State health officials say a 2-year-old horse from Atlantic County that contracted West Nile virus was euthanized.
It's the first reported case in a horse in the state this year. There was only one case in 2009 in New Jersey and none was found in 2008.
Health officials say the horse was never vaccinated against the mosquito-borne virus.
West Nile affects horses' neurological systems. It cannot be spread from horse to horse or from an infected horse to humans or domestic pets.