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Table 2 Summary of sensitivities, specificities, positive and negative predictive values of the boronic acid disk test using different antibiotic substrates with different concentrations of APB, for the phenotypic detection of OXA-48 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 OXA-48 (n = 24) Not possessing OXA-48 (n = 13) Sensitivity Specific Positive predictive value Negative predictive value
IPM 300 17 3 70.8 % 76.92 % 85 % 58.82 %
MEM 300 18 8 75 % 38.46 % 69.23 % 45.45 %
IPM 600 19 8 79.17 % 38.46 % 70.37 % 50 %
MEM 600 20 9 83.33 % 30.77 % 68.97 % 50 %