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Paediatric active enhanced disease surveillance: a new surveillance system for Australia
Yvonne Zurynski1, Peter McIntyre, Robert Booy
1Australian Paediatric Surveillance Unit, Kids Research Institute, The Sydney Children’s HospitalsNetwork (Westmead), Westmead, NSW 2145, Australia. yvonne.zurynski@health.nsw.gov.au
Insights
The Paediatric Active Enhanced Disease Surveillance (PAEDS) system collected data on severe childhood diseases and vaccine adverse events. This surveillance enhanced public health policy and clinical practice in Australia.
Area of Science:
- Public Health
- Epidemiology
- Pediatrics
Background:
- Gaps exist in surveillance for severe vaccine-preventable diseases in children.
- Adverse events following immunisation require robust monitoring.
- The Paediatric Active Enhanced Disease Surveillance (PAEDS) was established to address these needs.
Purpose of the Study:
- To describe the Paediatric Active Enhanced Disease Surveillance (PAEDS) system.
- To outline its role in monitoring severe vaccine-preventable diseases and adverse events.
- To assess its effectiveness in data collection and public health impact.
Main Methods:
- Active surveillance conducted in four tertiary children's hospitals across Australia (August 2007-December 2010).
- Recruitment of children with acute flaccid paralysis, varicella, intussusception, infant seizures, and pandemic influenza.
- Collection of detailed clinical, immunisation, and laboratory data; ascertainment audits performed.
Main Results:
- 733 cases of target conditions and 601 influenza cases recruited.
- PAEDS enhanced acute flaccid paralysis surveillance, meeting WHO targets.
- Intussusception linked to rotavirus vaccination; varicella and seizure data provided insights into vaccine impact.
Conclusions:
- PAEDS provides crucial, novel data for public health policy and clinical practice.
- The system enhances community confidence in immunisation programs.
- PAEDS demonstrates potential for rapid response during outbreaks and epidemics.
Aim:
The Paediatric Active Enhanced Disease Surveillance (PAEDS) is described. PAEDS is active in four tertiary children's hospitals in four states of Australia and aims to address gaps in surveillance for severe vaccine-preventable diseases and adverse events following immunisation.
Methods:
From August 2007 to December 2010, surveillance nurses actively identified and recruited children admitted with: acute flaccid paralysis, varicella infection, intussusception, seizures in infants and pandemic influenza (June-October 2009). Details of presentation, medical and immunisation history, outcome and laboratory results were collected. Completeness of ascertainment was estimated through audits of International Classification of Diseases 10th edition-coded medical records where possible.
Results:
Seven hundred thirty-three cases matching case definition criteria for the four conditions were recruited. In addition, 601 cases of influenza were recruited during the 2009 pandemic. PAEDS enhanced acute flaccid paralysis surveillance by the Australian Paediatric Surveillance Unit; the World Health Organization surveillance target was met when Australian Paediatric Surveillance Unit and PAEDS cases were combined. Among 133 children hospitalised for varicella, only 16 were vaccinated; samples of vesicle scrapings were collected in 57% for genotyping. Of 122 infants presenting with seizures, only six (12%) had received a vaccine in the last 7 days. Intussusception was more frequent among infants receiving their first dose of either of the rotavirus vaccines. Results informed policy and education for parents and health professionals. Preliminary audits of medical records suggest excellent ascertainment through PAEDS.
Conclusions:
PAEDS provides important, previously unavailable data to inform public health policy, clinical practice and community confidence. It has potential to respond quickly during outbreaks and epidemics.
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