State health officials are confirming a fourth case of Eastern equine encephalitis in Massachusetts.
The Department of Health said Thursday the Plymouth County man in his 60s is hospitalized.
Officials also announced a 14th case of West Nile virus, in a Hampden County man in his 50s who has been discharged from a hospital.
Both illnesses are carried by mosquitoes.
A Worcester County man in his 70s died of EEE last month.