The Latest Buzz on Mosquitoes and Fluralaner

Transmission of heartworm (Dirofilaria immitis) from infected to naïve dogs depends on successful mosquito feeding and survival. Recently performed studies at The University of Georgia and Oklahoma State University demonstrate the effects on mosquitoes (Aedes aegypti) after feeding on blood from dogs given fluralaner. By 24 hours—but, at times, as early as 6 hours—after feeding on fluralaner-treated dogs, greater than 98% of mosquitoes were killed for a 12 week period. Meaning, survival of adult mosquitoes to a heartworm-infective age (~14 days) was significantly reduced if fed on fluralaner-treated blood. Additionally, egg production by fluralaner-fed mosquitoes was almost completely suppressed for the first 13 weeks following treatment. Altogether, these data suggest the reduction in the longevity and reproductive success of mosquitoes that take a bloodmeal from fluralaner-treated dogs may consequently reduce the local transmission of heartworm. Moreover, as heartworm prevalence increases across North America, these additional measures are warranted to limit spread by targeting the vector. Presented by: Merck Animal Health