Investigation of an outbreak of acute illness in a school group visiting Sydney, September 2006
Trish Mannes A D , Bradley Forssman A , Leena Gupta A , Mark Ferson B , Simone Christopher B , Jeremy McAnulty C and Jennie Musto CA Sydney South West Public Health Unit, Sydney South West Area Health Service
B South East Sydney Illawarra Public Health Unit, South East Sydney Illawarra Area Health Service
C NSW Department of Health, Communicable Diseases Branch
D Corresponding author. Email: trish.mannes@gmail.com
NSW Public Health Bulletin 19(2) 20-23 https://doi.org/10.1071/NB07042
Published: 28 February 2008
Abstract
Objective: We describe the investigation into an outbreak of acute illness in approximately 40 people attending Darling Harbour in Sydney during a school music camp. Methods: We used three methods, including the Public Health Realtime Emergency Department Surveillance System, to obtain information on the food and travel history of the group and symptoms of the cases rapidly. Results: Forty-five cases of gastroenteritis were identified in people on the bus trip. Most dates of onset of illness were obtained from triage text fields in the NSW Public Health Real Time Emergency Department Surveillance System, and were verified through medical record review and interviews. No causative agent was identified. Conclusion: The investigation suggested person-to-person transmission rather than a point source, and demonstrates how the NSW Public Health Real Time Emergency Department Surveillance System can assist with case finding in public health investigations.
Acknowledgements
We wish to acknowledge the assistance of the following people: public health unit staff in Greater Southern Area Health Service and Chris Oxenford, OzFoodNet epidemiologist, Australian Capital Territory for assistance with the investigation in Sutton and Canberra; and public health unit staff in Sydney South West and South Eastern Sydney Illawarra Area Health Services for assistance with the investigation in Sydney.
[1] Muscatello DJ, Churches T, Kaldor J, Zheng W, Chiu C, Correll P, et al. An automated, broad-based, near real-time public health surveillance system using presentations to hospital Emergency Departments in New South Wales, Australia. BMC Public Health 2005; 5 141.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
[2] Ferson MJ, Yankos P, Pontivivo G, Wong A, Lee D, Isaacs M, et al. Value of a reverse transcriptase-polymerase chain reaction assay for Norwalk-like viruses in the investigation of institutional gastroenteritis outbreaks. N S W Public Health Bull 1999; 10 158–60.
| Crossref | GoogleScholarGoogle Scholar |
[3]
[4] Vinje J, Vennema H, Maunula L, von Bonsdorff C-H, Hoehne M, Schreier E, et al. International collaborative study to compare reverse transcriptase PCR assays for detection and genotyping of noroviruses. J Clin Microbiol 2003; 41(4): 1423–33.
| Crossref | GoogleScholarGoogle Scholar | PubMed |
[5] Pedalino B, Feely E, McKeown P, Foley B, Smyth B, Moren A. An outbreak of Norwalk-Like viral gastroenteritis in holidaymakers travelling to Andorra, January-February 2002. Euro surveillance 2003; 8(1): 1–7.
| PubMed |
[6]
[7] NSW Public Health Bulletin Communicable diseases report NSW for September and October 2005. N S W Public Health Bull 2005; 16(11–12): 205–11.
| PubMed |
[8] NSW Public Health Bulletin Communicable diseases report, New South Wales, for March and April, 2006. N S W Public Health Bull 2006; 17(5–6): 90–1.
[9] NSW Public Health Bulletin Communicable diseases report, New South Wales, for May–June 2004 N S W Public Health Bull 2006; 15(7–8): 144–5.
[10] Dalton C. Foodborne diseases surveillance in NSW: moving towards performance standards. N S W Public Health Bull 2004; 15(1–2): 2–5.
| PubMed |
[11] Mead PS, Slutsker L, Dietz V, McCaig LF, Bresee JS, Shapiro C, et al. Food related illness and death in the United States. Emerg Infect Dis 1999; 5 607–25.
| PubMed |
[12] Conlon L, Pranica K, Donart L, Proctor M, Simone M, Lucht L, et al. Norwalk-Like virus outbreaks at two summer camps – Wisconsin, June 2001. MMWR 2001; 50(30): 642–3.
| PubMed |
[13] Forssman B, Gupta L, Salmon S. Gastroenteritis outbreak at a residential college linked to a self-serve food bar. N S W Public Health Bull 2005; 16(7–8): 131–40.
| PubMed |
[14] CDC Norwalk-Like Viruses: Public health consequences and outbreak management. MMWR 2001; 50 1–18.
