[mlc9852]

From what I've read, it seems to be a fungal disease, though there is apparently no agreement within the medical community.

[Larousse2]

Question: do you possibly remember the old Gentian Violet of days gone by?

[Racer1]

I realize that, but to say it doesn't come from this or that doesn't help find the cause. From the following statement "While it's impossible to know how many Americans – who appear to be concentrated in California, Texas and Florida – suffer with the disease, the foundation says thousands with one or more symptom have registered with it" it would be a bad idea to assume that it wasn't brought in from Mexico or some other country.