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Int. J. Environ. Res. Public Health 2010, 7(7), 2822-2827; doi:10.3390/ijerph7072822

The Incidence of Norovirus-Associated Gastroenteritis Outbreaks in Victoria, Australia (2002–2007) and Their Relationship with Rainfall

Victorian Infectious Diseases Reference Laboratory, 10 Wreckyn Street, North Melbourne, Victoria 3051, Australia
Author to whom correspondence should be addressed.
Received: 20 May 2010 / Revised: 21 June 2010 / Accepted: 2 July 2010 / Published: 5 July 2010
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The relationship between the incidence of norovirus-associated gastroenteritis outbreaks (NAGOs) in Victoria, Australia for the period 2002–2007 and rainfall was examined. Statistical analysis involving the correlation between time series indicated that there was a statistically significant (p < 0.05) correlation between monthly NAGO incidence and average monthly rainfall. There was a lag of an average of about three months between peak average rainfall and a NAGO epidemic. The findings thus indicate rainfall can influence NAGO incidence. In an era where there is concern about the potential effects of global warming on weather patterns, it should be borne in mind that future changes in NAGO incidence may reflect altered world weather patterns.
Keywords: norovirus; rainfall; lag; outbreaks norovirus; rainfall; lag; outbreaks
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Bruggink, L.D.; Marshall, J.A. The Incidence of Norovirus-Associated Gastroenteritis Outbreaks in Victoria, Australia (2002–2007) and Their Relationship with Rainfall. Int. J. Environ. Res. Public Health 2010, 7, 2822-2827.

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