In the latest weekly update of mosquito activity, Mosquito Control’s entomology lab reported that Culex tarsalis mosquitoes — the species most responsible for human transmission of West Nile virus — are active in some of the highest numbers recorded this early.

The numbers of mosquitos most responsible for the transmission of West Nile virus to humans in Minnesota is among the highest ever recorded in the seven-county metro area, according to a recent update.

Following tests on mosquitoes for West Nile Virus, the Metropolitan Mosquito Control District reported that virus activity is increasing, earlier than usual.