State health officials say West Nile virus has been found in mosquitoes trapped in Biddeford and Scarborough. State Epidemiologist Dr. Stephen Sears said Thursday the confirmed positive results came from routine surveillance of monitoring pools in northern York County and southern Cumberland County. The terrain at the two new sites is similar to where West Nile was found earlier in Gorham and Standish. The Portland Press Herald, reports there have been no instances of West Nile or the more dangerous mosquito-borne disease Eastern equine encephalitis infecting humans in Maine this summer. Sears urged residents to prevent mosquito bites by avoiding the outdoors from dusk until dawn, if possible: wear loose-fitting long-sleeved shirts and pants: and use insect repellants. People infected with West Nile often experience flu-like symptoms.