CONCORD — A Kingston man has tested positive for two diseases transmitted by infected bugs, state health officials said.

The man, who spends a lot of time outdoors and had not recently traveled outside the state, tested positive for Jamestown Canyon virus (JCV) and Powassan virus (POW), the Department of Health and Human Services said.

JCV is transmitted by infected mosquitoes and, in most cases, have mild symptoms.

POW is transmitted by infected ticks. While some people experience mild symptoms, the disease can infect the central nervous system and cause brain inflammation, which can be fatal.

“From spring until fall, New Hampshire residents and visitors are at risk for a number of different infections from the bite of mosquitoes and ticks, and this case highlights the risk from both,” said state epidemiologist Dr. Benjamin Chan.