Tdrell
Here is from the CDC

complex (MAC, Avian Tuberculosis)
MAC is a bacterial disease spread to people from birds and other animals through the environment. Affected birds can become depressed, thin, and weak, and might have diarrhea. Birds carrying this disease shed large amounts of the bacteria into the environment.

Experts believe that people get MAC through exposure to the bacteria in the environment, though it is not clear exactly how the bacteria are transmitted. This disease primarily affects people with a weak immune system. Affected people might lose weight, have abdominal pain or diarrhea, and be anemic or feel tired.

So I'm not sure....it does say they arn't sure how it's transmitted.
I do think the main source is water but may want to take precautions around birds.
Shari