This is Science Today. Since tuberculosis is rampant
in much of the developing world and immigration from
these countries to the U.S. is at an all-time high,
public health officials have called for large-scale
TB screening programs in cities with large immigrant
communities and at national borders. Joel Ernst, an
infectious disease specialist at the University of
California, San Francisco says tourism has also caused
a resurgence of TB in this country.
Ernst: And so as we become a globalized human
population, the exposure and the likely risk of tuberculosis
is substantially greater than when we were largely
staying at home on the north American continent.
Narrator: Although the development of anti-tuberculosis
antibiotics in the Fifties caused TB to fall from
the American consciousness, it never really went away
in the rest of the world.
Ernst: In the developing world, tuberculosis
is still incredibly prevalent and at least an estimated
three million people a year die of tuberculosis. So
this is really a disease that never really went away.
Narrator: For Science Today, I'm Larissa Branin.