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Tuberculosis (TB), also known colloquially as the "white death", or historically as consumption, [7] is a contagious disease usually caused by Mycobacterium tuberculosis (MTB) bacteria. [1] Tuberculosis generally affects the lungs , but it can also affect other parts of the body. [ 1 ]
A 2007 before-after observational study found that use of the MTD test reduced inappropriate tuberculosis therapy. The study found the accuracy of the MTD test as follows: [8] Overall sensitivity 92%, specificity 99%. In Smear positive patients high sensitivity 99%, specificity 98%. In smear negative patients low sensitivity 62%, but high ...
The results of this test must be interpreted carefully. The person's medical risk factors determine at which increment (5 mm, 10 mm, or 15 mm) of induration the result is considered positive. [12] A positive result indicates TB exposure. 5 mm or more is positive in An HIV-positive person; Persons with recent contacts with a TB patient
There's also a skin test. If either one is positive, she takes an X-ray of the person's chest. ... Patients with active TB get quarantined for two weeks in "negative pressure" rooms that keep the ...
TB kills more than one million people each year, according to the World Health Organisation. Blood test could identify millions of people spreading tuberculosis unknowingly Skip to main content
With this test, tuberculin is injected between layers of the dermis, tuberculin is a component of the bacteria, and if a person has previously been exposed to TB, the immune system reacts to the tuberculin and produces a small, localized reaction within 48 to 72 hours; if the reaction creates a large enough area of induration (rather than just ...
Not all of the 1,154 cases found last year are active ones that can spread the disease.
Tuberculin, also known as purified protein derivative, is a combination of proteins that are used in the diagnosis of tuberculosis. [1] This use is referred to as the tuberculin skin test and is recommended only for those at high risk. [2]
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