A person can get an infection after inhaling the droplets. This can happen when they're speaking, singing, laughing, coughing or sneezing. They release tiny droplets that carry the bacteria through the air. People with active TB disease in the lungs or voice box can spread the disease. Tuberculosis is caused by a bacterium called Mycobacterium tuberculosis. See your health care provider if you have symptoms that don't improve with a few days of rest. The symptoms of tuberculosis are similar to symptoms of many different illnesses. Also, a baby may have symptoms from swelling in the fluid around the brain or spinal cord, including: Infants.The baby doesn't grow or gain weight as expected.Younger children may have a fever that won't go away and weight loss. Typically, symptoms by age may include the following: Symptoms of active TB disease in children vary. Fluid surrounding the brain and spinal cord.Īctive TB disease in children.Common symptoms may include:Īctive TB disease in the voice box is outside the lungs, but it has symptoms more like disease in the lungs.Ĭommon sites of active TB disease outside the lungs include: Symptoms vary depending on what part of the body is infected. This is called extrapulmonary tuberculosis. TB infection can spread from the lungs to other parts of the body. They may include:Īctive TB disease outside the lungs. Symptoms of active TB disease in the lungs usually begin gradually and worsen over a few weeks. But it usually happens after months or years of latent TB infection. Active TB disease may happen right after primary infection. Germs cause disease throughout the lungs or other parts of the body. Active TB disease happens when the immune system can't control an infection. There are no symptoms during latent TB infection.Īctive TB disease. The germs can't do any more harm if the immune system keeps them under control. Immune system cells build a wall around lung tissue with TB germs. Primary infection is usually followed by the stage called latent TB infection. Some people may get flu-like symptoms, such as: Most people don't have symptoms during a primary infection. But some captured germs may still survive and multiply. The immune system may completely destroy the germs. Immune system cells find and capture the germs. The first stage is called the primary infection. A TB infection may be in one of three stages. When TB germs survive and multiply in the lungs, it is called a TB infection.
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