03/01/2018 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
03/01/2018 The District by the Numbers 10,000 water sources 12 full time 50 summer and 65,000 catch employees employees basins surveyed and treated each year. Board of Budget of $ 3 ~750,000 people million annually Trustees served by NWMAD ~ $ 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
03/01/2018 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
03/01/2018 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
03/01/2018 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
03/01/2018 West Nile Virus Transmission Cycle WNv History Human Cases West Nile Virus in NWMAD • First appeared Cook County 45 in bird and mosquitoes 2001, 1 st human case 2002 40 Number of Human Cases • Cook County – 1223 cases, 35 65 deaths 30 • Illinois – 2214 cases, 124 25 deaths 20 • US – 43,937 cases, 1911 deaths 15 Most human cases appear in late 10 July – October 5 0 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Year 6
03/01/2018 WNv Signs, Symptoms and Treatment Brain infection – tremors, paralysis, seizure, coma <1% 10% of people with CNS will CNS die Flu‐like symptoms, fever and aches. People at greatest risk of Usually complete serious WNv infection are ~20 % WNv recovery those over 65, Fever immunocompromised or other serious health conditions No disease symptoms ~ 80 % Asymptomatic What can you do to reduce mosquitoes in your yard? • Don’t let water stand in your yard for more than 5 days 7
03/01/2018 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
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