Examination QA Procedures in C&DST Laboratories

The examination procedure for Quality Assurance of TB and DST Laboratories includes:

1. Standard Operating Procedures (SOP)​
 Updated annually or more often as needed
 Reviewed and signed by staff annually​
 Obsolete procedures removed, labelled as “Obsolete”

2. Calibration/ Validation- Equipment​
 Biosafety cabinets
 Safety centrifuges and autoclaves
 Thermometers, pipettes and timers​

3. Validation of new methods/procedures​
All new methods are evaluated against the reference/gold standard for​:
 Sensitivity
 Specificity​
 Positive predictive value
 Negative predictive value
 Turn-around time ​

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