Resurgence of pertussis at the age of vaccination: clinical, epidemiological, and molecular aspects.

Objective: Report the incidence, epidemiology, clinical features, death, and vaccination status of patients with whooping cough and perform genotypic characterization of isolates of B. pertussis identified in the state of Paraná, during January 2007 to December 2013.

Methods: Cross-sectional study including 1,209 patients with pertussis.