Tuberculosis: Causes and How It Spreads | Tuberculosis (TB) | CDC
Mar 6, 2024 · Causes. Tuberculosis (TB) is caused by a bacterium (or germ) called Mycobacterium tuberculosis. When a person breathes in TB germs, the germs can settle in the lungs and begin to grow. From there, they can move through the blood to other parts of the body, such as the kidney, spine, and brain. TB bacteria can live in the body without making you ...
Tuberculosis - World Health Organization (WHO)
Oct 29, 2024 · Tuberculosis (TB) is an infectious disease caused by bacteria that most often affects the lungs. It spreads through the air when people with TB cough, sneeze or spit. Tuberculosis is preventable and curable. About a quarter of the global population is estimated to have been infected with TB bacteria.
Tuberculosis (TB) | Tuberculosis (TB) | CDC - Centers for Disease ...
Provided by the Cente... Tuberculosis (TB) genotyping analyzes the DNA of TB bacteria to help distinguish different strains. ... Learn about the services and resources available from CDC's Tuberculosis Laboratory. CDC's research contributes to new diagnostics, treatments, and approaches to eliminate tuberculosis.
Tuberculosis - World Health Organization (WHO)
Nov 6, 2024 · Tuberculosis (TB) is the world’s top infectious killer. Nearly 4500 people lose their lives and 30 000 people fall ill with TB each day. TB is contagious and airborne. It is caused by bacteria (Mycobacterium tuberculosis) that most often affect the lungs. TB is spread from person to person through the air. When people with lung TB cough, sneeze or spit, they propel TB germs into the air. A ...
Clinical Overview of Tuberculosis | Tuberculosis (TB) | CDC
May 8, 2024 · Tuberculosis (TB) is an airborne disease caused by the bacterium Mycobacterium tuberculosis (M. tuberculosis). M. tuberculosis and seven very closely related mycobacterial species (M. bovis, M. africanum, M. microti, M. caprae, M. pinnipedii, M. canetti, and M. mungi) comprise what is known as the M. tuberculosis complex.
About Tuberculosis | Tuberculosis (TB) | CDC - Centers for Disease ...
Dec 19, 2023 · Overview. Tuberculosis (TB) is caused by a bacterium (or germ) called Mycobacterium tuberculosis. In the United States, the majority of TB disease cases in people are caused by Mycobacterium tuberculosis. Other mycobacteria (such as Mycobacterium bovis) can also cause TB disease in people. TB usually affects the lungs.
Tuberculosis - World Health Organization (WHO)
Jan 18, 2018 · Tuberculosis (TB) is caused by bacteria (Mycobacterium tuberculosis) that most often affect the lungs. Tuberculosis is curable and preventable. TB is spread from person to person through the air. When people with lung TB cough, sneeze or spit, they propel the TB germs into the air. A person needs to inhale only a few of these germs to become ...
Clinical Overview of Tuberculosis Disease | Tuberculosis (TB) | CDC
May 8, 2024 · People with TB disease: Have a large amount of active TB bacteria in their body. May spread TB bacteria to others. May feel sick, and may have symptoms such as a cough, fever, and/or weight loss. Usually have a positive TB blood test or TB skin test result indicating TB infection. May have abnormal chest radiographs.
Clinical Overview of Latent Tuberculosis Infection | Tuberculosis …
People with latent TB infection: Have a small number of TB bacteria in their body that are alive but inactive. Cannot spread TB bacteria to others. Do not feel sick, but may become sick if the bacteria in their bodies become active. Usually have a positive TB blood test or TB skin test results indicating TB infection.
Signs and Symptoms of Tuberculosis | Tuberculosis (TB) | CDC
Key points. Symptoms of active tuberculosis (TB) disease depend on where the TB germs are growing in the body. Common symptoms of active TB disease include cough, pain in the chest, and coughing up blood or sputum (phlegm). People with inactive TB, also called latent TB infection, do not have symptoms of TB disease and cannot spread TB to others.