 West Nile virus has been detected in eight Connecticut towns so far this year. The Connecticut Agricultural Experiment Station says six of the towns where infected mosquitoes are in Fairfield County. They are Bridgeport, Darien, Greenwich, New Canaan, Norwalk and Stamford, with the others in New Haven and Wethersfield. State public health officials are warning residents of the increasing risk of West Nile and urge people to avoid mosquito bites.