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An examination of the effect of aerosolized Permanone insecticide on zebra finch susceptibility to West Nile virus

West Nile virus (WNV) is maintained cryptically primarily in avian (passerine) populations, where it is transmitted by Culex spp. mosquitoes. Mosquito‐control measures currently include physical activities to reduce mosquito‐breeding sites and the application of mosquito larvicides or aerosolized in...

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Bibliographic Details
Published in:Environmental toxicology and chemistry 2017-12, Vol.36 (12), p.3376-3386
Main Authors: Jankowski, Mark D., Moore, Murray E., Hofmeister, Erik K.
Format: Article
Language:English
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Summary:West Nile virus (WNV) is maintained cryptically primarily in avian (passerine) populations, where it is transmitted by Culex spp. mosquitoes. Mosquito‐control measures currently include physical activities to reduce mosquito‐breeding sites and the application of mosquito larvicides or aerosolized insecticides to kill adults (adulticides) when arboviral diseases such as WNV or Zika virus are detected in mosquito populations. Organochlorine, organophosphorus, carbamate, and pyrethroid insecticides are often used. Previous work suggests an effect of pyrethroids on the immune system in a variety of vertebrates. We examined the effects of exposure to aerosolized Permanone® 30:30 insecticide (permethrin and piperonyl butoxide in soy oil vehicle) at approximately 103 to 106 times potential environmental concentrations on the response of captive zebra finches (Taeniopygia guttata) to experimental challenge with WNV. Compared to vehicle control birds, WNV outcome was unchanged (65% of birds produced a viremia) in the “low” exposure (9.52 ± 3.13 mg/m3 standard deviation [SD] permethrin) group but reduced in the “high” exposure (mean 376.5 ± 27.9 mg/m3 SD permethrin) group (30% were viremic; p 
ISSN:0730-7268
1552-8618
DOI:10.1002/etc.3918