MANCHESTER — Seven batches of mosquitoes tested last week tested positive for the West Nile Virus, according to the city Health Department.

The virus is transmitted through the bite of a mosquito that was infected by feeding on an infected bird, according to a release from the Health Department. The release said the risk for humans to contract the virus is low that in most cases people experience mild, flu-like symptoms.

“The finding of additional mosquitoes with (West Nile Virus) in the community is not unexpected,” city Public Health Director Jim Soucy said in a statement. “Since we anticipate finding additional positive mosquitoes over the next two months, all residents are encouraged to be vigilant in eliminating mosquito breeding areas and to take simple steps such as using effective mosquito repellent and wearing long pants and sleeves at dusk and dawn to prevent being bitten by mosquitoes.”