An outbreak of norovirus infection in an Italian residential-care facility for the elderly

Maria Cristina Medici, A. Morelli, M. C. Arcangeletti, A. Calderaro, F. De Conto, M. Martinelli, L. A. Abelli, G. Dettori, C. Chezzi

Research output: Contribution to journalArticlepeer-review

Abstract

On December 2006, an outbreak of gastroenteritis occurred at a residential-care facility for the elderly in northern Italy. Thirty-five of 61 individuals interviewed (attack rate, 57.4%) fell ill. In 94.3% of cases, the onset of illness was within 48h of a Christmas party at the facility. Norovirus (NoV) was detected by RT-PCR in 24 of 31 individuals examined, including three asymptomatic food-handlers, in whom there was evidence of long-lasting excretion of viral particles. The identification of a sequence referring to the '2006a GII.4 NoV variant' in all examined strains supported the hypothesis of a common point source. This retrospective cohort study is the first report on an outbreak of NoV gastroenteritis in an Italian residential-care facility for the elderly.

Original languageEnglish
Pages (from-to)97-100
Number of pages4
JournalClinical Microbiology and Infection
Volume15
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • Asymptomatic infection
  • Norovirus outbreak
  • Residential-care facility
  • Sequence analysis
  • Virus shedding

ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases

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