Just to join the discussion i think sometimes we can get carried away with prevention and protection from mycobacterium. We can filter our water pipes at home, then go to a restaurant and drink their water and use their ice cubes. We take a walk and pass water vapor from an air conditioner or a beautiful, decorative fountain. We work in our yard and get bacteria from the soil. There is no bubble. We should be cautious, but I don't think any of us truly know how we got our NTM.(non-tuberculosis mycobacterium). I got mine (Kansasii) years ago and was asked did I go to a foreign country. No-and I still have no idea how I got it while my husband and kids did not. I keep my faucets cleaned out and my shower heads, but I just went to a hotel when I went to Mayo. I doubt they cleaned their shower heads! So some prevention is good, but we have to live. I hope everyone is having a wonderful, fantastic weekend. I live in Florida and our weather today is awesome! Good wishes to all, Mary Jo