TB had pretty much been eradicated in the U.S. until the hordes of unchecked, non-immunized third-worlders started streaming across the border in droves. Now TB cases are showing up all over the country.
Not only this but they're bringing with them the "new and improved" strain of TB that's impervious to much of the medication that was formerly used to fight it.
"More people in the developing world contract tuberculosis because of compromised immunity, largely due to high rates of HIV infection and the corresponding development of AIDS"
Tuberculosis [bottom of first paragraph]
(Lack of immunization is probably NOT a factor. I would guess that a far higher percentage of "third-worlders" have received the BCG shot.)
"The only currently available vaccine as of 2011 is bacillus Calmette–Guérin (BCG) which, while it is effective against disseminated disease in childhood, confers inconsistent protection against contracting pulmonary TB. Nevertheless, it is the most widely used vaccine worldwide, with more than 90% of all children being vaccinated. However, the immunity it induces decreases after about ten years. As tuberculosis is uncommon in most of Canada, the United Kingdom, and the United States, BCG is only administered to people at high risk."
(speaking as one who has personally administered hundreds of BCG immunizations and facilitated thousands more in East Africa.)
TB made a comeback in the late 1980’s, early ‘90’s due mostly to the HIV epidemic and deterioration of services for patients but I believe the numbers of reported cases at least have been consistently down since 2000.
We just had a case pop up in Roanoke, Va