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Epidemiol Infect. 2000 Feb;124(1):121-30.

Hepatitis A in New South Wales, Australia from consumption of oysters: the first reported outbreak.

Author information

1
AIDS/Infectious Diseases Branch, NSW Health Department, North Sydney, Australia.

Abstract

Between 22 January and 4 April 1997, 467 hepatitis A cases were reported to the New South Wales Health Department, Australia. To identify the cause of the outbreak, we conducted a matched case-control study, and an environmental investigation. Among 66 cases and 66 postcode-matched controls, there was a strong association between illness and consumption of oysters (adjusted odds ratio 42; 95 % confidence interval 5-379). More than two-thirds of cases reported eating oysters, including one third of cases and no controls who reported eating oysters in the Wallis Lake area. A public warning was issued on 14 February, and Wallis Lake oysters were withdrawn from sale. Hepatitis A virus was subsequently identified in oyster samples taken from the lake. Hepatitis A virus poses a special risk to consumers who eat raw oysters because it can survive for long periods in estuaries and cause severe disease.

PMID:
10722139
PMCID:
PMC2810892
DOI:
10.1017/s0950268899003386
[Indexed for MEDLINE]
Free PMC Article

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