Photo: National Institute of Allergy and Infectious Diseases
By Sam Borcia | Lake & McHenry County Scanner
Health officials said Wednesday they are warning the public after a batch of mosquitoes tested positive for West Nile virus for the first time this year in McHenry County.
A mosquito “pool,” also known as a batch of mosquitoes, was sampled on Friday in Fox River Grove and later tested positive for West Nile virus.
The McHenry County Department of Public Health (MCDH) said this mosquito pool is the first confirmed indicator of West Nile virus presence in McHenry County in 2026.
No human cases of West Nile virus have been reported in McHenry County this year so far.
Report continues here.