Table 3.

Results of different screening tests for group 1 microorganisms

NVMM guidelineNo. of isolates with indicated ESBL test result
EbSAChromIDMIC stripVitek2 test panel
PositiveNegativePositiveNegativePositiveNegativeInconclusiveaPositiveNegativeInconclusivea
ESBL positive281102838275115271146
ESBL negative1320113201101021022014846
Sensitivity (%)96.697.399.695.1
Specificity (%)93.993.991.188.1
  • a Inconclusive test results were excluded from sensitivity and specificity calculations.