Latent tuberculosis (TB) means that you have bacteria in your body that could cause active TB disease. You can't spread the bacteria to other people at this time. But if your immune system can't keep the bacteria from growing, the disease becomes active. People with weakened immune systems are more likely to develop active TB.
With active TB in your lungs, you can spread the disease to others. Active TB is a serious disease.
Latent TB doesn't have any symptoms. You may even be surprised that you have it, since you don't feel sick. It's very important to take your antibiotic medicine as your doctor tells you to. This treatment prevents you from getting active TB. It takes a long time to rid your body of TB. You may be taking medicine for many months. During your treatment you'll see your doctor for tests to see how the medicine is working. Your doctor will help guide you through this long process.
You may have directly observed therapy (DOT). This means that a health care worker watches when you take your medicine. DOT helps you remember to take your medicine. And it helps you complete your treatment as soon as possible.
Tuberculosis (TB) is an infection caused by bacteria. It usually affects the lungs. Symptoms may include fever, extreme fatigue, weight loss, night sweats, and a cough that brings up thick, bloody mucus.
TB can be deadly if it isn't treated.
TB develops when you breathe TB bacteria into your lungs. The infection usually stays in the lungs. But the bacteria can travel through the bloodstream to other parts of the body. When that happens, it becomes active TB. If active TB isn't treated, it can cause respiratory damage.
Symptoms of active TB start gradually and develop over weeks or months. You may have a cough, lose your appetite, and lose weight. You may have night sweats, a fever, or chills. And you may feel tired and weak.
TB is treated with antibiotics to kill the TB bacteria. How many antibiotics are used and how long you'll take them may depend on whether you have active or latent TB. TB can only be cured if you take all the doses of your medicine.
TB in the lungs is spread very easily. To avoid getting TB:
A TB vaccine is used in parts of the world where the risk of getting TB is higher. But it's almost never used in the United States.
Doctors usually find latent TB by doing a tuberculin skin test. A doctor or nurse will inject TB antigens under your skin. If you have TB bacteria in your body, within 2 days you will get a red bump where the needle went into your skin. The test can't tell when you became infected with TB or if it can be spread to others. A blood test also can be done to look for TB.
To find TB in the lungs, doctors test a sample of mucus from the lungs to look for TB bacteria. Doctors sometimes do other tests or take a chest X-ray to help find TB in the lungs.
To find TB that's not in the lungs, doctors may take a tissue sample (biopsy) or do imaging tests.
TB is treated with antibiotics to kill the TB bacteria.
In most cases, doctors combine four antibiotics to treat active TB. You must take the medicine for active TB for at least 6 months. If tests still show an active TB infection after 6 months, then treatment lasts up to 9 months or longer. If the TB bacteria are resistant to several antibiotics (multidrug-resistant TB), then treatment may be needed for a year or longer.
If you have latent TB, you may be treated with one or more antibiotics for many months.
TB can only be cured if you take all the doses of your medicine. A doctor or nurse may watch you take it to make sure that you never miss a dose.
Health professionals and public health agencies can help you find out if you have tuberculosis (TB) and can help with treatment. These include:
If you have multidrug-resistant TB (MDR-TB), you may need to go to a special treatment center that treats this type of TB.
Some people are more likely than others to get TB. This includes people who have a weak immune system, have close contact with someone who has active TB, have poor access to health care, or abuse drugs or alcohol. People who travel or live where untreated TB is common are also at risk.
TB that's in the lungs can spread when a person who has active TB breathes out air that has the TB bacteria in it. Another person may breathe in the bacteria. Things like coughing can also release even more bacteria. TB that isn't in the lungs can't spread easily to others.
TB is caused by Mycobacterium tuberculosis. This is a type of slow-growing bacteria. It thrives in parts of the body that are rich in blood and oxygen, such as the lungs.
Without treatment, active TB can cause other serious health problems, such as:
Tuberculosis (TB) is a serious disease caused by a type of bacteria that is spread through the air. TB is easily spread from person to person through coughs or sneezes. TB usually occurs in the lungs. But it can spread to other parts of the body.
TB is either active or latent.
Call 911 anytime you think you may need emergency care. For example, call if:
Call your doctor now or seek immediate medical care if:
Watch closely for changes in your health, and be sure to contact your doctor if:
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