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Cohort study of an outbreak of viral gastroenteritis in a nursing home for elderly, Majorca, Spain, February 2008

Author

Listed:
  • Luque Fernandez, M. A.
  • Galmes Truyols, A.
  • Herrera Guibert, D.
  • Arbona Cerda, G.
  • Sancho Gaya, F.

Abstract

An outbreak of acute gastroenteritis occurred in a nursing home for elderly in Majorca between 4 and 23 February 2008. To know its aetiology and mechanism of transmission a retrospective cohort study was conducted with a fixed cohort including 146 people (96 residents and 50 employees). The data were collected from clinical histories and through a survey by questionnaire. In total 71 cases were identified (53 residents, 18 employees), corresponding to an overall attack rate (AR) of 48.6%. The consumption of tap water, adjusted by age, sex and consumption of meals provided at the nursing home, presented a relative risk (RR) of 4.03 (95%CI, 1.4-11.4). The microbiological analyses confirmed the presence of norovirus and/or rotavirus in five of the seven stool samples submitted. The slow appearance of cases at the beginning of the outbreak is characteristic of a person to person transmission, while the sudden peak in the middle of the month suggests a common source such as the tap water. We therefore concluded that the outbreak likely originated from two sources: an infected employee of the nursing home and the tap water. The high number of dependent residents most probably facilitated the spread of the outbreak.

Suggested Citation

  • Luque Fernandez, M. A. & Galmes Truyols, A. & Herrera Guibert, D. & Arbona Cerda, G. & Sancho Gaya, F., "undated". "Cohort study of an outbreak of viral gastroenteritis in a nursing home for elderly, Majorca, Spain, February 2008," Working Paper 76421, Harvard University OpenScholar.
    • Handle: RePEc:qsh:wpaper:76421
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    File URL: http://scholar.harvard.edu/malf/node/76421
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    *Population Surveillance;

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