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Table 2 Comparative analysis of sensitivity and specificity of PCR assay and conventional antibiotic sensitivity test

From: Development and evaluation of a PCR assay for rapid detection of azithromycin resistant Campylobacter isolated from diarrhoeal patients in Kolkata, India

  Conventional sensitivity test Total
Resistant Sensitive
PCR assay
 Resistant 24 0 24
 Sensitive 0 335 335
Total 24 335 359
  1. Sensitivity = 24/(0 + 24) × 100 = 100%
  2. Specificity = 335/(0 + 335) × 100 = 100%
  3. Positive predictive value = 24/(0 + 24) × 100 = 100%
  4. Negative predictive value = 335/(0 + 335) × 100 = 100%