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Epidemiologic and Molecular Trends of “Norwalk-like Viruses” Associated with Outbreaks of Gastroenteritis in the United States

Epidemiologic and Molecular Trends of “Norwalk-like Viruses” Associated with Outbreaks of... Between July 1997 and June 2000, fecal specimens from 284 outbreaks of nonbacterial gastroenteritis were submitted to the Centers for Disease Control and Prevention for testing for “Norwalk-like viruses” (NLVs). Specimens were examined by reverse-transcription polymerase chain reaction and direct electron microscopy for the presence of NLVs. Adequate descriptive data were available from 233 of the outbreaks, and, of these, 217 (93%) were positive for NLVs. Restaurants and events with catered food were the most common settings, and contaminated food was the most common mode of transmission. Genogroup II (GII) strains were the predominant type (73%), with genogroup I strains causing 26% of all NLV-positive outbreaks. Certain GII clusters (GII/1,4,j) were more commonly associated with outbreaks in nursing home settings than with outbreaks in other settings. Strain diversity was great: one potential new sequence cluster was implicated in multiple outbreaks, and strains belonging to a tentative new genogroup were identified http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Infectious Diseases Oxford University Press

Epidemiologic and Molecular Trends of “Norwalk-like Viruses” Associated with Outbreaks of Gastroenteritis in the United States

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References (22)

Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
Subject
Major Articles
ISSN
0022-1899
eISSN
1537-6613
DOI
10.1086/341085
pmid
12089655
Publisher site
See Article on Publisher Site

Abstract

Between July 1997 and June 2000, fecal specimens from 284 outbreaks of nonbacterial gastroenteritis were submitted to the Centers for Disease Control and Prevention for testing for “Norwalk-like viruses” (NLVs). Specimens were examined by reverse-transcription polymerase chain reaction and direct electron microscopy for the presence of NLVs. Adequate descriptive data were available from 233 of the outbreaks, and, of these, 217 (93%) were positive for NLVs. Restaurants and events with catered food were the most common settings, and contaminated food was the most common mode of transmission. Genogroup II (GII) strains were the predominant type (73%), with genogroup I strains causing 26% of all NLV-positive outbreaks. Certain GII clusters (GII/1,4,j) were more commonly associated with outbreaks in nursing home settings than with outbreaks in other settings. Strain diversity was great: one potential new sequence cluster was implicated in multiple outbreaks, and strains belonging to a tentative new genogroup were identified

Journal

Journal of Infectious Diseases – Oxford University Press

Published: Jul 1, 2002

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