A norovirus outbreak associated with consumption of NSW oysters: implications for quality assurance systems.

Clare Huppatz, Sally A Munnoch, Tory Worgan, Tony D Merritt, Craig Dalton, Paul M Kelly, David N Durrheim
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Abstract

Norovirus is a common cause of gastroenteritis outbreaks associated with raw shellfish consumption. In Australia there have been several reports of norovirus outbreaks associated with oysters despite the application of regulatory measures recommended by Food Standards Australia New Zealand. This study describes an outbreak of norovirus gastroenteritis following the consumption of New South Wales oysters. In September 2007, OzFoodNet conducted a cohort study of a gastroenteritis outbreak amongst people that had dined at a Port Macquarie restaurant. Illness was strongly associated with oyster consumption, with all cases having eaten oysters from the same lease (RR undefined, p < 0.0001). Norovirus was detected in a faecal specimen. Although no pathogen was identified during the environmental investigation, the source oyster lease had been closed just prior to harvesting due to sewage contamination. Australian quality assurance programs do not routinely test oysters for viral contamination that pose a risk to human health. It is recommended that the feasibility of testing oysters for norovirus, particularly after known faecal contamination of oyster leases, be assessed.

与新南威尔士州牡蛎消费有关的诺如病毒爆发:对质量保证系统的影响。
诺如病毒是与食用生贝类有关的肠胃炎暴发的常见原因。在澳大利亚,尽管采用了澳大利亚和新西兰食品标准局建议的监管措施,但仍有几起与牡蛎有关的诺如病毒爆发的报告。本研究描述了在食用新南威尔士牡蛎后爆发的诺如病毒肠胃炎。2007年9月,OzFoodNet对在麦夸里港一家餐厅用餐的人群中爆发的肠胃炎进行了一项队列研究。疾病与牡蛎消费密切相关,所有病例都吃了同一租约的牡蛎(RR未定义,p < 0.0001)。在粪便标本中检测到诺如病毒。虽然在环境调查期间没有发现病原体,但由于污水污染,牡蛎源租约在收获之前已经关闭。澳大利亚的质量保证项目并没有对牡蛎进行常规的病毒污染检测,以免对人体健康造成威胁。建议评估对牡蛎进行诺如病毒检测的可行性,特别是在已知的牡蛎粪便污染之后。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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