The Maricopa County Environmental Services Department is reporting 150 positive cases so far in 2023 — more than double the number reported last year.
The number of positive West Nile virus samples is increasing in Maricopa County, according to officials. The Maricopa County Environmental Services Department is reporting 150 positive cases so far in 2023 — more than double the number reported in all of last year.
The number of positive mosquito samples varies greatly each year — in 2021 there were more than 760 positive samples, while in 2020 there were just 10. The department has mosquito-trapping locations throughout the country that collect mosquitoes for testing. The mosquitoes are pooled together, by species, into groups of 1-50 mosquitoes before they are processed for diseases.Officials say West Nile virus is primarily spread through the bite of infected Culex species mosquitoes, which are found in Maricopa County and across the state. "These mosquitoes generally bite from evening to early morning so it is important to protect against mosquito bites whenever you are outside," officials say. The county has recorded 66 cases of West Nile virus so far this year, with a half-dozen confirmed deaths.The Environmental Services Department offers the following “4 Rs” tips to “fight the bite”:
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