RESPIRATORY
OLD TUBERCULOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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TRUE
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false
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Either A or B
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None of the above
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Detailed explanation-1: -Sputum smear microscopy is the principal mode of diagnosis in most countries with a high burden of tuberculosis. It is the most efficient way of identifying sources of infectious tuberculosis and confirming the diagnosis in suspected persons.
Detailed explanation-2: -Sputum smear microscopy is one of the most efficient tools for identifying people with infectious TB. Smear-positive patients are up to ten times more likely to be infectious than are smear-negative patients.
Detailed explanation-3: -The presence of acid-fast-bacilli (AFB) on a sputum smear or other specimen often indicates TB disease. Acid-fast microscopy is easy and quick, but it does not confirm a diagnosis of TB because some acid-fast-bacilli are not M. tuberculosis. Therefore, a culture is done on all initial samples to confirm the diagnosis.
Detailed explanation-4: -There are two kinds of tests used to detect TB bacteria in the body: the TB skin test (TST) and TB blood tests. A positive TB skin test or TB blood test only tells that a person has been infected with TB bacteria.