchus contortus in sheep Guillaume Sallé 2, Carole Moreno 1, Julien Ruesche 1, Frédéric Bouvier 1, Mathias Aletru 1, Jean-Louis Weisbecker

More information

9/26/14 KNOW YOUR WEAPONS. We Made Parasite Problems. Know Your Weapons. What Are the Weapons? Available modern dewormers fall into in 3 groups

9/26/14 KNOW YOUR WEAPONS. We Made Parasite Problems. Know Your Weapons. What Are the Weapons? Available modern dewormers fall into in 3 groups KNOW YOUR WEAPONS We Made Parasite Problems Most parasites part of an animal s natural world Usually become a primary problem because of our management practices High density grazing on permanent pastures

More information

Detection of Gastrointestinal Helminthic and Protozoan Infections in Diarrhoeic Goats

Detection of Gastrointestinal Helminthic and Protozoan Infections in Diarrhoeic Goats International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 4 (2017) pp. 801-805 Journal homepage: http://www.ijcmas.com Original Research Article https://doi.org/10.20546/ijcmas.2017.604.100

More information

Lecture # 22: Superfamily Strongyloidea: The Strongyles of equids.

Lecture # 22: Superfamily Strongyloidea: The Strongyles of equids. Lecture # 22: Superfamily Strongyloidea: The Strongyles of equids. Objective: 1. List the morphological features shared by genera of the superfamily Strongyloidea. 2. Describe the larval migrations of

More information

KANSAS SHEEP RESEARCH 1994

KANSAS SHEEP RESEARCH 1994 KANSAS SHEEP RESEARCH 1994 Report of Progress 703 Agricultural Experiment Station Kansas State University, Manhattan Marc A. Johnson, Director TABLE OF CONTENTS Performance of Lambs Sired by Rambouillet,

More information

A comparison of faecal egg counts and body condition scores in young Peruvian alpacas

A comparison of faecal egg counts and body condition scores in young Peruvian alpacas A comparison of faecal egg counts and body condition scores in young Peruvian alpacas Joseph Whittle Royal (Dick) School of Veterinary Studies Acknowledgments: I declare that all the work in this project

More information

Blood Cell Characteristics and Some Hematological Values of American Pit-bull Terriers in Thailand

Blood Cell Characteristics and Some Hematological Values of American Pit-bull Terriers in Thailand World Applied Sciences Journal 2 (3): 158-162, 2007 ISSN 1818-4952 IDOSI Publications, 2007 Blood Cell Characteristics and Some Hematological Values of American Pit-bull Terriers in Thailand W. Aengwanich,

More information

Relationship between Coccidiosis Infection and Hematological Profile, Body Weight and Famacha Scores in Dorper Sheep

Relationship between Coccidiosis Infection and Hematological Profile, Body Weight and Famacha Scores in Dorper Sheep Relationship between Coccidiosis Infection and Hematological Profile, Body Weight and Famacha Scores in Dorper Sheep Nurzaty Ewani, A.H., Ariff 1 *, O.M., Sani 2, R.A. and Rasedee 3, A. 1 Department of

More information

Influence of advancement of age on intensity of strongyle infection and performance in sheep selected for resistance/resilience to infection

Influence of advancement of age on intensity of strongyle infection and performance in sheep selected for resistance/resilience to infection Indian Journal of Animal Sciences 84 (3): 30 00, March 2014/Article Influence of advancement of age on intensity of strongyle infection and performance in sheep selected for resistance/resilience to infection

More information

The Effect of Ewe Body Condition at Lambing on Colostral Immunoglobulin G Concentration and Lamb Performance 1,2

The Effect of Ewe Body Condition at Lambing on Colostral Immunoglobulin G Concentration and Lamb Performance 1,2 Published December 11, 2014 The Effect of Ewe Body Condition at Lambing on Colostral Immunoglobulin G Concentration and Lamb Performance 1,2 T. A. Al-Sabbagh, L. V. Swanson 3, and J. M. Thompson Department

More information

Pedigree Dorset Horn sheep in Australia

Pedigree Dorset Horn sheep in Australia Australian Journal of Exberimental Agriculture and Animal Husbandry: Pedigree Dorset Horn sheep in Australia I. Breed expansion and other vital s Summary-The Dorset Horn in Australia is maintained almost

More information

Crossbred ewe performance in the Welsh hills

Crossbred ewe performance in the Welsh hills Crossbred ewe performance in the hills Report on lamb performance to data (23 26) Prepared for: Lynfa Davies Hybu Cig Cymru Author: Dr Barbara McLean Livestock Research Scientist, ADAS Pwllpeiran Introduction

More information

Three-Year Serologic Immunity against Canine Parvovirus Type 2 and Canine Adenovirus Type 2 in Dogs Vaccinated with a Canine Combination Vaccine*

Three-Year Serologic Immunity against Canine Parvovirus Type 2 and Canine Adenovirus Type 2 in Dogs Vaccinated with a Canine Combination Vaccine* L. J. Larson and R. D. Schultz Three-Year Serologic Immunity against Canine Parvovirus Type 2 and Canine Adenovirus Type 2 in Dogs Vaccinated with a Canine Combination Vaccine* L. J. Larson, DVM R. D.

More information

Worm Control in Sheep

Worm Control in Sheep Worm Control in Sheep Contents Introduction Introduction...1 The benefits of parasitic worm control...2 Successful worm control...3 Worm life cycle...4 The key worm species...5 Assessing and reducing pasture

More information

Veterinary Medicinal Products (dips, injectables, pour ons and sprays) authorised in the UK for use against ectoparasites in sheep

Veterinary Medicinal Products (dips, injectables, pour ons and sprays) authorised in the UK for use against ectoparasites in sheep Veterinary Medicinal Products (dips, injectables, pour ons and sprays) authorised in the UK for use against ectoparasites in sheep (Products which are no longer authorised may be used until the expiry

More information

YOUTH breeding sheep SHOW (YBS)

YOUTH breeding sheep SHOW (YBS) Chairperson(s)/Contact Information: Chairperson Robert Dalton, (407) 973-4216, bob@bobcatacres.com Co- Chairperson Cathy Dalton (407) 973-1951, cathy@bobcatacres.com GENERAL RULES: PURPOSE: The intent

More information

FAMACHA for Parasite Control

FAMACHA for Parasite Control FAMACHA for Parasite Control Dr. Steve Hart Langston University There are several sources for information on parasite control and FAMACHA. The best single source is http://www.scsrpc.org. You can also

More information

Early detection of Haemonchus contortus infection in sheep using three different faecal occult blood tests

Early detection of Haemonchus contortus infection in sheep using three different faecal occult blood tests Open Veterinary Journal, (2015), Vol. 5(2): 90-97 ISSN: 2226-4485 (Print) ISSN: 2218-6050 (Online) Original Article Submitted: 04/03/2015 Accepted: 01/06/2015 Published: 11/07/2015 Early detection of Haemonchus

More information

Redacted for privacy

Redacted for privacy AN ABSTRACT OF THE THESIS OF Nabeel B. Saoud for the degree of Doctor of Philosophy in Animal Science presented on March 31, 1983. Title: Abstract Approved: SHEEP SELECTION IN RETROSPECT Redacted for privacy

More information

Cydectin. Fort Dodge PRODUCT DESCRIPTION

Cydectin. Fort Dodge PRODUCT DESCRIPTION Cydectin Fort Dodge moxidectin Injectable Solution for Beef and Nonlactating Dairy Cattle Antiparasitic Contains 10 mg moxidectin/ml Not for use in female dairy cattle of breeding age, veal calves, and

More information

Johne s s Disease Education Program for Beef Cattle

Johne s s Disease Education Program for Beef Cattle Johne s s Disease Education Program for Beef Cattle Dr. Kris Clothier Iowa State University Adapted from USDA guidelines and johnes.org Johne s s Highlights Johne s Disease is caused by Mycobacterium avium

More information

Department of Public Health, Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Nairobi 2

Department of Public Health, Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Nairobi 2 Bull. Anim. Hlth. Prod. Afr (2012) 60. 413-419 413 RISK FACTORS ASSOCIATED WITH GASTROINTESTINAL NEMATODE INFECTIONS OF CATTLE IN NAKURU AND MUKURWEINI DISTRICTS OF KENYA 1 *, Gitau G K 2, Kitala P M 1,

More information

SUMMARY OF PRODUCT CHARACTERISTICS

SUMMARY OF PRODUCT CHARACTERISTICS SUMMARY OF PRODUCT CHARACTERISTICS 1. NAME OF THE VETERINARY MEDICINAL PRODUCT Covexin 10 Suspension for injection for sheep and cattle 2. QUALITATIVE AND QUANTITATIVE COMPOSITION Active substances Potency

More information

North Central Regional Extension Publication 235. Feeding Ewes

North Central Regional Extension Publication 235. Feeding Ewes North Central Regional Extension Publication 235 Feeding Ewes North Central Regional Extension Publications are prepared as a part of the Cooperative Extension activities of the 13 land-grant universities

More information

Gastrointestinal nematodes

Gastrointestinal nematodes PARASITOLOGY Parasites are one of the most important considerations in the overall health of the Alpaca. It is imperative to learn what are the common parasites that are common to your particular area

More information

and other serological tests in experimentally infected cattle

and other serological tests in experimentally infected cattle J. Hyg., Camb. (1982), 88, 21 21 Printed in Great Britain A comparison of the results of the brucellosis radioimmunoassay and other serological tests in experimentally infected cattle BY J. HAYES AND R.

More information

Exploring the Sheep and Goat Industry

Exploring the Sheep and Goat Industry Lesson B2 4 Exploring the Sheep and Goat Industry Unit B. Animal Science and the Industry Problem Area 2. Identifying and Understanding the Segments of the Animal Science Industry Lesson 4. Exploring the

More information

OIE international standards on Rabies:

OIE international standards on Rabies: Regional cooperation towards eradicating the oldest known zoonotic disease in Europe Antalya, Turkey 4-5 December 2008 OIE international standards on Rabies: Dr. Lea Knopf Scientific and Technical Department

More information

ABSTRACT. aspect is very sparse and in view of its importance. MATERIALS AND METHODS

ABSTRACT. aspect is very sparse and in view of its importance. MATERIALS AND METHODS MICROMETRICAL STUDIES ON THE SKIN OF MADRAS RED SHEEP (OVIS ARIES) IN DIFEERENT AGE GROUPS Mir Shabir Ahmad 1, O.R. Sathyamoorthy 2, Geetha Ramesh 3 and C. Balachandran 4 Department of Veterinary Anatomy

More information

Sheep Breeding. Genetic improvement in a flock depends. Heritability, EBVs, EPDs and the NSIP Debra K. Aaron, Animal and Food Sciences

Sheep Breeding. Genetic improvement in a flock depends. Heritability, EBVs, EPDs and the NSIP Debra K. Aaron, Animal and Food Sciences ASC-222 Sheep Breeding Heritability, EBVs, EPDs and the NSIP Debra K. Aaron, Animal and Food Sciences Genetic improvement in a flock depends on the producer s ability to select breeding sheep that are

More information

Key Components to Successful Flock Health. Goals of a Flock Health Program VETERINARY CLIENT PATIENT RELATIONSHIP

Key Components to Successful Flock Health. Goals of a Flock Health Program VETERINARY CLIENT PATIENT RELATIONSHIP Key Components to Successful Flock Health Dr. Hollie Schramm Production Management Medicine, VMRCVM Clinical Professor Goals of a Flock Health Program Improve overall health and welfare (relationship with

More information

Management to Avoid Tail Docking Sheep

Management to Avoid Tail Docking Sheep Animal Welfare Approved Technical Advice Fact Sheet No. 2 Management to Avoid Tail Docking Sheep Animal Welfare Approved has the most rigorous standards for farm animal welfare currently in use by any

More information

USE OF COPPER SULFATE TO CONTROL HAEMONCHUS CONTORTUS INFESTATION IN HAMPSHIRE EWES

USE OF COPPER SULFATE TO CONTROL HAEMONCHUS CONTORTUS INFESTATION IN HAMPSHIRE EWES University of Kentucky UKnowledge University of Kentucky Master's Theses Graduate School 2011 USE OF COPPER SULFATE TO CONTROL HAEMONCHUS CONTORTUS INFESTATION IN HAMPSHIRE EWES Melinda Mallory Simpson

More information

Department 4-H Sheep. Superintendents: Matthew Pike. Premium Scale: 1st - $ nd - $8.00 3rd - $6.00 4th - $4.00 5th - $2.00

Department 4-H Sheep. Superintendents: Matthew Pike. Premium Scale: 1st - $ nd - $8.00 3rd - $6.00 4th - $4.00 5th - $2.00 Superintendents: Matthew Pike Department - 4-H Sheep Entries: Online Only - http://adco.fairentry.com Deadline: June 30, 2017 Entry Fee: $3.00 Per Entry (unless otherwise specified) Arrival & Vet Checks

More information

A Summary of Swine Crossbreeding Research at. Auburn University. Bulletin 595 September 1988 Alabama Agricultural Experiment Station.

A Summary of Swine Crossbreeding Research at. Auburn University. Bulletin 595 September 1988 Alabama Agricultural Experiment Station. 5 Bulletin 595 September 1988 Alabama Agricultural Experiment Station Auburn University Nell T. Frobish, Director Auburn University, Alabama r- ' t A Summary of Swine Crossbreeding Research at Auburn University

More information

AUTUMN AND SPRING-LAMBING OF MERINO EWES IN SOUTH-WESTERN VICTORIA

AUTUMN AND SPRING-LAMBING OF MERINO EWES IN SOUTH-WESTERN VICTORIA AUTUMN AND SPRING-LAMBING OF MERINO EWES IN SOUTH-WESTERN VICTORIA J. W. MCLAUGHLIN* Summary In each of four years, ewes lambing in the spring (September-October) had a higher proportion of multiple births

More information

Adjustment Factors in NSIP 1

Adjustment Factors in NSIP 1 Adjustment Factors in NSIP 1 David Notter and Daniel Brown Summary Multiplicative adjustment factors for effects of type of birth and rearing on weaning and postweaning lamb weights were systematically

More information

COMMITTEE FOR VETERINARY MEDICINAL PRODUCTS

COMMITTEE FOR VETERINARY MEDICINAL PRODUCTS The European Agency for the Evaluation of Medicinal Products Veterinary Medicines and Information Technology EMEA/CVMP/005/00-FINAL-Rev.1 COMMITTEE FOR VETERINARY MEDICINAL PRODUCTS GUIDELINE FOR THE TESTING

More information

Chapter 6 TREATMENT OF MIXED OESOPHAGOSTOMUM AND HOOKWORM INFECTION: EFFECT OF ALBENDAZOLE, PYRANTEL PAMOATE, LEVAMISOLE AND THIABENDAZOLE

Chapter 6 TREATMENT OF MIXED OESOPHAGOSTOMUM AND HOOKWORM INFECTION: EFFECT OF ALBENDAZOLE, PYRANTEL PAMOATE, LEVAMISOLE AND THIABENDAZOLE Chapter TREATMENT OF MIXED OESOPHAGOSTOMUM AND HOOKWORM INFECTION: EFFECT OF ALBENDAZOLE, PYRANTEL PAMOATE, LEVAMISOLE AND THIABENDAZOLE HP Krepel, T Haring, S Baeta and AM Polderman Published in the Transactions

More information

Lamb Production of Dorper, Katahdin, and St. Croix Bred in Summer, Winter, or Spring in the Southeastern United States

Lamb Production of Dorper, Katahdin, and St. Croix Bred in Summer, Winter, or Spring in the Southeastern United States University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Publications from USDA-ARS / UNL Faculty U.S. Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska

More information

A Parasiticide for the Treatment and Control of Internal and External Parasites of Cattle and Swine

A Parasiticide for the Treatment and Control of Internal and External Parasites of Cattle and Swine MERIAL LTD. USA Product Label http://www.vetdepot.com 3239 SATELLITE BLVD., DULUTH, GA, 30096 Telephone: 888-637-4251 Website: www.merial.com IVOMEC 1% INJECTION FOR CATTLE AND SWINE Merial (ivermectin)

More information

Cellular Immune Response and Abomasum worm burden in Goats Vaccinated with HC58cDNA Vaccine against H. contortus Infection

Cellular Immune Response and Abomasum worm burden in Goats Vaccinated with HC58cDNA Vaccine against H. contortus Infection Cellular Immune Response and Abomasum worm burden in Goats Vaccinated with HC58cDNA Vaccine against H. contortus Infection C. I. Muleke 1, Yan Ruofeng 2, Sun Yanming 2, I. M. Osuga 3, R. S. Shivairo 1,

More information

SEROPREVALENCE OF BRUCELLA SPP, LEPSTOSPIRA SPP AND TOXOPLASMA GONDII IN WILD BOARD (SUS SCROFA) FROM SOUTHERN BRAZIL

SEROPREVALENCE OF BRUCELLA SPP, LEPSTOSPIRA SPP AND TOXOPLASMA GONDII IN WILD BOARD (SUS SCROFA) FROM SOUTHERN BRAZIL SEROPREVALENCE OF BRUCELLA SPP, LEPSTOSPIRA SPP AND TOXOPLASMA GONDII IN WILD BOARD (SUS SCROFA) FROM SOUTHERN BRAZIL Iara Maria Trevisol 1, Beatris Kramer 1, Arlei Coldebella¹, Virginia Santiago Silva

More information

Course Curriculum for Master Degree in Poultry Diseases/Veterinary Medicine

Course Curriculum for Master Degree in Poultry Diseases/Veterinary Medicine Course Curriculum for Master Degree in Poultry Diseases/Veterinary Medicine The Master Degree in Poultry Diseases /Veterinary Medicine, is awarded by the Faculty of Graduate Studies at Jordan University

More information