By Alex Megerle
New York City has a large population of free-roaming cats, which can harbor and transmit zoonotic parasites. Some parasites shed by cats remain in the environment for long periods and infect pets, wildlife and humans. Researchers recently tested cats that were captured during a trap-neuter-return program in New York City and found that more than half were infected with at least one type of parasite; young male cats shed large nu…