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Thus, a positive reaction to a subsequent test may be misinterpreted as a new infection, when in fact it is the result of the boosted reaction to an old infection. [22] Use of two-step testing is recommended for initial skin testing of adults who will be retested periodically (e.g., health care workers).
15 mm or more is positive in Persons with no known risk factors for TB (Note: Targeted skin testing programs should only be conducted among high-risk groups) A tuberculin test conversion is defined as an increase of 10 mm or more within a 2-year period, regardless of age. [citation needed]
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] Reliable administration of the skin test requires large amounts of training, supervision, and practice.
The tine test is a multiple-puncture tuberculin skin test used to aid in the medical diagnosis of tuberculosis (TB). The tine test is similar to the Heaf test, although the Mantoux test is usually used instead. There are various forms of the tine tests which usually fall into two categories: the old tine test (OT) and the purified protein ...
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The Heaf test, a diagnostic skin test, was long performed to determine whether or not children had been exposed to tuberculosis infection. The test was named after F. R. G. Heaf . Also known as the Sterneedle test , [ 1 ] it was administered by a Heaf gun (trademarked "Sterneedle"), [ 2 ] a spring-loaded instrument with six needles arranged in ...
Nodules and fibrotic scars may contain slowly multiplying tubercle bacilli with the potential for future progression to active tuberculosis. [1] Persons with these findings, if they have a positive tuberculin skin test reaction, should be considered high-priority candidates for treatment of latent infection regardless of age.
Negative reaction to tuberculin skin test 2: TB infection No disease: Positive reaction to tuberculin skin test Negative bacteriologic studies (if done) No clinical, bacteriologic, or radiographic evidence of TB 3: TB, clinically active: M. tuberculosis cultured (if done) Clinical, bacteriologic, or radiographic evidence of current disease 4: TB