title: An outbreak of food poisoning due to a genogroup I norovirus.
abstract: Norovirus infection is associated with approximately 90% of epidemic non-bacterial acute gastroenteritis. The objective of this study is to describe an outbreak of norovirus genogroup I gastroenteritis which affected workers in a hospital and was attributed to food prepared by an infected food handler. Forty cases were detected, of whom 80% were interviewed. The index case was the cook employed in the hospital cafeteria. The following symptoms were observed: abdominal pain in 90.6%, vomiting in 71.9%, diarrhoea in 71.9%, general indisposition in 62.5%, headaches in 53.1% and fever in 32.4% of cases. The initial symptoms were abdominal pain in 37% and vomiting in 28%. Of the 14 samples analysed by RT-PCR, 12 (86%) were positive for a genogroup I norovirus. After sequencing the strain was identified as genotype Desert Shield. Many of the foodstuffs consumed were made by hand, favouring transmission from the index case to the cafeteria users.
authors.affiliation: Epidemiological Surveillance Unit of the Central Region, Terrassa, Spain
authors.forename: M R
authors.initials: MR
authors.lastname: Sala
authors.forename: N
authors.initials: N
authors.lastname: Cardeñosa
authors.forename: C
authors.initials: C
authors.lastname: Arias
authors.forename: T
authors.initials: T
authors.lastname: Llovet
authors.forename: A
authors.initials: A
authors.lastname: Recasens
authors.forename: A
authors.initials: A
authors.lastname: Domínguez
authors.forename: J
authors.initials: J
authors.lastname: Buesa
authors.forename: L
authors.initials: L
authors.lastname: Salleras
mesh_terms: D000328:Adult; D017250:Caliciviridae Infections / Q000453:epidemiology*; D004196:Disease Outbreaks; D005260:Female; D005506:Food Contamination; D005511:Food Handling; D005517:Foodborne Diseases / Q000453:epidemiology* / Q000821:virology*; D005759:Gastroenteritis / Q000453:epidemiology* / Q000821:virology*; D005838:Genotype; D006801:Humans; D008297:Male; D029322:Norovirus / Q000235:genetics*; D013030:Spain / Q000453:epidemiology