The state begins a second round of aerial spraying in southeastern Massachusetts Monday evening, as tests continue to show large numbers of mosquitoes carrying Eastern equine encephalitis.
It's relatively rare to have to do more than one aerial spraying, but the Department of Public Health's Kevin Cranston says there are six towns where the EEE risk for humans is still high.
"Mosquitos are constantly breeding in the environment," Cranston said, "especially those feed on the birds. There is a very high level of virus in the mosquitoes that we are detecting and that is one of the reasons for concern."
Cranston said state health officials continue to investigate why EEE-infected mosquitoes were detected a month earlier than usual.
The spraying is scheduled to begin after 7 p.m. in Bridgewater, West Bridgewater, Easton, Norton, Raynham, and Taunton.
This program aired on August 13, 2012. The audio for this program is not available.