Tularemia is a zoonosis, an infection which can be spread from animals to humans. It can also be waterborne, airborne or contracted via insect bites. Person-to-person transmission has not been documented. Tularemia is caused by the bacterium Francisella tularensis which can infect many animals, especially small rodents, rabbits and hares, and also domestic cats.
Attempts have been made to weaponise tularemia focusing on the airborne dispersal route.