The mosquito-borne virus killed 7 people in the New York region last year and made 55 others seriously ill.
There have now been 14 cases of the mosquito-borne virus in the city, including one fatality.
The mosquito-borne virus can cause deadly brain swelling in a small number of infected people.
It was put down 72 hours later, three days before blood tests came back positive for the mosquito-borne virus.
Incidence of infection is closely linked to vector activity, for example, mosquito-borne viruses are more common in the summer.
No human cases of the mosquito-borne virus have been reported so far this year.
West Nile is a mosquito-borne virus that killed 7 people and infected 62 others in the New York area last year.
West Nile virus could follow the course of another mosquito-borne virus.
He was the first fatality in New York this year of the mosquito-borne virus.
Most cases of encephalitis result from viral infection, especially by a mosquito-borne virus.