B. pertussis was grown on Bordet-Gengou agar (BD, Sparks, MD, USA) supplemented with 10% casamino acid (Fisher Scientific, USA). B. holmesii and B. parapertussis were grown in 5% sheep blood agar (BD, ...

Final blood cultures were negative. After incubation of the epiglottic swab specimen on 5% sheep blood agar plates at 37°C in 5% carbon dioxide, the predominant colonies found were large and beta ...