The West Nile virus is transmitted from birds to mammals by mosquitoes, said Commissioner Rose. The Northern house mosquito is the most frequent carrier associated with the virus locally. The virus is rare, but in serious cases, it can cause encephalitis or flu-like symptoms. During an outbreak last year in the New York City area, seven people died and 62 people developed encephalitis. According to the state Health Department, dead birds, especially crows, were found in large numbers last year in areas affected by the outbreak.
Crows are particularly susceptible to the virus and are considered an important early warning sign.
Dead crows which show no obvious sign of physical injury should be reported to the county health department. Although crows seem to be particularly susceptible to West Nile virus, other types of birds can carry the infections. Reduce or eliminate all standing water. Dispose of tin cans, plastic containers, or similar water-holding containers. Remove all discarded tires on your property.