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Tuberculosis. - TB AIDS-defining opportunistic disease

Tuberculose (TB)

X-Ray scan human

It must be clarified that tuberculosis is a disease that defines AIDS.

As well? Sorointerrogativa every person diagnosed with TB should be tested (voluntarily) for HIV.

What is it?

Tuberculosis (TB) is a respiratory (lung) serious illness that can be life-threatening if not treated properly. TB is, in fact, the most common global disease caused by an infectious organism. Approximately 2 billion people worldwide are diagnosed with TB each year, a disease that is also responsible for the death of 3 million people annually.

In industrialized nations like the United States, TB was headed for extinction there 15 years ago. With the HIV epidemic, however, the rates of TB began to rise again among 1985 and 1992. Since 1992, the total number of TB cases decreased again. However, in certain groups of people in the United States - such as people immigrating to the United States coming from countries where TB rates are very high - the rate of TB is increasing. In 2000, had 17.531 TB cases. Although the number of TB cases continue to decline, it remains one of the most common causes of illness and death for US residents infected with HIV. In fact, TB is the number one cause of death of HIV-infected people across the globe involved.

A Mycobacterium tuberculosisThe bacterium which causes TB, spread from one person to another. Using microscopic droplets of fluid produced by the lungs, the bacteria can travel from the lungs of an infected person and be deposited in the lungs of someone close. Once within the lungs, the bacteria initiates infection. Although 150.000 people in the US have been infected with this bacterium, the majority (between 90% and 95%) have immune system healthy enough to prevent bacteria even cause TB. In people with HIV, the immune system may eventually lose control of bacteria, leading to infection to spread and cause disease. This process can take many months or years. In other words, Mycobacterium tuberculosis can remain alive in the body for many years for someone, but can only become active - for example, causing tuberculosis - once the immune system becomes damaged.

Tuberculosis usually because of respiratory system diseases. In HIV-positive people, especially those with counts below 4 CD200 cells, the bacteria can also infect the lymphatic system (eg, lymph nodes and spleen).

Compared to HIV-negative patients com Tuberculosis HIV-positive people with the disease may see their symptoms develop faster and with greater intensity. Treating TB in patients infected with HIV may also require more aggressive treatment to eliminate the bacteria.

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