Case finding in RNTCP is based on –
Correct Answer: Sputum microscopy
Description: "Sputum microscopy not only confirms the diagnosis, but also indicates the degree of infectivity and response to treatment" - Park
Remember
At least 10000 (104) bacilli should be present per ml of sputum for demonstration in direct smear on ZN staining
Culture can detect 10-100 bacilli per ml of sputum
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