A mosquito sample collected last week on North Military Highway in Norfolk has tested positive for the West Nile virus, the first such positive test in the city this season, according to the Norfolk Department of Public Health.

The Allegheny County Health Department on Monday confirmed that additional mosquito samples have tested positive for West Nile Virus. The health department will treat areas for mosquitoes in the communities of Hazelwood,

One mosquito sample, collected Friday along the 1000 block of North Military Highway, tested positive for the virus, according to the health department.