A small amount of a substance called PPD tuberculin is injected just below the skin of your inside forearm. Most infections show no symptoms, in which case it is known as latent tuberculosis. https://www.who.int/news-room/fact-sheets/detail/tuberculosis Latent TB, also called inactive TB or TB infection, isn't contagious. TB is an airborne disease caused by the bacteria Mycobacterium tuberculosis and Mycobacterium bovis. Tuberculosis generally affects the lungs, but can also affect other parts of the body. It's spread when a person with active TB disease in their lungs coughs or sneezes and someone else inhales the expelled droplets, which contain TB bacteria. People with the germ have a 10 percent lifetime risk of getting sick with TB. You can get TB only if you come into contact with people who have it. During the physical exam, your doctor will check your lymph nodes for swelling and use a stethoscope to listen carefully to the sounds your lungs make while you breathe.The most commonly used diagnostic tool for tuberculosis is a simple skin test, though blood tests are becoming more commonplace. Read about the history of tuberculosis (TB), its symptoms, causes, diagnosis, treatment, testing, and prevention information. Tuberculosis (TB) is an infectious disease that usually affects the lungs, though it can affect any organ in the body. Tuberculosis (TB) is caused by a type of bacterium called Mycobacterium tuberculosis. In this condition, you have a TB infection, but the bacteria remain in your body in an inactive state and cause no symptoms. For this reason, doctors make a distinction between: 1. Tuberculosis is an extremely infectious disease caused by the bacterium Mycobacterium tuberculosis. Tuberculosis (TB) is most common in developing countries, but more than 9,000 cases were reported in the United States in 2016. Its one of the top-10 causes of death worldwide. Tuberculosis Causes Tuberculosis is caused by bacteria that spread through the air, just like a cold or the flu . Pulmonary tuberculosis (TB) is a contagious, infectious disease that attacks your lungs. Tuberculosis (TB) is an infectious disease usually caused by Mycobacterium tuberculosis (MTB) bacteria. About 10% of latent infections progress to active disease which, if left untreated, kills about half of those affected. It can develop when bacteria spread through droplets in the air. Although your body may harbor the bacteria that cause tuberculosis (TB), your immune system usually can prevent you from becoming sick. Tuberculosis is preventable, and if its contracted and discovered early, its generally treatable. Latent TB.

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