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AFB Culture

All Tests And Procedures


The reason AFB or TB culture is recommended is to confirm the diagnosis of TB, since other mycobacteria (non-tuberculous or atypical mycobacteria) can also mimic TB and are positive for AFB on microscopy. Secondly, the culture test can be followed by susceptibility testing, which is very useful, since many cases are now multi-drug resistant, and the drugs susceptibility results can be used to modify the treatment and make it more specific for the patient.

Purpose of test

Positive AFB cultures identify the particular mycobacterium causing symptoms, and susceptibility testing on the identified organism gives the doctor information about how resistant it may be to treatment.

Test Result Interpretation

Growth or No Growth with sensitivity pattern


Early morning sputum sample in a sterile container.

Turnaround time

8 weeks

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