Skip to main content

Table 4 Summary of sensitivities, specificities, positive and negative predictive values of the boronic acid disk test using different antibiotic substrates with different concentrations of APB, in the phenotypic detection of NDM producers

From: Boronic acid disk diffusion for the phenotypic detection of polymerase chain reaction-confirmed, carbapenem-resistant, gram-negative bacilli isolates

Antibiotic used in boronic acid disk test No. of isolates confirmed by PCR as Test performance
Possessing NDM
(n = 8)
Not possessing NDM (n = 13) Sensitivity Specific Positive predictive value Negative predictive value
IPM 300 6 3 75 % 76.92 % 66.67 % 83.33 %
MEM 300 7 8 87.5 % 38.46 % 46.67 % 83.33 %
IPM 600 7 8 87.5 % 38.46 % 46.67 % 83.33 %
MEM 600 7 9 87.5 % 30.77 % 43.75 % 80 %