title: [Pertussis in Mexico, an epidemiological overview. A study of 19 years at the Instituto Mexicano del Seguro Social].
abstract: BACKGROUND
  Bordetella pertussis infection remains a public health problem in several developed and developing we describe the epidemiological syndrome cases subsystem special surveillance of whooping cough from 1992 to 2011 at a population with social security.
  
  
  METHODS
  We obtained special cases subsystem Pertussis surveillance of 1992-2011. Univariate analysis was made of rates, ratios and proportions. Wilson was determined test for proportions to an alpha of 0.05, t-test for mean difference.
  
  
  RESULTS
  We appreciate epidemic cycles every three to five years, the average baseline incidence, excluding epidemic years, 0.1 is considered confirmed cases per 100 000 beneficiaries assigned to family medicine, the highest incidence was recorded in 1997 and 2009. The most affected were children under 1 year of age and in outbreaks, the disease occurred at older ages.
  
  
  CONCLUSIONS
  During the period observed intermediate epidemic cycles 5 and 3 years of age presentation is consistent in other countries.
authors.affiliation: Coordinación de Programas Médicos, Coordinación de Vigilancia Epidemiológica, Instituto Mexicano del Seguro Social, Distrito Federal, México. dcpreventiva@gmail.com.
authors.forename: Gabriela Fidela
authors.initials: GF
authors.lastname: Pérez-Pérez
authors.forename: Teresita
authors.initials: T
authors.lastname: Rojas-Mendoza
authors.forename: David Alejandro
authors.initials: DA
authors.lastname: Cabrera-Gaytán
authors.forename: Concepción
authors.initials: C
authors.lastname: Grajales-Muñiz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D062486:Public Health Surveillance; D014917:Whooping Cough / Q000453:epidemiology*; D055815:Young Adult
keywords: Bordetella pertussis; Epidemiological surveillance; Whooping cough