Berks County has recorded its first case of West Nile virus this year.

A mosquito collected in Cumru Township on July 10 tested positive for the virus, the Pennsylvania Department of Environmental Protection announced Wednesday.

The DEP has collected 590 mosquitoes in Berks County so far this year, testing 166 of them for West Nile, officials said.

As of Wednesday, the DEP said Berks was one of four counties in Pennsylvania considered to be "low risk" for the virus. The other counties are Adams, Delaware and Luzerne.

All other counties currently under surveillance for West Nile are considered to be at a "remote risk."

Berks last year was the first county in Pennsylvania to record a case of West Nile virus in a mosquito. It was discovered in Exeter Township, the earliest ever in the state. The state has awarded the county a $53,310 grant for its West Nile program this year.