Pertussis in New South Wales, 1993–2005: the impact of vaccination policy on pertussis epidemiology
Kerri A. Viney A C , Jeremy M. McAnulty A and Sue Campbell-Lloyd BA Communicable Diseases Branch, NSW Department of Health.
B AIDS/Infectious Diseases Branch, NSW Department of Health.
C Corresponding author. Email: kvine@doh.health.nsw.gov.au
NSW Public Health Bulletin 18(4) 55-61 https://doi.org/10.1071/NB07068
Published: 8 June 2007
Abstract
Objective: To assess whether changes in vaccination policy have affected the epidemiology of pertussis in NSW between 1993 and 2005. Methods: Surveillance data from the NSW Notifiable Diseases Database was reviewed for the period. Results: 35 695 cases of pertussis were notified; annual incidence rates varied from 18.4 to 84.2 per 100 000 people. The highest rates of pertussis were consistently found in infants aged 0–6 months. Rates of disease in other age groups changed markedly over the study period, with high rates currently observed in adult age groups. Conclusions: New strategies may be needed to control pertussis in infants and in adults who now comprise the largest proportion of cases.
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