Tests have found eastern equine encephalitis in bird-biting mosquitoes in Chester.

Connecticut Agricultural Experiment Station official Theodore Andreadis says he has some concerns.

“We have our first detection of Eastern Equine Encephalitis this summer,” Andeadis said. “This is fairly significant, because it is the earliest we have ever detected the virus in mosquitoes.”

Andreadis says the virus usually does not arrive in the state until September or early October.

Andreadis says there is a lot of eastern equine encephalitis activity in other nearby states this summer, including Massachusetts and New Jersey.