tuberculin test


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tuberculin test

[tə′bər·kyə·lən ‚test]
(immunology)
A test for past or present infection with tubercle bacilli based on a delayed hypersensitivity reaction at the site where tuberculin or purified protein derivative was introduced.
References in periodicals archive ?
Comparative cervical intradermal tuberculin test was performed, briefly 0.1ml (25,000 IU) avian purified protein derivative (a-PPD) and 0.1ml (20,000 IU) bovine purified protein derivative (b-PPD) were injected at 12 cm distant points on left lateral side of neck.
However, a tuberculin test is limited in its specificity and sensitivity, so culture should be used to confirm the presence of M.
[22.] Ameni G, Hewinson G, Aseffa A, Young D, Vordermeier M (2008) Appraisal of interpretation criteria for the comparative intradermal tuberculin test for diagnosis of tuberculosis in cattle in central Ethiopia.
Anaemia with hypoproteinaemia 2 Total 100 Table-3: Correlative findings with tuberculous pleural effusion (N = 80) Correlative Findings Positive N (<%) Negative N (<%) Past history 11 (13.75) 69 (86.25) Family history 4 (5.00) 76 (95.00) Smoking 35 ( 43.75) 45 (56.25) X-ray chest 33 (41.25) 47 (58.75) Tuberculin test 52 (65.00) 28 (35.00) Sputum AFB 5 (6.25) 75 (93.75) Table-4: Number of positive and negative cases according to cut off level (45 U/L) of pleural fluid ADA Pleural fluid ADA Tuberculous Non-tuberculous Total pleural pleural effusion effusion Positive (U/L) 72 3 75 Negative (U/L) 8 17 25 Total 80 20 100 Figure-1: Mean ADA in pleural effusion of various etilogies Empyema 72 TB 60 Pneumonia 30 Malignancy 27 Anaemia 21 CCF 9.8 Cirrhosis 8.4 Note: Table made from bar graph.
Considering that the tuberculin test is not a perfect test, some animals could have been missed resulting in underestimation of the prevalence.
(b) Simple intradermal tuberculin test. (c) Comparative intradermal tuberculin test.
They determined that although tuberculin test was positive for more than 20 mm, no other symptom suggesting tuberculosis was noted in these children.
False positive tuberculin tests occur in individuals who have been infected with other mycobacteria, including vaccination with BCG.
In Mexico, the diagnosis of the bovine tuberculosis is conducted by using the tuberculin test in live animals, bacteriologic isolation and histopathological analysis in postmortem.
Any 'yes' response is considered a positive risk factor and is an indication for administration of the Mantoux tuberculin test to the teen.
In order to clarify the meaning of the negative tuberculin test, persons are tested with other common antigens to verify the response.
Most people with previous exposure to TB will test positive on the tuberculin test, as will some people exposed to related mycobacteria.