The first mosquito batch this year in Westchester to test positive for West Nile Virus is in Rye, an official from the county’s Health Department said this morning. The mosquito pool was reported on July 22.

There have been no human cases of West Nile virus in the county this season.

The county Health Department will continue with mosquito surveillance efforts throughout the county, as well as in the area where the positive mosquito batch was found. These efforts will include mosquito trapping and testing as well as surveying catch basins for mosquito larvae or standing water. No spraying is planned at this time, officials said.

“It is particularly important that residents remain vigilant in their efforts to reduce their risk of West Nile virus, particularly now, during peak mosquito season,” said health commissioner Dr. Joshua Lipsman.

The Health Department recommends that residents take the following precautions:

• Avoid being outdoors in the late afternoon and early evening when mosquitoes are active and feeding.

• Use insect repellents with no more than 30% DEET (N, N-diethyl-meta-toluamide) when outdoors in such areas at those times. Products containing DEET are not recommended for use on children under 2 months of age. Insect repellents should be used especially at dusk and evening hours when mosquitoes are most likely to bite. Be sure to read and follow the manufacturer’s directions for use.

• Wear protective clothing such as long pants, long-sleeved shirts, and socks when outdoors in areas and at times where and when mosquitoes are active and feeding.