SANTA CRUZ, Calif., Oct. 20 (UPI) -- The spread of West Nile virus in the United States is linked to land use patterns and "super-spreader" animal species, a scientist says.
University of California, Santa Cruz, biologist Marm Kilpatrick, who studies the ecology of infectious diseases, said both the mosquitoes that transmit it and the birds that are important hosts for the virus are abundant in areas that have been modified by human activities.