TABLE 10

CDC recommendations for interpretation and reporting of positive Xpert resultsa

Xpert resultInterpretationSuggested minimum reporting language
M. tuberculosis complex detectedM. tuberculosis complex DNA is detected in the sampleM. tuberculosis complex detected
Rifampin resistance detectedMutation(s) is detected in rpoBA mutation in rpoB has been detected, indicating possible rifampin resistance; confirmatory testing should follow
M. tuberculosis complex detectedM. tuberculosis complex DNA is detected in the sampleM. tuberculosis complex detected
Rifampin resistance not detectedMutation(s) is not detected in rpoBNo rpoB mutations detected; probably rifampin susceptible
M. tuberculosis complex detectedM. tuberculosis complex DNA is detected in the sampleM. tuberculosis complex detected
Rifampin resistance indeterminateMutation(s) in rpoB could not be determined due to insufficient signalPresence of rpoB mutations cannot be accurately determined
  • a Adapted from reference 342.