Domestic cats are highly susceptible to plague. These animals also are known to have been sources of Y. pestis infection for humans.
Transmission from cats to humans:
Bites or scratches.
Direct contact with infectious exudates.
Inhalation of infectious respiratory droplets.
Cats that are allowed to roam freely also can become infested with Y. pestis-infected rodent fleas and transport these fleas into home environments.
Cat-associated human cases were first verified in the U.S.
in 1977. Since that time, 25 human cases have been associated
with exposure to Y. pestis - infected cats. Of these,
7 occurred in veterinarians or their assistants, and 5 presented
as primary pneumonic plague, which is a particularly dangerous
form of the disease that can be transmitted from human to human
through coughing and respiratory droplet spread.