I actually saw their idiot mayor on TV this morning claiming with an air of informed-authority (and a straight face) that the reason for this is that the "migrants" (ie illegals) are actually catching TB from the American citizens because they have much lower resistance to TB than we do, and that's because TB is nowhere near as prevalent where they came from as it is here.
That's right, it's our fault the illegals are catching TB because WE are infecting THEM...
Every time I hear him speak I can't believe they elected this moron, then I remind myself - oh yeah, they probably didn't.