title: Multiple clusters of norovirus among shellfish consumers linked to symptomatic oyster harvesters.
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.
authors.affiliation: British Columbia Centre for Disease Control, Vancouver, British Columbia, Canada. lorraine.mcintyre@bccdc.ca
authors.forename: Lorraine
authors.initials: L
authors.lastname: McIntyre
authors.forename: Eleni
authors.initials: E
authors.lastname: Galanis
authors.forename: Kirsten
authors.initials: K
authors.lastname: Mattison
authors.forename: Oksana
authors.initials: O
authors.lastname: Mykytczuk
authors.forename: Enrico
authors.initials: E
authors.lastname: Buenaventura
authors.forename: Julie
authors.initials: J
authors.lastname: Wong
authors.forename: Natalie
authors.initials: N
authors.lastname: Prystajecky
authors.forename: Mark
authors.initials: M
authors.lastname: Ritson
authors.forename: Jason
authors.initials: J
authors.lastname: Stone
authors.forename: Dan
authors.initials: D
authors.lastname: Moreau
authors.forename: André
authors.initials: A
authors.lastname: Youssef
mesh_terms: D000818:Animals; D001955:British Columbia / Q000453:epidemiology; D017250:Caliciviridae Infections / Q000453:epidemiology*; D016000:Cluster Analysis; D004196:Disease Outbreaks; D005506:Food Contamination / Q000032:analysis*; D005759:Gastroenteritis / Q000453:epidemiology*; D006801:Humans; D029322:Norovirus / Q000302:isolation & purification*; D010125:Ostreidae / Q000821:virology*; D012758:Shellfish / Q000821:virology*