Norovirus infection diagnostic criteria

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Diagnostic criteria

Epidemiologic criteria

Epidemiologic criteria have been proposed for use in determining whether an outbreak of gastroenteritis is of viral origin. Although quite specific, these criteria are not very sensitive, and therefore the possibility of a viral etiology should not be discarded if the criteria are not met. Kaplan's criteria for this purpose are as follows:

• A mean (or median) illness duration of 12 to 60 hours
• A mean (or median) incubation period of 24 to 48 hours
• More than 50% of people with vomiting
• No bacterial agent previously found.

References

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