Philadelphia women and specific bacteria

Here's a very interesting article concerned the infection rates of MAC = mycobacterium avium complex.  It seems to be found most commonly in healthy, post menopausal, white women of higher socioeconomic status.  Oh, and in the Philadelphia area.  Doctors don't know why, but they're trying to figure it out.

http://www.newsworks.org/index.php/homepage-feature/item/54911?utm_source=Facebook&utm_medium=Social&utm_campaign=FBWHYY773