It’s sad when a pet gets sick, but even worse when a pet gets its owner sick. Dr. Lee dives into the diseases that pets can pass on to humans such as ringworm, rabies, leptospirosis, parasites, protozoal infections, bacterial infections, and even the plague. Some of these less common zoonotic diseases can be fatal. While they are not common, there is a possible risk of transmission to you and your human family. But by knowing how to keep your dog and cat healthy and on appropriate preventive medicine, the risk is low.