Table 3.

Results of pertussis and parapertussis PCR versus results of culturea

Culture resultNo. of patients (n = 520)
Pertussis PCRParapertussis PCR
PositiveNegativePositiveNegative
Positive17 02 0
Negative41b4625b513
  • a The percentage of patients who were PCR positive for pertussis was 11.2%; that of patients who were culture positive for pertussis was 3.3%. The percentage of patients who were PCR positive for parapertussis was 1.3%; that of patients who were culture positive for parapertussis was 0.4%.

  • b Includes two patients whose specimens were both positive by PCR and negative by culture for both B. pertussis and B. parapertussis.