Introduction to Northwest Mosquito Abatement District Patrick Irwin, MS. PhD. Entomologist NWMAD 147 W. Hintz Rd. Wheeling, IL 60090 1 847 537 2306 nwmadil.com Northwest Mosquito Abatement District Formed 1956 242 square miles served 1
The District by the Numbers 12 full time employees 50 summer employees 10,000 water sources and 65,000 catch basins surveyed and treated each year. Board of Trustees ~750,000 people served by NWMAD Budget of $ 3 million annually ~ $ 3 dollars per 100,000 of property value Mission of NWMAD Manage mosquito populations that inhibit peoples ability to enjoy the outdoors and/or mosquitoes that can carry and transmit diseases to humans. Use integrated pest management (best management practices) to manage mosquito populations. These include: adult and larvae mosquito surveillance, larval abatement, adult treatment, mosquito habitat source reduction and public education. 2
District Response to WNv Larval surveillance and abatement in over 10,000 aquatic sites, inspections and treatment of over 65,000 storm water catch basins. 39 adult mosquito traps run 7 days a week throughout the district Vector mosquitoes tested for WNv in lab Adult treatment if nuisance mosquitoes > 35 per trap for 3 straight days or WNv detected 2 consecutive days from same trap. Centers for Disease Control and Prevention Grant. 5 year collaboration between academic institutions, public health departments and mosquito abatement districts. Increase surveillance and understanding of mosquito and tick borne disease. Loyola University, Northshore MAD NWMAD Efficacy of storm water catch basin abatement. Michigan State, University of Maryland, NSMAD, NWMAD Genetic markers for subterranean mosquitoes and ability to transmit WNv. University of Wisconsin, University of Illinois, NSMAD and NWMAD Efficacy of larvicide and adulticide on mosquito biting rates. 3
Questions? NWMAD 147 W. Hintz Rd. Wheeling, IL 60090 1 847 537 2306 nwmadil.com Zika Virus The mosquito species that spread Zika virus are not found in the Chicago area, but can occur in southern Illinois. The district does monitor for this species in case there is an introduction. 80% of people infected with Zika do not get ill. Women who are pregnant, or thinking of becoming pregnant, should consult their physician before traveling. Local transmission has occurred in southern Florida and Texas in 2016. Only one local transmission case in 2017 (Texas) 4
District Adult Mosquito Traps Mosquito Facts ~ 30 species of mosquitoes in our district 2 main types of mosquitoes Floodwater most common nuisance biter of humans Disease vector carries West Nile virus Only females take blood 5
West Nile Virus Transmission Cycle WNv History First appeared Cook County in bird and mosquitoes 2001, 1 st human case 2002 Cook County 1223 cases, 65 deaths Illinois 2214 cases, 124 deaths US 43,937 cases, 1911 deaths Most human cases appear in late July October Number of Human Cases Human Cases West Nile Virus in NWMAD 45 40 35 30 25 20 15 10 5 0 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 Year 6
WNv Signs, Symptoms and Treatment Flu like symptoms, fever and aches. Usually complete recovery No disease symptoms <1% CNS ~20 % WNv Fever ~ 80 % Asymptomatic Brain infection tremors, paralysis, seizure, coma 10% of people with CNS will die People at greatest risk of serious WNv infection are those over 65, immunocompromised or other serious health conditions What can you do to reduce mosquitoes in your yard? Don t let water stand in your yard for more than 5 days 7
Mosquito larvae How can you reduce mosquito bites? Wear long sleeves/pants when outdoors Avoid being out at dusk and dawn Wear insect repellent when mosquitoes are present 20 % DEET, Picaridin, Oil of lemon eucalyptus Drought conditions are favorable for WNv vector mosquitoes. 8