The tuberculosis skin test is based on the fact that infection with M. tuberculosis produces a delayed-type hypersensitivity skin reaction to certain components of the bacterium. The standard recommended tuberculin test is administered by injecting 0.1mL of 5 TU (tuberculin units) PPD into the top layers of skin of the forearm. "Reading" the skin test means detecting a raised, thickened local area of skin reaction, referred to as induration. The area of induration (palpable, raised, hardened area) around the site of injection is the reaction to tuberculin. Read more: Tuberculosis Skin Test (PPD Skin Test) Article
Multimedia: Slideshows, Images & Quizzes
Related Disease Conditions
Crohn's disease is a chronic inflammatory disease, primarily involving the small and large intestine, but which can affect other parts of the digestive system as well. Abdominal pain, diarrhea, vomiting, fever, and weight loss are common symptoms.
Diabetes (Type 1 and Type 2)
Diabetes is a chronic condition characterized by high levels of sugar (glucose) in the blood. The two types of diabetes are referred to as type 1 (insulin dependent) and type 2 (non-insulin dependent). Symptoms of diabetes include increased urine output, thirst, hunger, and fatigue. Treatment of diabetes depends on the type.
Rheumatoid Arthritis (RA)
Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic inflammation of the joints, the tissue around the joints, as well as other organs in the body. Because it can affect multiple other organs of the body, rheumatoid arthritis is referred to as a systemic illness and is sometimes called rheumatoid disease. The 16 characteristic early RA signs and symptoms include the following. Anemia Both sides of the body affected (symmetric) Depression Fatigue Fever Joint deformity Joint pain Joint redness Joint stiffness Joint swelling Joint tenderness Joint warmth Limping Loss of joint function Loss of joint range of motion Many joints affected (polyarthritis)
Mycobacterium tuberculosis is the bacterium that causes tuberculosis (TB). Symptoms and signs of TB include bloody sputum, fever, cough, weight loss, and chest pain. Treatment depends upon the type of TB infection.
Cancer is a disease caused by an abnormal growth of cells, also called malignancy. It is a group of 100 different diseases, and is not contagious. Cancer can be treated through chemotherapy, a treatment of drugs that destroy cancer cells.
Disease Prevention in Women
Disease prevention in women includes screening tests that are a basic part of prevention medicine. All screening tests are commonly available through your general doctor. Some specialized tests may be available elsewhere.
Hypertensive Kidney Disease
High blood pressure can damage the kidneys and is one of the leading causes of kidney failure (end-stage renal kidney disease). Kidney damage, like hypertension, can be unnoticeable and detected only through medical tests. If you have kidney disease, you should control your blood pressure. Other treatment options include prescription medications.
Extensively Drug-Resistant Tuberculosis (XDR TB)
Extensively drug-resistant tuberculosis (XDR TB) is a rare form of multidrug-resistant tuberculosis (MDR TB) that's transmitted when TB germs are expelled into the air by sneezing, speaking, singing, or coughing.
Is Tuberculosis (TB) Contagious?
Mycobacterium tuberculosis causes tuberculosis (TB). TB may be transmitted when an infected person sings, sneezes, coughs, or talks. TB symptoms and signs include coughing bloody sputum, night sweats, severe cough, fever, chills, fatigue, and weight loss.
Can Tuberculosis Be Cured?
Tuberculosis (TB) infection is caused by a bacteria called Mycobacterium tuberculosis. It mostly affects your lungs but it can also affect other parts of the body including the lymph glands, brain, kidneys, bowels or bones. Tuberculosis (TB) is 100% curable if treated with the approved four drug combination for a minimum of six months.
The Difference Between Multidrug-Resistant TB MDR-TB and Extensively Drug-Resistant TB XDR-TB
Multidrug resistance (MDR) is when both isoniazid and rifampicin fail to work against TB infection. Extensively drug-resistant TB (XDR-TB) is a form of TB that is resistant to at least four of the core anti-TB drugs. XDR-TB involves resistance to the two most powerful anti-TB drugs, namely isoniazid and rifampicin.
Treatment & Diagnosis
Medications & Supplements
Prevention & Wellness
- Imaging Scans May Lead to Shorter TB Treatment
- Vaccine Might Help Prevent Active TB in Those Infected
- Health Tip: Getting a Tuberculosis Skin Test
- Deer Can Give You Tuberculosis: CDC
- Tuberculosis Decline in U.S. Has Stalled, CDC Reports
- Screen High-Risk Adults for Tuberculosis, Experts Say
- Doctors Save Life of U.S. Child With Drug-Resistant Tuberculosis
- Swiss Report Highlights Danger of Drug-Resistant Tuberculosis
- Decline in U.S. Tuberculosis Rates Slows: CDC
- Tuberculosis in U.S. Hits Record Low: CDC
- Health Tip: Risk Factors for Developing Tuberculosis
- Could Stem Cells Cure Drug-Resistant Tuberculosis?
- Shortage of Key Drug Hampering U.S. Efforts to Control TB: Report
- 'Alarming' Rise Seen in Drug-Resistant Tuberculosis
- U.S. Tuberculosis Cases Hit Record Low, CDC Says
Subscribe to MedicineNet's General Health Newsletter