MRCP UK EXAMINATIONS

Detailed explanation-1: -Rapid sputum tests are also called nucleic acid amplification tests (NAATs). One of the best ways to diagnose TB is through a sputum culture. A sputum culture is a test to find germs (such as TB bacteria) that can cause an infection. A sample of sputum is added to a substance that promotes the growth of bacteria.

Detailed explanation-2: -NUCLEIC ACID AMPLIFICATION TEST (NAAT) In multi-bacillary diseases with a high mycobacterial load, a positive AFB smear with a positive NAAT would indicate active tuberculosis whereas a positive AFB smear with a negative NAAT in the absence of inhibitors would indicate nontuberculous mycobacterial (NTM) disease.

Detailed explanation-3: -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-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.