Table 6.

Role of PCR for the primary diagnosis of TB and specification of positive smear results

Test(s) performed for primary diagnosisNo. of specimensComment
Microscopy plus CA or in-house PCR4Smear-positive MOTT infections
4Unspecific smear results
17Smear-positive TB cases
CA or in-house PCR7Smear-negative TB cases (including 2 culture-negative cases)
In-house PCR only4Smear-negative TB cases (including 3 missed by CA)
In-house PCR2False-positive PCR results
CA4False-positive PCR results
 Total42Cases with a positive result by any of the investigated methods