NORWALK - A top state official says an unusually large number of mosquitoes already are making their presence known across the state, and that could mean a higher risk of the West Nile virus this summer.

Dr. Ted Andreadis, from Connecticut's Agricultural Experimental Station, says the insects grow in water and thrive in heat. 

Andreadis says the more dangerous West Nile virus carrier species, called the Culex Pipiens, will continue to multiply if the wet weather persists. He says they will likely be prevalent in July and August if it's hot.  Andreadis expects to see 50 different species carrying as many as nine viruses this summer in Connecticut.