Maine officials are working on a plan for protecting against mosquito-borne diseases. The Department of Agriculture, Conservation and Forestry was directed by lawmakers to develop the plan in cooperation with the Department of Health and Human Services. WMTW-TV says lawmakers are expecting results by December. The Maine Center for Disease Control and Prevention said this week that a second mosquito pool in York County has tested positive for Eastern equine encephalitis. West Nile virus also has been found in Maine birds in past years. State Rep. James Dill, who’s chairman of the Joint Standing Committee on Agriculture, Conservation and Forestry, said lawmakers want state agencies to create a threshold to be met to warrant a response such as pesticide spraying.