TB patients if they have ever had TB

Always ask "new' treatment before

The table below shows the determinants of the case definition and their importance.

Determinant of case definition


site of TB

recording and reporting

result of sputum smear for AFBs

° priority is to identify sputum smear-positive cases (since these are the infectious cases)

° in a good NTP, at least 50% of total cases will be smear-positive PTB ° recording and reporting (monitoring of bacteriological cure is readily available only in this group)

previous TB treatment

previously treated patients who are still sputum smear-positive have a high risk of drug-resistant TB and so need a different and more powerful regimen

severity of TB

most authorities recommend a less intensive regimen for patients with non-cavitary, smear-negative PTB (who are known to be HIV-negative)

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