title: An evaluation of public health interventions during a pertussis outbreak in the ACT, 2003.
abstract: OBJECTIVE
  To assess whether issuing information alerts increased the proportion of pertussis cases notified within the 21-day infectious period during a pertussis outbreak in the Australian Capital Territory (ACT) in 2003.
  
  
  METHODS
  The study included all persons resident in the ACT for whom a notification of pertussis was received with onset of disease between 1 March and 31 December 2003. Cases notified within 21 days of onset were called 'early notifications'. The effectiveness of information alerts was assessed by comparing the proportion of early notifications before and after each alert and over the course of the outbreak.
  
  
  METHODS
  The proportion of early notifications.
  
  
  RESULTS
  The proportion of early notifications ranged from 1/36 (2.7%) prior to the first intervention to 29/52 (55.7%) after the final intervention (p < 0.001).
  
  
  CONCLUSIONS
  This study supports the hypothesis that information alerts by ACT Health increase the proportion of cases notified within the infectious period of 21 days.
  
  
  CONCLUSIONS
  Early diagnosis of pertussis cases (within the infectious period) has the potential to limit transmission and protect susceptible infants.
authors.affiliation: Clinical Governance Unit, ACT Health, Canberra, Australian Capital Territory. rona.hiam@act.gov.au
authors.forename: Rona
authors.initials: R
authors.lastname: Hiam
authors.forename: Charles
authors.initials: C
authors.lastname: Guest
authors.forename: Geetha
authors.initials: G
authors.lastname: Isaac-Toua
mesh_terms: D000293:Adolescent; D000328:Adult; D020958:Australian Capital Territory / Q000453:epidemiology; D004196:Disease Outbreaks; D006801:Humans; D033181:Information Dissemination; D008875:Middle Aged; D011159:Population Surveillance / Q000379:methods*; D011634:Public Health / Q000379:methods*; D014917:Whooping Cough / Q000453:epidemiology*