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10) You are working in a local TB health center and you are about to interpret the result of a Mantoux tuberculin skin test on one of your patients who has had a history of fever and cough.
Which of the following is NOT true about tuberculin skin testing (TST) for tuberculosis?
A) Patients who have received BCG vaccine should not have TST.
B) An initially negative test does not exclude the possibility of active infection.
C) A subsequent (2nd) negative test, several weeks after the first, does not exclude the possibility of active infection.
D) A previously TST-positive patient can become TST-negative later in life.
E) For TST to reflect recent infection it should be done > 3 weeks after exposure
Explanation will be posted soon....
Which of the following is NOT true about tuberculin skin testing (TST) for tuberculosis?
A) Patients who have received BCG vaccine should not have TST.
B) An initially negative test does not exclude the possibility of active infection.
C) A subsequent (2nd) negative test, several weeks after the first, does not exclude the possibility of active infection.
D) A previously TST-positive patient can become TST-negative later in life.
E) For TST to reflect recent infection it should be done > 3 weeks after exposure
Explanation will be posted soon....