An additional mosquito pool in Boston has tested positive this week for West Nile Virus.
Tests performed on Tuesday confirmed a WNV-positive mosquito batch in South Boston for the first time this season.
Pools in Roxbury, East Boston, Hyde Park, Jamaica Plain and Roslindale tested positive for WNV earlier in the summer.
The alert level remains at moderate.
There have been no recorded human cases of mosquito-borne illnesses in Boston this year.
