Tuberculosis: What Is TB?

The recent airplane flight of a Georgia man infectedThe CDC suggests that you should be tested for TB
with tuberculosis has raised many new questions andif:
concerns about the disease. The Center for Disease*You have been exposed to a person known to or
Control (cdc.gov) serves as a great resource forsuspected to have active TB;
explanation of this disease.*You have an HIV infection or other condition
According to the CDC, tuberculosis, commonlyelevating your risk for TB;
referred to as "TB," is a disease caused by the*You are from an area where active TB is common
bacteria Mycobacterium tuberculosis. This bacterium(most Latin American countries, the Caribbean, Africa,
usually attacks the lungs but can also attack theAsia, Eastern Europe and Russia);
kidney, spine and brain as well. If not treated*You inject illegal drugs; or
properly, TB can be fatal.*You live somewhere in the United States where
Those with active TB can spread the diseaseactive TB is more common (homeless shelters,
through the air by coughing or sneezing; however,migrant farm camps, prisons or jails and some nursing
not everyone infected with TB becomes visibly sick.homes).
Those infected with latent TB show no signs ofA simple skin test or blood test will reveal if a person
illness and cannot pass the disease to others. Still,is TB-positive. These skin tests can be easily
latent TB may become active TB if not treated.performed at the health department or at most
According to the CDC, there was a sharp decline indoctors' offices. The procedure includes injecting a
TB cases during the 1940s, as scientists discoveredsmall amount of testing fluid called tuberculin directly
effective treatments. In the '70s and '80s, however,under the skin of the forearm. Within 2-3 days
TB control efforts were neglected, resulting in aswelling may occur where the tuberculin was
spike in TB cases from 1985 to 1992. Cases of TBinjected, and the patient should have a doctor or
steadily declined after 1992, but the disease remainsnurse measure the swelling.
a current problem within the United States.If the patient is unaware of past encounters with an
In 2003 more than 14,000 cases of TB wereinfected person, other tests will be performed to
reported. Additionally, 2007 marked an all-time low indetermine whether the TB is active or latent. Chest
the number of TB cases reported, but also showed ax-rays, phlegm tests, blood tests and urinalyses may
slow-down in the decline of TB cases.be necessary.