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Tuberculosis (TB) is a serious disease caused by bacteria (germs) that can spread from person to person through the air. Most often, TB infects the lungs, but in severe cases, it can also harm other parts of your body. When not treated properly, TB can be fatal. This sheet tells you more about TB, how it is treated, and ways to help prevent its spread.
Anyone can get TB, but your risk is greatest if you:
Have an immune system weakened by medications such as steroids or a disease such as diabetes.
Have close contact with someone who has untreated active TB.
Live or work in a residential facility, such as a shelter, nursing home, or prison.
Travel to or come from a country where TB is common.
TB bacteria are released into the air when someone with the active form of TB coughs or sneezes. The bacteria spread easily, especially in crowded places with poor airflow. The longer you breathe these germs, the more likely you are to become infected.
There are two types of TB: inactive (also called TB infection) and active (also called TB disease).
Inactive TB (TB Infection)
If you have been diagnosed with inactive TB, it means you:
Have live TB bacteria in your lungs, but the germs have been sealed off, much like a scab covers a wound. As a result, you don’t have symptoms or feel sick. The only way to know you have inactive TB is with a TB test.
Can’t spread the infection to others.
May need medication to keep the infection from becoming active.
Active TB (TB Disease)
If you have been diagnosed with active TB, it means you:
Have symptoms of TB such as a lasting cough, fatigue, fever, night sweats, and weight loss. You are likely to feel very sick.
Can spread the infection to others.
Must take medication to help cure the disease. Treatment often takes months. TB can be hard to cure.
Two tests can help detect TB infection:
Skin test (PPD): A testing solution is placed just beneath the skin on your arm to see if a reaction (such as a hard, red bump) occurs. You will need to return to the office in 2 or 3 days to have your arm checked. Be sure to keep the appointment. You will learn the test results during this visit.
Blood test: In this test, a small amount of blood is drawn and sent to a laboratory for testing. Your doctor can tell you whether this test is offered in your area.
Other tests: If you have TB infection, other tests, such as a chest x-ray, are needed to learn whether the infection is active. Your doctor may also take a sample of your sputum (mucus that comes up when you cough). The sample is sent to a laboratory and tested for TB bacteria. Knowing the type of bacteria causing your illness helps your doctor choose the right medication to treat the disease.
A negative result usually means that your body is free of TB bacteria.
A positive result means you have been exposed to the germs that cause TB.
Both inactive and active TB are treated with medications. If you have active TB, you may take more medication for a longer time.
You will likely begin feeling better shortly after starting treatment, but be sure to keep taking all the medication you have been prescribed. This is the only way to cure the disease. Not taking all the medication means you won’t get well and can continue to spread TB germs to others.
Sometimes TB germs are resistant. This means they don’t respond to the medications normally used to treat them. Resistant TB is harder to cure, but effective medications can almost always be found.
During treatment, you may participate in a program called DOT (directly observed therapy). In this program, a nurse or healthcare worker supervises your treatment. This makes it easier to finish treatment in the least amount of time. You can also ask a friend or family member to remind you to take your medication.
Make sure to take all the medication as directed, even when you start feeling better. You will take the medication for 6 months or longer. Sticking to this schedule takes patience. But stopping treatment early means your symptoms may come back. It also helps create germs that are more harmful and harder to kill.
Get plenty of rest and eat healthy meals. A nutritious diet full of fresh fruits and vegetables helps the body fight infection.
Check with your healthcare provider before using any over-the-counter medications that haven’t been prescribed.
If you are taking birth control pills, use an additional backup method of birth control. Your TB medication may make the pill less effective.
Limit your activity to avoid fatigue. Plan frequent rest periods.
Keep your medical appointments. You will need to be checked often to make sure that your medication is working and you are getting better.
TB is a serious illness that takes a long time to cure. If you have a family member or friend with TB, you can help by reminding your loved one to:
Take TB medications at the same time every day (they’re best taken with water, milk, or juice 30 minutes before meals or at bedtime).
Keep all follow-up appointments (you can help by driving or arranging for a ride).
Get plenty of rest.
Eat healthy meals.
If you have active TB, you should:
Ask family, friends, and the people you work with to get tested. Active TB can spread to other people.
Avoid close contact with others until your doctor says it’s okay.
Wash your hands often, especially after coughing.
Use a tissue to cover your mouth when you cough. If you don’t have a tissue, cough into the crook of your elbow, not your hand.
Use a plastic bag to throw away old tissues and other supplies.
Call your doctor right away if you have any of the following:
A fever of 100.4°F or higher
Increased coughing or coughing up blood
Chest pain or shortness of breath
Also call your doctor if you are taking TB medication and think you are having side effects, such as skin rash, yellowing of the eyes, or stomach problems.