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. 2019 Oct 21;2019(10):CD011420. doi: 10.1002/14651858.CD011420.pub3
Test specification Minimum required value
Medical decision Treatment initiation
Sensitivity: adults
(for pulmonary tuberculosis only;
regardless of HIV status)
Pulmonary tuberculosis
  • 95% for smear positive, culture positive

  • 60% to 80% for smear negative, culture positive


(detection of extrapulmonary tuberculosis being a preferred but not minimal requirement)
Sensitivity: children
(including extrapulmonary tuberculosis;
regardless of HIV status)
  • 80% compared to culture of any specimen and

  • 60% of probable tuberculosis (noting problem of lack of a gold standard)

Specificity: adults
  • 95% compared to culture

Specificity: children
  • 90% for culture‐negative probable tuberculosis (noting problem of lack of a gold standard)

  • 95% compared to culture

Time to results 3 hours maximum (patient must receive results the same day)
(desirable would be < 15 minutes)
Throughput 20 tests/day minimum, by one laboratory technician
Specimen type Adults: urine, oral, breath, venous blood, sputum
(desired: non sputum‐based sample type and use of finger prick
instead of venous blood)
Children: urine, oral, capillary blood (finger or heel prick)
Sample preparation
  • 3 steps maximum

  • Safe: biosafety level 1

  • Ability to use approximate volumes (that is, no need for precise pipetting)

  • Preparation that is not highly time sensitive

Number of samples 1 sample per test
Readout
  • Easy‐to‐read, unambiguous, simple "yes", "no", or "invalid" answer

  • Readable for at least one hour

Waste disposal
  • Simple burning or sharps disposal; no glass component

  • Environmentally acceptable disposal

Controls
  • Positive control included in test kit

  • Quality control simpler and easier than with sputum smear microscopy

Reagents
  • All reagents in self‐contained kit

  • Kit contains sample collection device and water (if needed)

Storage/stability required
  • Shelf life of 24 months, including reagents

  • Stable at 30°C, and at higher temperatures for shorter time periods

  • Stable in high humidity environments

Instrumentation
  • If instrument needed, no maintenance required

  • Instrument works in tropical conditions

  • Acceptable replacement cost

  • Fits in backpack

  • Shock resistant

Power requirement Can work on battery
Training
  • 1 day maximum training time

  • Can be performed by any health worker


< USD 10 per test after scale‐up
Cost