Multiple Clusters of Norovirus among Shellfish Consumers Linked to Symptomatic Oyster Harvesters

Author:

McINTYRE LORRAINE1,GALANIS ELENI1,MATTISON KIRSTEN2,MYKYTCZUK OKSANA2,BUENAVENTURA ENRICO3,WONG JULIE4,PRYSTAJECKY NATALIE45,RITSON MARK6,STONE JASON7,MOREAU DAN8,YOUSSEF ANDRÉ9,

Affiliation:

1. 1British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada

2. 2Health Canada, Ottawa, Ontario, Canada

3. 3Canadian Food Inspection Agency, Ottawa, Ontario, Canada

4. 4British Columbia Centre for Disease Control Public Health Microbiology and Reference Laboratory, Vancouver, British Columbia, Canada

5. 5Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada

6. 6Vancouver Coastal Health Authority, Vancouver, British Columbia, Canada

7. 7Fraser Health Authority, Surrey, British Columbia, Canada

8. 8Vancouver Island Health Authority, Victoria, British Columbia, Canada

9. 9Canadian Food Inspection Agency, Burnaby, British Columbia, Canada

Abstract

We describe the investigation of a norovirus outbreak associated with raw oyster consumption affecting 36 people in British Columbia, Canada, in 2010. Several genotypes were found in oysters, including an exact sequence match to clinical samples in regions B and C of the norovirus genome (genogroup I genotype 4). Traceback implicated a single remotely located harvest site probably contaminated by ill shellfish workers during harvesting activities. This outbreak resulted in three recalls, one public advisory, and closure of the harvest site.

Publisher

International Association for Food Protection

Subject

Microbiology,Food Science

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