Mycobacterium and TB PCR
- The ideal specimens are AAFB smear-positive pulmonary samples
- CSF, pleural fluid, ascites etc. have much lower sensitivities; however submitting the largest possible volume of CSF or other fluid will increase the sensitivity. The minimum amount of CSF that will be examined is 0.5 mL.
- This test can also be used to confirm positive cultures and to detect the presence of the rifampicin resistance gene
- Paraffin waxed blocks can be examined but sensitivity is lower than that for fresh tissue
- Relevant clinical details
- Please provide details of any recent anti-tuberculosis treatment
- Please provide details of recent BCG vaccination
Transport to the laboratory immediately. Refrigerate samples if transport is delayed.
Sent to a National Reference Centre
Up to 3 working days
Page last reviewed: 22/12/2014