Speculative possibility: she drank raw milk from an organic cow. Raw milk is much better nutritionally and digestively than the store-shelved pasteurized/homogenized white stuff, but it's also a very good tuberculin bacterium carrier, so unless the cow is kept squeaky clean inside and out, drinking the raw stuff puts one at risk for TB.
I didn't know that and to my knowledge all she knows is they don't know where she got it, they didn't suggest any source it could have been. I don't know if she drinks raw milk at her house but I don't think she does. I'll find out from someone who used to live with her. She drank regular milk at my house with her cereal at night.
I've become suspect in general of “fresh” veggies at the grocery. I'm trying to grow my own now. I'll know no one has touched them except me (no one with germs on hands touching them) and they have no chemicals sprayed on them and they haven't been in trucks forever to get to the grocery. I want my own tomatoes, not someone else’s, my own lettuce and every other veggie I grow.