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1 THE ONDERSTEPOORT JOURNAL OF VETERINARY RESEARCH 1987 Numbersl-4 SUBJECT INDEX Acari Some wild hosts of the Karoo paralysis tick, Ixodes rubicundus Neumann, 1904 (Acari: Ixodidae). I. G. HORAK, L. C. MOOLMAN and L. J. FOURIE..... Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae). I. G. HORAK, K. M. DEF. MACIVOR, T. N. PETNEY ANDV. DEVOS Aegyptianella pullorum Broiler pulmonary hypertension syndrome. l. Increased right ventricular mass in broilers experimentally infected with Aegyptianella pullorum. F. W. HUCHZERMEYER, J. A. CILL!ERS, CELESTINA D. DIAZ LAVIGNE and R. A. BARTKOWIAK Aflatoxicosis Pathological findings in a natural outbreak of aflatoxicosis in dogs. STELLA S. BAST!ANELLO, J. W. NESBIT, M. C. WILLIAMS and A. LUCIA LANGE African horsesickness virus A single dilution enzyme-linked immunosorbent assay for the quantitative detection of antibodies to African horsesickness virus. R. WILLIAMS..... African swine fever African swine fever. ll. Functional disturbances of thrombocytes in pigs infected with virulent haemadsorbing and nonhaemadsorbing virus isolates. J. A. NESERand C. KOTZE African vectors of heartwater The ecology of the African vectors of heartwater, with particular reference to Amblyomma hebraeum and Amblyomma variegatum. T. N. PETNEY,l. G. HORAK andy. REcHAV AJpha toxin Purification of the alpha toxin of Clostridium perfringens type A by ultrafiltration and gel chromatography. M. W. ODEN DAAL Amblyomma The tick vectors of Cowdria ruminantium (Ixodoidea, Ixodidae, genus Amblyomma) and their distribution. JANE B. WALKER, with illustrations by A. 0LWAGE.... Danger of introducing heartwater onto the American mainland: Potential role of indigenous and exotic Amblyomma ticks. N. BA.RRE,G. UILENBERG, P. C. MORELand E. CAMUS..... Rera~ ~~~~~~~i~~jj.~~~~t~e~~~~~~- ~~~-i~~. ~~-~ -~~~- ~~ -~~-~-~~~~ - ~~~~~~~~~~~- ~~~~~~~~~ -- -~. -~. -~~~~: The use of flumethrin I o/o pour-on for the control of Amblyomma spp. in various southern African countries. H. D. HAMEL Amblyomma hebraeum Control of induced infestations of adult Amblyomma hebraeum with sustained release ivermectin. M. D. SOLL,l. H. CAR MICHAEL and SHEILA J. GROSS Ultrastructural features of Cowdria ruminantium in midgut epithelial cells and salivary glands for nymphal Amblyomma hebraeum. KATHERINEM. KOCAN, J. D. BEZUIDENHOUTand ALETHART..... Distinctive staining of colonies of Cowdria ruminantium in midguts of Amblyomma hebraeum. C. E. YUNKER, K. M. KOCAN, R. A. I. NORVALand M. J. BURRIDGE The ecology of the African vectors of heartwater, with particular reference to Amblyomma hebraeum and Amblyomma variegatum. T. N. PETNEY,l. G. HORAK andy. REcHAV..... Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae). I. G. HORAK, K. M. DEF. MACIVOR,T. N. PETNEYand V. DEVOS.... Biochemical studies of the salivary glands and haemolymph of Amblyomma hebraeum. A. W. H. NEITZ and N. M. J. VERMEULEN Biochemical studies on the eggs of Amblyomma hebraeum. N. M. J. VERMEULEN and A. W. H. NEITZ..... Th~:!~~~ ~~ ~~~~N~~ ~~Jt'~. ah~~e;-.~~~i-~~- :.:,~~~-t~~-~~- ~~ ~~~~~~-~~- ~~~~~-~~-~-~ -~ -~~- ~~~ ~~- ~-~ -~~!.~~~-~~ -~~~~~ Amblyomma marmoreum Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae). I. G. HORAK, K. M. DE F. MACIVOR, T. N. PETNEY and V. DEVOS.... Amblyomma ticks Morphology and development of Cowdria ruminantium in Amblyomma ticks. K. M. KOCAN and J. D. BEZUIDENHOUT.... Amblyomma variegatum The ecology of the African vectors of heartwater, with particular reference to Amblyomma hebraeum and Amblyomma vanegatum. T. N. PETNEY, I. G. HORAK andy. RECHAV American mainland Danger of introducing heartwater onto the American mainland: Potential role of indigenous and exotic Amblyomma ticks. N. BARRE, G. UILENBERG, P. C. MOREL and E. CAMUS Anaplasma The genome of Anaplasma: DNA base composition and DNA/DNA hybridization. R. E. AMBROSIO and F. T. POTG!ETER... Anaplasma antibodies The persistence of colostral Anal.lasma antibodies and incidence of in utero transmission of Anaplasma infections in calves under laboratory conditions.. T. POTG!ETER and L. van RENSBURG.... Anaplasma centrale Tick transmission of Anaplasma centrale. F. T. POTG!ETER and L. van RENSBURG DNA probes for the detection of Anaplasma centrale and Anaplasma marginale. ELIZABETH S. VISSER and R. E. AMBROSIO Anaplasma infections The persistence of colostral Anaplasma antibodies and incidence of in utero transmission of Anaplasma infections in calves under laboratory conditions. F. T. POTGIETERand L. VANRENSBURG { {

2 Anaplasma marginale DNA probes for the detection of Anaplasma cenlrale and Anaplasma marginate. ELIZABETH S. VISSER and R. E. AMBROSIO Angora goats Problems encountered in the control of heartwater in Angora goats. B. GRUSS.... API staph system Some features of coagulase positive staphylococci from bovine milk. ll. Comparison of conventional techniques and the API staph system. J. A. ERASMUS,P. A.]. BRAND and MARIONM. M. GALBRAITH.... Asteraceae Ovine hepatogenous photosensitivity caused by the plant Nidorellafoetida (Thunb.) DC. (Asteraceae). D. J. SCHNEIDER, JENNIFER R. GREEN and M.G. COLLETT Avian hosts of Amblyomma Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae). I. G. HORAK, K. M. DEF. MACIVOR, T. N. PETNEYand V. DEVOS Babesia cabaui An investigation into the clinical pathological changes aod serological response in horses experimentally infected with BabesiaequiandBabesiacaballi. D. T. DEWAAL,J. VANHEERDENandF. T. PoTGIETER..... The transstadial transmission of Babesia caballi by Rhipicephalus evertsi evertsi. D. T. DEW AAL and F. T. POTGIETER.... Babesia equi An investigation into the clinical pathological changes and serological response in horses experimentally infected with BabesiaequiandBabesia caballi. D. T. DEWAAL,J. VANHEERDENand F. T. POTGIETER Bacteria The relationship between the skin and some bacterial species occurring on it in the Merino. B. C. JANSEN and MARIANNA HAYES Biochemical studies Biochemical studies of the salivary glands and haemolymph of Amblyomma hebraeum. A. W. H. NEITZ and N. M. J. VERMEULEN Biochemical studies on the eggs of Amblyomma hebraeum. N. M. J. VERMEULEN and A. W. H. NEITZ..... Block method of vaccination The block method of vaccination against heartwater. J. L. DU PLESSIS and LETITIA MALAN.... Blow-Dies Seasonal abundance of carrion-frequenting blow-flies (Diptera: Calliphoridae) in the Kruger National Park. L. E. 0. BRAACKand V. DEVOS.... Blue ticks The resistance spectrum shown by a fenvalerate-resistant strain of the blue tick (Boophilus decoloratus) to a range of ixodicides. BRIGETTEB. COETZEE,G. D. STANFORD and D. A. T. DAVIS Resistance by the blue tick (Boophilus decoloratus) to the synthetic pyrethroid, fenvalerate. BRIGETTE B. COETZEE, G. D. STANFORD and D. A. T. DAVIS Bluetongue The identification of factors capable of reversing the core-mediated inhibition of the bluetongue virus transcriptase. ALBER- DINA A. VAN DUK and H. HUISMANS..... Boophilus decoloratus The resistance spectrum shown by a fenvalerate-resistant strain of the blue tick (Boophilus decoloratus) to a range of ixodicides. BRIGETTEB. COETZEE,G. D. STANFORD and D. A. T. DAVIS Resistance by the blue tick (Boophilus decoloratus) to the synthetic pyrethroid, fenvalerate. BRIGETTE B. COETZEE, G. D. STANFORDandD. A. T. DAVIS.... Bovine milk Some features of coagulase positive staphylococci from bovine milk. II. Comparison of conventional techniques and the API staph system. J. A. ERASMUS, P. A. J. BRANDandMARIONM. M. GALBRAITH.... Brain biopsy The use of electro-encephalography and brain biopsy in the clinical diagnosis of heartwater. S. R. van AMSTEL..... Broilers Broiler pulmonary hypertension syndrome. I. Increased right ventricular mass in broilers experimentally infected with Aegyptianella pullorum. F. W. HUCHZERMEYER, J. A. CILLIERS, CELESTINA D. DIAZ LAVIGNE and R. A. BARTKOWIAK Broiler pulmonary hypertension syndrome. ll. The direct measurement of right ventricular and pulmonary artery pressures in the closed chest domestic fowl. A. J. GUTHRIE,]. A. CILLIERS, F. W. HUCHZERMEYERand VALERIEM. KILLEEN.... BruceUa The use of Meso-erythritol sensitivity discs in the typing of Brucella strains. P.M. P!ETERSON, LESLEY A. TEBRUGGEand S. HERR Bufadienolide Experimental evidence that the active principle of the poisonous plant Thesium lineatum L.f. (Santalaceae) is a bufadieno Iide. L.A. P. ANDERSON, J. P. J. JOUBERT, R. ANITRA SCHULTZ, T. S. KELLERMAN and BARENDINA J. PIENAAR... BurcheU's mountain zebras Studies on the '\varasites c;>f zebras,. y. Nematodes of the Burchell's and Hartmann's mountain zebras from the Etosha National Park, South est Afnca/NarrubJa. ROSINA C. SCIALDO-KREcEK, R. K. REINECKE and F. S. MALAN..... Bushbuck Parasites of South African wildlife. I. Helminths of bushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal. J. BOOMKER, M. E. KEEP and I. G. HORAK CaUiphoridae Seasonal abundance of carrion-frequenting blow-flies (Diptera: Calliphoridae) in the Kruger National Park. L. E. 0. BRAACKand V. DEVOS ~ _8

3 Calves The persistence of colostral Anaplasma antibodies and incidence of in utero transmission of Anaplasma infections in calves underlaboratoryconditions. F. T. PoTG!EfERandL. VANRENSBURG.... Campylobacter fetus A comparative study of the growth of Campylobacter fetus strains in liquid media. MARTHA L. van DER WALT.... The demonstration of the K-~ntigen of Campylobacter fetus venerialis using a microtitre agglutination test. MARTHA L. van DERWALT.... Cardiac glycoside poisoning Cardiac glycoside poisoning in sheep caused by Urgineaphysodes (Jacq.) Bale and the isolated physodine A. P. W. NEL, R. ANrrRA SCHULTZ,P. JORDAAN,L. A. P. ANDERSON, T. S. KELLERMAN and CLARE REID..... Caribbean Epidemiology of heartwater in Guadeloupe and in the Caribbean. E. CAMUS and N. BARRE.... Cattle Further studies on the clinical pathology of sweating sickness in cattle. S. R. VAN AMSTEL, F. REYERS, R. T. OBEREM and O.MATTHEE.... Antibody response in cattle to oil emulsion rabies and ephemeral fever vaccines. C. M. CAMERON, B. J. H. BARNARD, ERNA ERASMUS and W. J. S. BOTHA..... The non-specific resistance of cattle to heartwater. J. L. DU PLESSIS and LETITIA MALAN... :.... De:~J~~e~~ ~f~'?}.a~~e~~u::~tn.~-~~~~~-~-~ ~~ ~~~~~~ i-~ -~~- ~~~~~~~~ -~~ -~~~-~~:.~~~~ -~~~~- ~~~~ ~~~-~~~~ Antibiotic sensitivity of Pasteurella haemolytica isolated by means of a fibreoptic endoscope from cases of pneumonic pasteurellosis in cattle. S. R. VAN AMSTEL,MARYKEHENTON,M. A. WITCOMB, B. FABIANandP. VERVOORT.... The incidence of Coxiella burnetii antibodies in cattle in the Transvaal. B. GUMMOW,N. PoERSTAMPERand S. HERR..... Cell lines The present state of Cowdria ruminantium cultivation in cell lines. J.D. BEZUIDENHOUT.... Ceratopogonidae A ~o:kfes!ege ~fj!~bl:~:.aff.tp~tp~r ~~~~~~-~~~ ~~: -~~-i~~~~ -~~~- ~:~~-~~~~~~~~~ ~~-i~~~-: -~~~t~~~~~~!. ~~~ Chemical control of heartwater Chemical control of the heartwater vectors. J. SCHRODER.... Chemotactic factor Production of a macrophage chemotactic factor by cultured jaagsiekte tumour cells. M. S. MYER, D. W. VERWOERD and HELEN M. GARNE'IT..... Demonstration of growth-inhibitory as well as growth stimulatory factors in medium conditioned by lung lavage cells stimulated with a chemotactic factor secreted by jaagsiekte tumour cells. M.S. MYER, D. W. VERWOERD and HELEN M. GARNE'IT.... Clamydias Metabolism and genetics ofchlamydias and Rickensias. J. C. WILLIAMS and M. H. VODKIN..... Clinical pathology of sweating sickness Further studies on the clinical pathology of sweating sickness in cattle. S. R. van AMSTEL, F. REYERS, P. T. OBEREM and 0. MATTHEE Clostridium perfringens Purification of the alpha toxin of Clostridium perfringens type A by ultrafiltration and gel chromatography. M. W. ODEN DAAL Core-mediated inhibition of bluetongue The identification of factors capable of reversing the core-mediated inhibition of the bluetongue virus transcriptase. ALBER- DINA A. VAN DUK and H. HUISMANS Cowdria ruminantium Ultrastructural features of Cowdria ruminantium in midgut epithelial cells and salivary glands for nymphal Amblyomma hebraeum. KATHERINEM. KOCAN,J. D. BFZUIDENHOUTandALETHART.... Heartwater: The morphology of Cowdria ruminantium and its staining characteristics in the vertebrate host and in vitro. L. PROZESKY Morphology and development of Cowdria ruminantium in Amblyomma ticks. K. M. KOCAN and J. D. BFZUIDENHOUT..... Distinctive staining of colonies of Cowdria ruminantium in midguts of Amblyomma hebraeum. C. E. YUNKER, K. M. KOCAN,R. A. I. NORVALandM. J. BURRIDGE..... Cowdria ruminantium: Stability and preservation of the organism. L. L. LOGAN.... Heartwater: The development and life cycle of Cowdria ruminantium in the vertebrate host, ticks and cultured endothelial cells. L. PROZESKY and J. L. DUPLESSIS The development of Cowdria ruminantium in neutrophils. L. L. LOGAN, T. C. WHY ARD, J. C. QUINTERO and C. 1\. MEBUS The present state of Cowdria ruminantium cultivation in cell lines. J. D. BEZUIDENHOUT.... Purification of Cowdria ruminantium by density gradient centrifugation. A. W. H. NEITZ, N. M. J. VERMEULEN and G. J. VITJOEN.... Purification of Cowdria ruminantium by lectin cellular affinity chromatography. N. M. J. VERMEULEN, A. W. H. NEITZ and G. J. VITJOEN Purification of Cowdria ruminantium by immunoadsorbent affinity chromatography. A. W. H. NEITZ and N. M. J. VERMEU- LEN... :.... The construction of fie nomic libraries of Cowdria ruminantium in an expression vector, 'A.gt II. R. E. AMBROSIO, J. L. DU PLESSISandJ. D. EZUIDENHOUT.... Cowdria ruminantium infection in the mouse: A review. P. K. I. MACKENZIE and N. MCHARDY..... Heartwater. The artificial transmission of Cowdria ruminantium in domestic ruminants and mice. L. PROZESKY..... The diagnosis of heartwater at post mortem in ruminants and the confmnation of Cowdria ruminantium in mice. L. PROZESKY {; {)

4 Theoretical aspects of the enzyme-linked immunosorbent assay technique and its use in the detection of Cawdria ruminantium antigen and antibody in reacting animals. G. J. VllJOEN, N. M. J. VERMEULEN and A. W. H. NEriZ..... The serological relationship between Cowdria ruminantium and certain members of the genus Ehrlichia. C. J. HOLLAND, L. L. LoGAN, C. A. MEBUS and M. RISTIC. (Abstract only).... Cross-immunity between isolates of Cowdria ruminantium. L. L. LoGAN, E. G. BIRNIE and C. A. MEBUS (Abstract only).... The tick vectors of Cowdria ruminantium (Ixodoidea, Ixodidae, genus Amblyomma) and their distribution. JANE B. WALKER, with illustrations by A. 0LWAGE.... Identification of drugs effective against Cowdria ruminantium using a mouse screening system. N. MCHARDY and P. K. I. MACKENZIE.... The efficacy of alternative routes for the infection or vaccination of animals with Cowdria ruminantium. J.D. BFZUIDEN- HOUT,J. A. OLIVIER, B. GRUSS and J. V. BADENHORST.... CoxieUa burnetii The incidence of Coxiella burnetii antibodies in cattle in the Transvaal. B. GUMMOW, N. POERSTAMPERand S. HERR.... Cross-immunity Cross-immunity between isolates of Cowdria ruminantium. L. L. LOGAN, E. G. BIRNIE and C. A. MEBUS (Abstract only)... Culicoides A ~~ides~:ge ~fi!~i,i:~t~a:~t.t~~tp~r ~~~~~~-~~~ -~~~:. ~~-i~.~~~- ~~~. ~~:!~~~-~~~~~~~~~~ ~~i~~~~~.:. ~~~t-~~~~~~~~!. ~~~ Afrotropical Culicoides: A resdescription of C. (Avaritia) kanagai Khamala & Kettle, 1971, reared from elephant dung in the Kruger National Park, South Africa. R. MEISWINKEL..... Culicoides (Avaritia) kanagai Afrotropical Culicoides: A redescription of C. (Avaritia) kanagai Khamala & Kettle, 1971, reared from elephant dung in the Kruger National Park, South Africa. R. MEISWINKEL Density gradient centrifugation Purification of Cowdria ruminantium by density gradient centrifugation. A. W. H. NEriZ, N. M. J. VERMEULEN and G. J. VllJOEN.... Dihydrogriesenin The development of an ELISA-assay for semi-quantitative detection of dihydrogriesenin, a sesquiterpene lactone from Geigeria. J. A. VERSCHOOR,L. BORNMANandN. M. J. VERMEULEN.... Dipping T~~!~~ T~ ~:~~~ ~:ii~~-wo~--~~~~- ~:.~!~~~~~~. ~~ ~~~.":.~. ~~~~~-~~.~~ -~-~~- ~~~. ~~- ~-~ -~~!~~~~~ -~~~~ Diptera A ~~ides~~ege ~fi!~i,'t~:a:~t _tp~tp~r ~~~~~~~~~ ~~~:. ~~-i~~~~~ -~~~- ~~~:. 1 ~~ -~~~~~~~~~.~.(~i~~~~~.:. ~~~~t~~~~~~~~!. ~~ Musca nevilli sp. nov. (Diptera, Muscidae) a dung-breeding fly from South Africa. K. P. N. KLEYNHANS.... Seasonal abundance of carrion-frequenting blow-flies (Diptera: Calliphoridae) in the Kruger National Park. L. E. 0. BRAACKand V. DEVos.... DNA base composition The genome of Anaplasma: DNA base composition and DNA/DNA hybridization. R. E. AMBROSIO and F. T. PoTGJETER... DNA/DNA hybridization The genome of Anaplasma: DNA base composition and DNA/DNA hybridization. R. E. AMBROSIO and F. T. POTGIETER... DNA probes DNA probes for the detection of Anaplasma centrale and Anaplasma marginale. ELIZABETH S. VISSER and R. E. AMBROSIO Dogs Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores. I. G. HORAK, AMY JACOT GUILLARMOD, L. C. MOOLMAN and V. DEVos.... Pathological fmdings in a natural outbreak of aflatoxicosis in dogs. STELLA S. BASTIANELLO, J. W. NESBIT, M. C. WILLIAMS and A. LUCIA LANGE.... Domestic animals Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores. I. G. HORAK,AMYJACOTGUJLLARMOD,L. C. MOOLMANand V. DEVOS..... Domestic ruminants Heartwater. An overview of the clinical signs, susceptibility and differential diagnoses of the disease in domestic ruminants. H. VAN DE PYPEKAMP and L. PROZESKY Heartwater in hosts other than domestic ruminants. P. T. OBEREM and J. D. BEZUIDENHOUT.... Heartwater. The artificial transmission of Cowdria ruminantium in domestic ruminants and mice. L. PROZESKY.... Drugs Identification of drugs effective against Cowdria ruminantium using a mouse screening system. N. MCHARDY and P. K. I. MACKENZIE Dung-breeding flies Musca nevilli sp. nov. (Diptera, Muscidae) a dung-breeding fly from South Africa. K. P. N. KLEYNHANS..... Eggs Biochemical studies on the eggs of Amblyomma hebraeum. N. M. J. VERMEULEN and A. W. H. NErrz..... Ehrlichia The serological relationship between Cowdria ruminantium and certain members of the genus Ehrlichia. C. J. HOLLAND, L. L. LoGAN, C. A. MEBUS and M. RISTIC. (Abstract only).... Electric currents The use of electronarcosis as anaesthetic in the cichlid, Oreochromis mossambicus (Peters). I. General experimental procedures and the role of fish length on the narcotizing effects of electric currents. W. T. BARHAM, H. J. SCHOONBEE and J. G. J. VISSER

5 Electro-encephalography The use of electro-encephalography and brain biopsy in the clinical diagnosis of heartwater. S. R. VAN AMSTEL.... Electronarcosis The use of electronarcosis as anaesthetic in the cichlid, Oreochromis mossambicus (Peters). I. General experimental procedures and the role of fish length on the narcotizing effects of electric currents. W. T. BARHAM, H. J. SCHOONBEE and J. G. J. VISSER Elephant dung Afrotropical Culicoides: A redescription of C. (Avaritia) kanagai Khamala & Kettle, 1971, reared from elephant dung in the Kruger National Park, South Africa. R. MEISWINKEL Elisa The development of an ELISA-assay for semi-quantitative detection of dihydrogriesenin, a sesquiterpene lactone from Geigeria. J. A. VERSCHOOR,L. BORNMANandN. M. J. VERMEULEN A single dilution enzyme-linked immunosorbent assay for the quantitative detection of antibodies to African horsesickness virus. R. WILUAMS Theoretical aspects of the enzyme-linked immunosorbent assay technique and its use in the detection of Cowdria ruminantium antigen and antibody in reacting animals. G. J. VILJOEN, N. M. J. VERMEULEN and A. W. H. NEm Emergence trap A ~~i&s~~ie ~~;~~:~t~l~t.tp~~rxior ~~~~~~~~~.~~~:.~~.i~~~~. ~~~. ~~~. 1 ~~.~~~~~~~~.~.<~.i~~~~~. ~~~~t~~~.~~~~~:. ~~~ Endothelial cells Heartwater: The development and life cycle of Cowdria ruminantium in the vertebrate host, ticks and cultured endothelial cells. L. PROZESKY and J. L. DUPLESSIS Enzyme electrophoresis Enzyme electrophoresis of South African Schistosoma mattheei and S. haematobium. F. J. KRUGER Ephemeral fever Antibody response in cattle to oil emulsion rabies and ephemeral fever vaccines. C. M. CAMERON, B. J. H. BARNARD, ERNA ERASMUS and W. J. S. BOTHA..., Epidemiological data Problems with the interpretation of epidemiological data in heartwater: A study on 23 farms. J. L. DU PLESSIS and LETITIA MALAN , Escherichia coli Resistance to various antibiotics of Salmonella and Escherichia coli isolated from registrable farm feeds. ANNETTE M. DURAND, MARIE LUISE BARNARD, MARTHA L. SW ANEPOEL and MARIE M. ENGELBRECIIT Equine metritis A rapid microtitration serum agglutination test for the detection of contagious equine metritis antibodies. B. GUMMOW, S. HERRandO. L. BRETT Equus zebra zebra Description of incisors of known-age Cape mountain zebras, Equus zebra zebra from the Mountain Zebra National Park. B. L. PENZHORN Expression vector T~~~~~~~J~ r/ ~~~~~~~e~. ~.~ ~~~~~i~.~~~.i~~ ~i.~~. ~~. ~.~.~~.~~.~~~~~.~~t.~::.~.~~. ~.1... ~.'.~:.~~~.~~I.~:.~ :.~.. ~~ Farm animals Specific immunity in farm animals to heartwater. C. G. STEW ART..... Farm feeds Resistance to various antibiotics of Salmonella and Escherichia coli isolated from registrable farm feeds. ANNETTE M. DURAND, MARIE LUISE BARNARD, MARTHA L. SW ANEPOEL and MARIE M. ENGELBRECIIT Fenvalerate The resistance spectrum shown by a fenvalerate-resistant strain of the blue tick (Boophilus decoloratus) to a range of ixodicides. BRIGETTEB. COETZEE,G. D. STANFORD and D. A. T. DAVIS..... Resistance by the blue tick (Boophilus decoloratus) to the synthetic pyrethroid, fen valerate. BRIGETTE B. COETZEE, G. D. STANFORD and D. A. T. DAVIS Fibreoptic endoscope Antibiotic sensitivity of Pasteurella haemolytica isolated by means of a fibreoptic endoscope from cases of pneumonic pasteurellosis in cattle. S. R. VANAMSTEL, MARYKEHENTON, M. A. WITCOMB, B. FABIANandP. VERVOORT Fish The use of electronarcosis as anaesthetic in the cichlid, Oreochromis mossambicus (Peters). I. General experimental procedures and the role of fish length on the narcotizing effects of electric currents. W. T. BARHAM, H. J. SCHOONBEE and J. G. J. VISSER Flumethrin The use of flumethrin 1 %pour-on for the control of Amblyomma spp. in various southern African countries. H. D. HAMEL Fowls Broiler pulmonary hypertension syndrome. II. The direct measurement of right ventricular and pulmonary artery pressures in the closed chest domestic fowl. A. J. GUTHRIE, J. A. CILLIERS, F. W. HUCHZERMEYER and VALERIE M. KILLEEN..... Future prospects on heartwater Future prospects and goal setting regarding research on heartwater. R. D. BIGALKE Geigeria The development of an ELISA-assay for semi-quantitative detection of dihydrogriesenin, a sesquiterpene lactone from Geigeria. J. A. VERSCHOOR,L. BORNMAN and N. M. J. VERMEULEN Gel chromatography Purification of the alpha toxin of Clostridium perfringens type A by ultrafiltration and gel chromatography. M. W. ODEN DAAL ~ ~ W

6 Genetic resistance Genetic resistance of Guadeloupe native goats to heartwater. G. MATHERON,N. BARRE, E. CAMUs and J. GOGUE..... Genomic libraries Th~:~~~~~~~ g~ fi~~~~~~e~. ~~ ~~~~~i~.~~~.;~~~;.~~. ~~. ~~.~~~~.~~~~~.~~t.~~:.~~~. ~.1... ~.. ~:. ~~~~~~.~:.~ :.~.. ~~ Goats Diagnosis of heartwater in the live animal: Experiences with goats in Guadeloupe. E. CAMUS and N. BARRE.... Genetic resistance of Guadeloupe native goats to heartwater. G. MATHERON, N. BARRE, E. CAMUS and J. GOGUE.... The reservoir status of goats recovered from heartwater. N. BARRE and E. CAMUS A preliminary investigation into the efficacy of intraperitoneal vaccination of sheep and goat kids against heartwater. L. R. HURTER.... Grey duiker Parasites of South African wildlife. l. Helminths ofbushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal. J. BOOMKER,M. E. KEEP and I. G. HoRAK.... Growth-inhibitory factors Demonstration of growth-inhibitory as well as growth-stimulatory factors in medium conditioned by lung lavage cells stimulated with a chemotactic factor secreted by jaagsiekte tumour cells. M.S. MYER, D. W. VERWOERD and HELEN M. GARNETT.... Growth-stimulatory factors Demonstration of growth-inhibitory as well as growth-stimulatory factors in medium conditioned by lung lavage cells stimulated with a chemotactic factor secreted by jaagsiekte tumour cells. M. S. MYER, D. W. VERWOERD and HELEN M. GARNETT Guadeloupe Diagnosis of heartwater in the live animal: Experiences with goats in Guadeloupe. E. CAMUS and N. BARRE..... Genetic resistance of Guadeloupe native goats to heartwater. G. MATHER ON, N. BARRE, E. CAMUS and J. GOGUE.... Epidemiology of heartwater in Guadeloupe and in the Caribbean. E. CAMUS and N. BARRE.... Gut F~~~~A lfdm~~~~r~k~~~o~c~~hg~'!j:~~.. i~.~~~.. ~t.. ~~. ~~.~. ~.i~:.~.. i~~~~.~~~~.. ~:. i t s.~~~.~~~~. ~.~~~.. ~~~~: Haemolymph Biochemical studies of the salivary glands and haemolymph of Amblyomma hebraeum. A. W. H. NEITZ and N. M. J. VERMEULEN.... Haemonchus contortus Two field strains of Haemonchus conjortus resistant to rafoxanide. J. A. VANWYK, F. S. MALAN, H. M. GERBER and REGINAM. R. ALVES..... Hartmann's mountain zebras Studies on the parasites ~f zebras: y. Nematodes of the Burchell's and Hartmann's mountain zebras from the Etosha National Park, South West Africa/Narrubia. ROSINA C. SCIALDO-KREcEK, R. K. REINECKE and F. S. MALAN..... Heartwater Welcoming address to the workshop on heartwater: past, present and future. F. J. VAN DERMERWE.... The historical background and global importance of heartwater. A. PROVOST and J. D. BEZUIDENHOUT.... Heartwater: The morphology of Cowdria ruminantium and its staining characteristics in the vertebrate host and in vitro. L. PROZESKY Heartwater: The development and life cycle of Cowdria ruminantium in the vertebrate host, ticks and cultured endothelial cells. L. PROZESKY and J. L. DUPLESSIS The taxonomic status of the causative agent of heartwater. G. R. SCOTT.... Heartwater. An overview of the clinical signs, susceptibility and differential diagnoses of the disease in domestic ruminants. H. VAN DE PYPEKAMP and L. PROZESKY.... Heartwater in hosts other than domestic ruminants. P. T. OBEREM and J. D. BEZUIDENHOUT.... Heartwater. The artificial transmission of Cowdria ruminantium in domestic ruminants and mice. L. PROZESKY..... The pathology of heartwater. III. A review. L. PROZESKY.... The clinical pathology and pathophysiology of heartwater: A review. S. R. VAN AMSTEL, A. J. GUTHRIE, F. REYERS, H. BERTSCHINGER,P. T. 0BEREM, VALERIEM. KiLLEENandO. MATTHEE Diagnosis of heartwater in the live animal: Experiences with goats in Guadeloupe. E. CAMUS and N. BARRE.... The use of electro-encephalography and brain biopsy in the clinical diagnosis of heartwater. S. R. van AMSTEL.... The diagnosis of heartwater at post mortem in ruminants and the confirmation of Cowdria ruminantium in mice. L. PROZESKY.... The pathogenesis of heartwater. J. L. DUPLESSIS, LElTIIA MALAN and Z. E. KOWALSKI.... The application of the indirect fluorescent antibody test in research on heartwater. J. L. ou PLESSIS and LElTIIA MALAN.... Heartwater serology: Some problems with the interpretation of results. J. L. ou PLESSIS, E. CAMUS, P. T. OBEREM and LETITIA MALAN The non-specific resistance of cattle to heartwater. J. L. ou PLESSIS and LETITIA MALAN.... Genetic resistance of Guadeloupe native goats to heartwater. G. MATHERON, N. BARRE, E. CAMUS and J. GOGUE.... Specific immunity in farm animals to heartwater. C. G. STEW ART Specific immunity in mice to heartwater. C. G. STEWART..... Natural transmission of heartwater. J. D. BEZUIDENHOUT Danger of introducing heartwater onto the American mainland: Potential role of indigenous and exotic Amblyomma ticks. N. BARRE, G. UILENBERG, P. C. MORELand E. CAMUS Epidemiology of heartwater in Guadeloupe and in the Caribbean. E. CAMUS and N. BARRE

7 Problems with the interpretation of epidemiological data in heartwater: a study on 23 farms. J. L. DUPLESSIS and LETITIA MALAN The reservoir status of goats recovered from heartwater. N. BARRE and E. CAMUS.... RarnJ. R~~~~~:dt~~~rr~~~~~z~~~- ~~~-i-~~ -~~. ~ -~~~~- ~~ ~~~~~~ -~~~~~~~~~~ -~~~~-~~~ -. -~. -~. -~~~~: Thetreatmentofheartwater. S. R. VANAMSTELandP. T. OBEREM The production of heartwater vaccine. P. T. OBEREMand J. D. BEZUIDENHOUT..... The infection and treatment method of vaccination against heartwater. LENTE van DERMER WE The block method of vaccination against heartwater. J. L. DUPLESSIS and LETITIA MALAN A ~~~~. ~~-~~~~~~~~~~~.i.~~~- ~.~ -~~~~~. ~~.i~~~~~~~~~~~ -~~~~~~~~~.~~-~~~~.~~ -~~~~ -~~-~ -~~~~~.~-~~~~~. ~ :.~ : De;~J~~e~~ ~f~~l.i{.i~~~~~~.:.~~~~-~.~ ~~ ~~~~~~.i~ -~~- ~~~~~~~~~~ ~~-~~~~~~~~~ -~~~~~ - ~~~~ ~~~-~~~ Problems encountered in the control of heartwater in Angora goats. B. GRUSS.... Chemical control of the heartwater vectors. J. SCHRC>DER The control of heartwater by means of tick control. J. D. BEZUIDENHOUT and R. D. BIGALKE.... The natural control of heartwater vectors. A. M. SPICKETT Future prospects and goal setting regarding research on heartwater. R. D. BIGALKE..... Heartwater serology Heartwater serology: Some problems with the interpretation of results. J. L. DUPLESSIS, E. CAMUS, P. T. OBEREM and LETITIA MALAN.... Helminths Parasites of South African wildlife. 1. Helminths ofbushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal. J. BooMKER,M. E. KEEP and I. G. HORAK Historical background of heartwater The historical background and global importance of heartwater. A PRovosT and J. D. BEZUIDENHOUT.... Horses An investigation into the clinical pathological changes and serological response in horses experimentally infected with Babesia equi and Babesia caballi. D. T. DE WAAL,J. VAN HEERDENand F. T. POTGIETER... : Hypertension syndrome Broiler pulmonary hypertension syndrome. 1. Increased right ventricular mass in broilers experimentally infected with Aegyptianel/.apullorum. F. W. HUCHZERMEYER, J. A. CILLIERS, CELESTINAD. DIAZLAVIGNEandR. A. BARTKOWIAK Broiler pulmonary hypertension syndrome. II. The direct measurement of right ventricular and pulmonary artery pressures in the closed chest domesticfow I. A. J. GUTHRIE, J. A. CILLIERS, F. W. HUCHZERMEYER and VALERIE M. KlLLEEN Immunoadsorbent aff'mity chromatography Purification of Cowdria ruminantium by immunoadsorbent affinity chromatography. A. W. H. NEITZ and N. M. J. VERMEU LEN Incisors Description of incisors of known-age Cape mountain zebras, Equus zebra zebra from the Mountain Zebra National Park. B. L. PENZHORN.... Indirect Ouorescent antibody test The application of the indirect fluorescent antibody test in research on heartwater. J. L. DUPLESSIS and LETITIA MALAN.... Infection techniques Re:.rnJ. ~~~~~~~dtf.~b~~e~~~- ~~-i~~ -~~-~ -~~- ~-~~~-~~~- ~~~~~~~~~~- ~~~~~~~~.. ~.. ~.. ~~~: lvermectin Control of induced infestations of adult Amblyomma hebraeum with sustained release ivermectin. M. D. SOLL, I. H. CAR- MICHAEL and SHEILA J. GROSS.... Ixodes rubicundus Some wild hosts of the Karoo paralysis tick, Ixodes rubicundus Neumann, 1904 (Acari: Ixodidae). I. G. HORAK, L. C. MooLMAN and L. J. FOURIE Ixodicides The resistance spectrum shown by a fenvalerate-resistant strain of the blue tick (Boophilus decoloratus) to a range of ixodicides. BRIGETTEB. COETZEE, G. D. STANFORD and D. A. T. DAVIS..... Ixodidae Some wild hosts of the Karoo paralysis tick, Ixodes rubicundus Neumann, 1904 (Acari: Ixodidae). I. G. HORAK, L. C. MOOLMAN and L. J. FOURIE The tick vectors of Cowdria ruminantium (Ixodoidea, Ixodidae, genus Amblyomma) and their distribution. JANE B. WALKER, with illustrations by A. OLWAGE.... Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae). I. G. HORAK, K. M. DEF. MAciVOR,T. N. PETNEYand V. DEVOS.... Ixodid ticks Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores. I. G. HORAK, AMY JACOT GUILLARMOD, L. C. MOOLMAN and V. DEVOS Ixodoidea The tick vectors of Cowdria ruminantium (Ixodoidea, Ixodidae, genus Amblyomma) and their distribution. JANE B. WALKER, with illustrations by A. 0LWAGE Jaagsiekte tumour ceus Production of a macrophage chemotactic factor by cultured jaagsiekte tumour cells. M. S. MYER, D. W. VERWOERD and HELENM. GARNETT : Pag_e

8 Demonstration of growth-inhibitory as well as growth-stimulatory factors in medium conditioned by lung lavage cells stimulated with a chemotactic factor secreted by jaagsiekte tumour cells. M. S. MYER, D. W. VERWOERD and HELEN M. GARNETr K-antigen The demonstration of the K-antige!l of Campylobacter fetus venerialis using a microtitre agglutination test. MARTHA L. VAN DERWALT.... Karoo paralysis tick Some wild hosts of the Karoo paralysis tick, Ixodes rubicundus Neurriann, 1904 (Acari: Ixodidae). I. G. HORAK, L. C. MOOLMAN and L. J. FOURIE.... Kikuyu pastures Parasites in sheep grazing on Kikuyu (Pennesetum clandestinum) pastures in the winter rainfall region. R. K. REINECKE, R. KiRKPATRICK,LYDIASWART,ANNA M. D. KRIELandF. FRANK Lactobacillus acidophilus FrM~~~A :.dm~~~~:~kz:~jo:.c~~uhg~~~~~-.i~ -~- -~ t -~~- ~~ -~-i~: -~~-.i.~~~~-~~~~-.~:. -~t-~ -~~-~~~~- ~ -~~- -~~-~~: Lectin cellular aft"mity chromatography Purification of Cowdria ruminantium by lectin cellular affinity chromatography. N. M. J. VERMEULEN, A. W. H. NEITZ and G. J. VIUOEN Leptospira interrogans serovar pomona The isolation of Leptospira interrogans serovar pomona and related serological findings associated with a mixed farming unit in the Transvaal. J. F. DELANGE, B. GUMMOW,G. V. TURNER and A. R. REDMAN..... Leptospirosis Leptospirosis as a cause of ''white spot'' kidneys in South African pig abattoirs. PAMELA HUNTER, F. H. VANDER VYVER, ANNESELMER-OLSEN,MARYKEM. HENTON,S. HERRandJ. F. DELANGE.... Liquid media A comparative study of the growth of C ampylobacter fetus strains in liquid media. MARTHA L. van DER WALT.... Lung lavage cells Demonstration of growth-inhibitory as well as growth-stimulatory factors in medium conditioned by lung lavage cells stimulated with a chemotactic factor secreted by jaagsiekte tumour cells. M.S. MYER, D. W. VERWOERD and HELEN M. GARNETr Mammalian hosts of Amblyomma Some avian and mammalian hosts of Amblyomma hebraeum and Amblyomma marmoreum (Acari: Ixodidae).!. G. HORAK, K. M. DEF. MACIVOR, T. N. PETNEYand V. DEVOS.... Merino The relationship between the skin and some bacterial species occurring on it in the Merino. B. C. JANSEN and MARIANNA HAYES Meso-erythritol sensitivity discs The use of Meso-erythritol sensitivity discs in the typing of Brucella strains. P. M. PIETERSON, LESLEY A. TE BRUGGE and S. HERR.... Mice Cowdria ruminantium infection in the mouse: A review. P. K. I. MACKENZIE and N. MCHARDY..... Heartwater. The artificial transmission of Cowdria ruminantium in domestic ruminants and mice. L. PROZESKY.... The diagnosis of heartwater at post mortem in ruminants and the confirmation of Cowdria ruminantium in mice. L. PROZESKY.... Specific immunity in mice to heartwater. C. G. STEWART.... The ecology of the African vectors of heartwater, with particular reference to Amblyomma hebraeum and Amblyomma variegatum. T. N. PETNEY,I. G. HORAK andy. REcHAV.... Microtitre agglutination test The demonstration of the K-antigen of Campylobacter fetus venerialis using a microtitre agglutination test. MARTHA L. van DERWALT.... Midgut epithelial cells Ultrastructural features of Cowdria ruminantium in midgut epithelial cells and salivary glands for nymphal Amblyomma hebraeum. KATHERINEM. KOCAN,J. D. BEZUIDENHOUTandALETHART.... Midguts Distinctive staining of colonies of Cowdria ruminantium in midguts of Amblyomma hebraeum. C. E. YUNKER, K. M. KOCAN, R. A. I. NORVALand M. J. BURRIDGE Mixed farming The isolation of Leptospira interrogans serovar pomona and related serological fmdings associated with a mixed farming unit in the Transvaal. J. F. DELANGE, B. GUMMOW,G. V. TURNER and A. R. REDMAN.... Musca lusorla The colonization and life-cycles of Musca lusoria, Musca xanthomelas and Musca nevilli, vectors of Parajilaria bovicola in South Africa. E. M. NEVILLandB. SUTHERLAND Musca nevilli Musca nevilli sp. nov. (Diptera, Muscidae) a dung-breeding fly from South Africa. K. P. N. KLEYNHANS..... The colinization and life-cycles of Musca lusoria, Musca xanthomelas and Musca nevilli, vectors of Parafilaria bovicola in South Africa. E. M. NEVILL and B. SUTHERLAND Musca xanthomelas The colonization and life-cycles of Musca lusoria, Musca xanthomelas and Musca nevilli, vectors of Parajilaria bovicola in South Africa. E. M. NEVILL and B. SUTHERLAND.... Muscidae Musca nevilli sp. nov. (Diptera, Muscidae) a dung-breeding fly from South Africa. K. P. N. KLEYNHANS <:i lll <:i

9 Narcotizing effects of electric currents The use of electronarcosis as anaesthetic in the cichlid, Oreochromis mossambicus (Peters). I. General exrrimental procedures and the role of fish length on the narcotizing effects of electric currents. W. T. BARHAM, H.. SCOONBEE and J. G. J. VISSER.... Natural control of heartwater The natural control of heartwater vectors. A. M. SPICKETI Natural transmission Natural transmission of heartwater. J. D. BEZUIDENHOUT Nematodes Studies on the parasites of zebras. V. Nematodes of the Burchell's and Hartmann's mountain zebras from the Etosha National Park, South West Africa!Namibia. ROSINA C. SC!ALDO-KRECEK, R. K. REINECKE and F. S. MALAN.... Neutrophils The development of Cowdria ruminantium in neutrophils. L. L. LOGAN, T. C. WHYARD,J. C. QUINTERO and C. A. MEBUS Nidorella foetida Ovine hepatogenous photosensitivity caused by the plant Nidorellafoetida (Thunb.). DC. (Asteraceae). D. J. SCHNEIDER, JENNIFERR. GREENandM. G. COLLETT.... Occurrence of Schistosoma mattheei The occurrence of Schistosoma mattheei in the south-western Transvaal. P. H. JOUBERT, V. L. HAM!LTON-ATTWELL and F. J. KRUGER Oreochromis mossambicus The use of electronarcosis as anaesthetic in the cichlid, Oreochromis mossambicus (Peters). I. General experimental procedures and the role of fish length on the narcotizing effects of electric currents. W. T. BARHAM, H. J. SCHOONBEE and J. G. J. VISSER Ovine hepatogenous photosensitivity Ovine hepatogenous photosensitivity caused by the plant Nidorellafoetida (Thunb). DC. (Asteraceae). D. J. SCHNEIDER, JENNIFER R. GREEN and M. G. COLLETT Parar.Jarla bovicola The control of Para filaria bovicola transmission in South Africa. E. M. NEVILL, C. A. WILKINS and G. ZAKRISSON.... The colonization and life-cycles of Musca lusoria, Musca xanthomelas and Musca nevilli, vectors of Parafilaria bovicola in South Africa. E. M. NEVILL and B. SUTHERLAND Paramyxovirus The isolation of a paramyxovirus from pigeons in South Africa. ANNA C. E. PIENAARand J. A. C!LL!ERS..... Pasteurella baemolytica Antibiotic sensitivity of Pasteurella hljemolytica isolated by means of a fibreoptic endoscope from cases of pneumonic pasteurellosis in cattle. S. R. VANAMSTEL, MARYKEHENTON, M. A. WITCOMB, B. FABIAN and P. VERVOORT.... Pathogenesis of heartwater The pathogenesis of heartwater. J. L. DUPLESSIS, LETITIA MALAN and Z. E. KOWALSKI Pathology of heartwater The pathology of heartwater. III. A review. L. PROZESKY The clinical pathology and pathophysiology of heartwater. A review. S. R. VAN AMSTEL, A. J. GUTHRIE, F. REYERS, H. BERTSCHINGER,P. T. 0BEREM, V ALERIEM. KILLEEN and 0. MATTHEE..... Pathophysiology of heartwater Cowdria ruminantium: stability and preservation of the organism. L. L. LOGAN Pennisetum clandestinum pastures Parasites in sheep grazing on Kikuyu (Pennisetum clandestinum) pastures in the winter rainfall region. R. K. REINECKE, R. KIRKPATRICK, LYD!ASWART, ANNAM. D. KR!ELand F. FRANK Pheromones Tick pheromones. R. GOTHE.... Physodine Cardiac glycoside poisoning in sheep caused by Urgineaphysodes (Jacq.) Bak. and the isolated physodine. A. P. W. NEL, R. ANrrRASCULTZ, P. JORDAAN,L. A. P. ANDERSON, T. S. KELLERMAN and CLARE REID Pig abattoirs Leptospirosis as a cause of ''white spot'' kidneys in South African pig abattoirs. PAMELA HUNTER, F. H. van DER VYVER, ANNESELMER-OLSEN,MARYKEM. HENTON,S. HERRandJ. F. DELANGE.... Pigeons The isolation of a paramyxovirus from pigeons in South Africa. ANNA C. E. P!ENAARand J. A. CILL!ERS.... Pigs African swine fever. II. Functional disturbances of thrombocytes in pigs infected with virulent haemadsorbing and nonhaernadsorbing virus isolates. J. A. NESERand C. KoTZE Fre?J~:~A irm~~~c:rt~kz.::~jo:c~~uhg~~~~~.. i~.~~.. ~~t.. ~:. ~~.~. :~~:.~~.. i~~~.~~~~.. ~~.~t s.~~.~~~~. ~~.~~.. ~~~~.~~ : Pneumonic pasteurellosis Antibiotic sensitivity of Pasteurella hljemolytica isolated by means of a fibreoptic endoscope from cases of pneumonic pasteurellosis in cattle. S. R. VAN AMSTEL, MARYKEHENTON,M. A. WITCOMB,B. FABIAN and P. VERVOORT..... Prophylactic regime De;:~t~~!te~~eaJ~~~a~:i~~~~ ~~~~~:!~EL~.~~~~~~~.~.~.t.~. ~.~~i.~t. i ~ ~~~. ~~~~~.~~i.~~.. ~:. ~.~~~~~~!~.~~~~~. ~~t.~ Pnlmonary artery pressure Broiler pulmonary hypertension syndrome. II. The direct measurement of right ventricular and pulmonary artery pressures in the closed chest domesticfowl. A. J. GUTHRIE, J. A. C!LL!ERS, F. W. HUCHZERMEYER and VALERIE M. KILLEEN {i {i

10 Rabies vaccine Antibody response in cank to oil cmubion rabies and.:phemaal fever vacl ine~. C. M. C A:.lERU._. B. J. H. BARNARD. ER~A ERASMUS and W. J. S. Bolli.'\ Rafuxanide Two tield strains of HacmunciiiH conlortus resislanl Ill ral\nanidc. J. A. VA:-.1 WYK. f'. S. MALA/\. H. M. GERBER and REUI~."'. M. R. ALVES Reacting animals Theorel.ica! a s ~cl s oflhe enzyme~linked im~un(~so rbenl as~ay l~chnique and its use.in the deleclion of_cm\'dria rumirum IIUIII antigen and antibody tn rea<.lmgammah. G. J. VII.JOE:\. N. M. J. VER\IELU:Nand A. W. H. NEIIZ.... Rearing techniques An investigation into the clinical pathological changes and serological response in horses e~perimentally infected with Bahnia <'<fill and IJ<~nnia calwlli. 1). T. Ill, W \Al.. J. \':\:" Hl~RDE:" ami f. T. PUTUIEHR Reservoir status of heartwater The reservoir status <If goals n:cuvered from heanwater. N. BARRE and E. (A\Il'S.. Resistance to antibiotics Resistance to various antihiotics of Salmonella and Es, hcrichia coli isulat<:d from rcgislrahle farm feeds. AN:-IE'ITE M. l)l%\~1>. MARIE Lll he B1\R NARD. ~AKTHA L. SWAN I: I~JU. and MARIE :VI ENGELIIRECHT Resistance to heartwater The non-specific resistam:e of canle to heartwater. J. L. Dl ' I'LI:SSIS and LE'I IT I:\ MAlA~... Rickettsias :0.1etah(llism and genetic~ nl Chlamydias ami Rickett~ i as. J. C. WJLLIA~1S and ~. H. VUDKII' Right ventricular pressure Broiler pul.nh~nary hy~nc~~ion sy ndron~e,: H. The direct nu:a~urcr;1cnt of r~~ht ventric ular and pulmonary artery pressures in the do~~d ~ hest dnmcstrc fowl. A. J. GL I HRII;. J. A. (J LLII: R~.I. W. Hll HLI:R:'>! :) l:r and V :\LI:RIE M. KILLE~. :>I Routes for infection The cffi~ac\' of alternative routes fur the infection or va<:cination of animals with Cowdria rumirwmium. J. D. BlLUIDE"' HUUT. J. A. OU\'IER. B. GRL'S:) and J. V. BADU\HOKST Routes fur vaccination The efficacy of ahemative routes for!he infection or vact:inatiun of animab with Cowdria rumirwmium. J. D. BlZU I DE~ HOUT. J. A. OLIVJJ:R. B. GRLISSand J. V. BADEt>i!IORST Rhipicephalus evertsi evertsi The transstadial transmission of Bahesiu caballi by Rhipin'phalu.\ evemi Cl'n!Ji. D. T. Dlo W,\ AL and f'. T. POTUIETLR... Ruminants The diagnosis of heartwater at posl monem in ruminants and the contirrnation of C uwdria ruminullliwn in tnice. L. f'ruzesky ,... Salivary glands Ultrastructural features uf Cuwdriu nmrinamium in midgut epithelial cells and salivary glands for nymphal Amblwmu11a hehraewn. KATiiEKISE M. Koc.-.:-~. J. D. Bc7 L' IllENHOl'T and ALET II ART Bi(X'hemkal studies of the salivary glands and haemolymph of Amblyomma hebrw:r1m. A. W. II. NUTZ and~- \-1. J. VERMf'l'LJ:: Salmonella Resistance to various antibiotics of Salmrmella and E.H"herichia coli isolated from registrable farm feeds. AN:>ii:TTI: M. DliR,\~ll. :0.1 \RIE LUSE BAR:>!ARO. MAR IliA L. SWA:-li:I'OEL and MARl]; M. ENc;EUlRECHT Santalaceae E~pe~imenta l ~viden.:e tha~ the a.:tivc ~rinc!p1e of ~he. poisonou~ ~I an! Th~sium Jirw~mmr L. f. ~ Samalaceae) i~ a bufadicnolidt. L. A. P Ar"DLKSU ~. J. P. J. JOl Ucl< I. R. A. I I R\ Sl l Ll ~.. f. S. KELLER\1A~ and BAREl'ODit'iA J. Plio:' MAR Schistosoma haematobium EnLym~ <:l<:ctrnph<>re'l' of South Afri,:an Schislo.wmu lluhiheei and S. hat matobium. f. J. KRliGEK... Schistosoma mallheei Entymc electrnphorc,is of Soulh.African Schislo.wmw 1/uHihee/ and S. iutemalobium. F. J. KR UUI:R. The rx:currcnce of Schis1u.wmu matlhct i in the south-western Transvaal. I'. H. JUL'BERT. V. L. HA:-,tlLTU~-Anw ar.. and F. J. KRUGER Sl!asonal abundance of hlow-nies Seasonal abundam;e (If carrion-frcyuenting blow-t1ies 1 Diptera: Calliphoridae) rn the Kruger 1'atiunal Park. L. E. 0. BRA,\l'Kand V. OEVOS Serological relationship Th~ 'erological rclation,hip between Cm\'/Jria rumirrwrtiwn and -.certain memhcrs of the genus t.'hrlichia. C. J. Hot.LA.Sl>. L. L. LUCiAN. C. A.l\lEIIUSand \1. RISIK lahstractonly) Serum agglutination test A rapid microtitration ~crum agglutination te~t fnr the detel tion of contagious equine metritis antibodies. B. GL'MMOW. S. HERR and 0. L. BRETJ'..... Sesquiterpene ladone The development of an ELISA-assay fur serni ljuantitalive detection of uihydrogrie ~enin. a sesyuiterpene lactone from Cieif!,eria. J. A. VERSCHUOR. L. BUR:"~ la~ and "J. M. ]. VER.\IH'LEK... Sheep Parasite~,in she~p grazingv.~m Kiku ~ u rp:nrrise/umdarrdestinum) pastures in the winter ramfall region. R. K. REINECKE. R. KIRK!.\ I KKK. L) OI:\ S \RT. A"'KA l\1. D. KRILL anu F. fra:->k lmmunitatron uf ~ hccp against!he larval stat:e of Tae11iu mulliceps. AN~ A VERSTER and R. C. Tl'STIN..... A f{~~~~~a7. in.v~~tj~ation i.ntu.lh_e d~ca_cy. ~f l~tra~ri.iu~.eal. v a_cc.i~ati.o~ _o~. sheep. an~.g~at. kid.s.aga.in,t. he;t~~ate ~.. L:. ~ : f>axe ~l -26.\33 J)(J JOJ 87-lJ~ 645-{)50 ljj-ljt) t){)j-{)05 5<JI 5lJ7 JJI-JJJ lj7-lj8 1-4 ~

11 Cardiac glycoside poisoning in sheep caused by Urgineafhysodes (Jacq.) Bak. and the isolated physodine. A. P. W. NEL, R. ANITRASCULTZ,P. JORDAAN, L.A. P. ANDERSON,. S. KELLERMAN and CLARE REID Skin The relationship between the skin and some bacterial species occurring on it in the Merino. B. C. JANSEN and MARIANNA HAYES Specific immunity Specific immunity in farm animals to heartwater. C. G. STEW ART Specific immunity in mice to heartwater. C. G. STEWART Stability of Cowdria Cowdria ruminantium: stability and preservation of the organism. L. L. LoGAN Staphylococci Some features of coagulase positive staphylococci from bovine milk. ll. Comparison of conventional techniques and the API staph system. J. A. ERASMUS,P. A. I. BRAND and MARIONM. M. GALBRAITH Sweating sickness Further studies on the clinical pathology of sweating sickness in cattle. S. R. VAN AMSTEL, F. REYERS, P. T. OBEREM and 0. MATTHEE Sylvicapra grimmia Parasites of South African wildlife. 1. Helminths ofbushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal. J. BOOMKER, M. E. KEEP and I. G. HORAK Taenia multiceps Immunization of sheep against the larval stage of Taenia multiceps. ANNA VERSTER and R. C. TUSTIN Taxonomic status of Cowdria The taxonomic status of the causative agent of heartwater. G. R. ScOTT Terramycin!LA De;~~=~~~ ~fr/rittzal.a~~~~fu~t~~~.~.~~~~~.i~.~ ~~.~~~~~~.~.t.~~. ~~~~~~~~~~ ~~.~~~.~:.t.i~~~.~~~~. ~~~~ ~~~.~~~ Tbesium lineatum Experimental evidence that the active principle of the poisonous plant Thesium lineatum L.f. (Santalaceae) is a bufadienolide. L.A. P. ANDERSON,]. P. I. JOUBERT, R. ANITRASCULTZ, T. S. KELLERMAN and BARENDINAJ. P!ENAAR.... Thrombocytes African swine fever. ll. Functional disturbances of thrombocytes in pigs infected with virulent haemadsorbing and nonhaemadsorbing virus isolates. J. A. NESERand C. KOTZE Ticks Tick transmission of Anaplasma centrale. F. T. PoTGIEI'ERand L. VAN RENSBURG Morphology and development of Cowdria ruminantium in Amblyomma ticks. K. M. KOCAN and J. D. BEZUIDENHOUT.... Heartwater: The development and life cycle of Cowdria ruminantium in the vertebrate host, ticks and cultured endothelial cells. L. PROZESKY and I. L. DUPLESSIS The tick vectors of Cowdria ruminantium (Ixodoidea, Ixodidae, genus Amblyomma) and their distribution. JANE B. WALKER, with illustrations by A. OLWAGE Danger of introducing heartwater onto the American mainland: Potential role of indigenous and exotic Amblyomma ticks. N. BARRE, G. UILENBERG,P. C. MORELand E. CAMUS Tick pheromones. R. GOTHE The control of heartwater by means of tick control. J.D. BEZUIDENHOUT and R. D. BIGALKE Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores. I. G. HORAK, AMY JACOT GUILLARMOD, L. C. MOOLMAN and V. DEVos Tragelapbus scriptus Parasites of South African wildlife. 1. Helminths ofbushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal. J. BOOMKER, M. E. KEEP and I. G. HORAK Transmission of Para filaria bovicola The control of Parafilaria bovicola transmission in South Africa. E. M. NEVILL, C. A. WILKINS and G. ZAKRISSON Treatment of Heartwater The treatment of heartwater. S. R. VAN AMSTEL and P. T. 0BEREM Urginea pbysodes Cardiac glycoside poisoning in sheep caused by Urginea physodes (Jacq.) Bak. and the isolated physodine. A. P. W. NEL, R. ANiTRASCHULTZ,P. JORDAAN,L. A. P. ANDERSON, T. S. KELLERMAN and CLARE REID Vaccination The production of heartwater vaccine. P. T. OBEREMandJ. D. BEZUIDENHOUT The infection and treatment method of vaccination against heartwater. LENTE van DERMER WE The block method of vaccination against heartwater. I. L. ou PLESSIS and LETITIA MALAN The efficacy of alternative routes for the infection or vaccination of animals with Cowdria ruminantium. I. D. BEZUIDEN- HOUT,J. A. OLIVIER, B. GRUSSandJ. V. BADENHORST A rr~~~~:.. ~~.~~~-t~~~~~~~.i.~~~- ~~.~.~:~~~-~~. ~~ _i~~~~-t-~~-~~~. ~~~~~~~~~~~ -~~- ~~~~:. -~~~.~~~~ -~~-~ -~~~i-~~~. ~~~~~~-~ - ~:. ~ : Vaccine Antibody response in cattle to oil emulsion rabies and ephemeral fever vaccines. C. M. CAMERON, B. I. H. BARNARD, ERNA ERASMUs and W. I. S. BOTHA The production of heartwater vaccine. P. T. OBEREM and J.D. BEZUIDENHOUT Ventricular mass Broiler pulmonary hypertension syndrome. I. Increased right ventricular mass in broilers experimentally infected with Aegyptianella pul/orum. F. W. HUCHZERMEYER, I. A. CILLIERS, CELESTINA D. DIAZ LAVIGNE and R. A. BARTKOWIAK M M

12 Vertebrate hosts Heartwater: The morphology of Cowdria ruminantium and its staining characteristics in the vertebrate host and in virro. L. PROZESKY......, " Heartwater: The development and life cycle of Cowdria ruminantium in the vertebrate host, ticks and cultured endothelial cells. L. PROZESKYandJ. L. DUPLESSIS % Virus A single dilution enzyme-linked immunosorbent assay for the quantitative detection of antibodies to African horsesickness virus. R. WILLIAMS African swine fever. II. Functional disturbances of thrombocytes in pigs infected with virulent haernadsorbing and nonhaemadsorbing virus isolates. J. A. NESER and C. KOTZE The identification of factors capable of reversing the core-mediated inhibition of the bluetongue virus transcriptase. ALBER- DINA A. VAN DUK and H. HUISMANS Wild animals Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores. I. G. HORAK, AMY JACOT GUILLARMOD, L. C. MOOLMAN and V. DEVOS Wild carnivores Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores. I. G. HORAK, AMY JACOTGUILLARMOD, L. C. MOOLMAN and V. DEVos Wild hosts oflxodes Some wild hosts of the Karoo paralysis tick, Ixodes rubicundus Neumann, 1904 (Acari: Ixodidae). I. G. HORAK, L. C. MOOLMAN and L. J. FOURIE Wildlife Parasites of South African wildlife. 1. Helminths of bushbuck, Tragelaphus scriprus, and grey duiker, Sulvicapra grimmia, from the Weza State Forest, Natal. J. BOOMKER, M. E. KEEP and I. G. HORAK Welcoming address Welcoming address to the workshop on heartwater: past, present and future. F. J. van DERMER WE "White spot" kidneys Leptospirosis as a cause of "white spot" kidneys in South African pig abattoirs. PAMELA HUNTER, F. H. van DER VYVER, ANNESELMER-0LSEN,MARYKEM. HENTON,S. HERRandJ. F. DELANGE Zebras Studies on the parasites for zebras. V. Nematodes of the Burchell's and Hartmann's mountain zebras from the Etosha National Park, South West Africa/Narnibia. ROSINA C. SCIALDO-KRECEK, R. K. REINECKE and F. S. MALAN Description of incisors of known-age Cape mountain zebras, Equus zebra zebra from the Mountain Zebra National Park. B. L. PENZHORN