'HOW' does tuberculosis attack the lungs of our body..urgent!!?!
Question: I think you can find all info on this site, or maybe look for more sites on health care, I'm sure you can find the right answer !
Answers: I think you can find all info on this site, or maybe look for more sites on health care, I'm sure you can find the right answer !
TB is an encapsuleated virus that once the capsul is broken, the virus is air born. This does not happen every day, not weekly. It is an uncommon event. TB of the lungs and throat is infectious. When a person with TB of the lungs coughs or sneezes, TB bacteria spread into the air. People nearby may breathe in these bacteria and become infected. When a person breathes in TB bacteria, the bacteria settle in the lungs and begin to grow. From there, they may move through the blood to other parts of the body, such as the kidney, spine or brain. When the inhaled tuberculosis bacteria enter the lungs, they can multiply and cause a local lung infection (pneumonia). The local lymph nodes associated with the lungs may also become involved with the infection and usually become enlarged. The hilar lymph nodes (the lymph nodes adjacent to the heart in the central part of the chest) are often involved.
In addition, TB can spread to other parts of the body. The body's immune (defense) system, however, can fight off the infection and stop the bacteria from spreading. The immune system does so ultimately by forming scar tissue around the TB bacteria and isolating it from the rest of the body. Tuberculosis that occurs after initial exposure to the bacteria is often referred to as primary TB. If the body is able to form scar tissue (fibrosis) around the TB bacteria, then the infection is contained in an inactive state. Such an individual typically has no symptoms and cannot spread TB to other people. The scar tissue and lymph nodes may eventually harden, like stone, due to the process of calcification of the scars (deposition of calcium from the bloodstream in the scar tissue). These scars often appear on x-rays and imaging studies like round marbles and are referred to as a granuloma. If these scars do not show any evidence of calcium on x-ray, they can be difficult to distinguish from cancer.