High incidence of norovirus GII.4 outbreaks in hospitals and nursing homes in Catalonia (Spain), 2010–2011

A descriptive study was performed between 1 January 2010 and 31 December 2011 to estimate the incidence of norovirus outbreaks in hospitals and nursing homes in Catalonia (Spain). Epidemiological surveys were done for each outbreak. Norovirus was confirmed using RT–PCR. The incidence of outbreaks/10...

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Bibliographic Details
Published in:Epidemiology and infection 2015-03, Vol.143 (4), p.725-733
Main Authors: GODOY, P., FERRRUS, G., TORNER, N., CAMPS, N., SALA, M.R., GUIX, S., BARTOLOMÉ, R., MARTÍNEZ, A., SIMÓN, M. DE, DOMÍNGUEZ, A.
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Caliciviridae Infections - epidemiology
Caliciviridae Infections - mortality
Caliciviridae Infections - transmission
Cross Infection - epidemiology
Cross Infection - mortality
Cross Infection - transmission
Cross Infection - virology
Disease Outbreaks - statistics & numerical data
Female
Gastroenteritis
Hospital-acquired infections
Hospitals - statistics & numerical data
Humans
Incidence
Laboratories
Male
Microbiology
Norovirus
Nosocomial infections
Nursing homes
Nursing Homes - statistics & numerical data
Original Papers
Patients
Population
Public health
Spain - epidemiology
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Summary:A descriptive study was performed between 1 January 2010 and 31 December 2011 to estimate the incidence of norovirus outbreaks in hospitals and nursing homes in Catalonia (Spain). Epidemiological surveys were done for each outbreak. Norovirus was confirmed using RT–PCR. The incidence of outbreaks/106 person-years by centre, and the attack rate, were calculated. Statistically significant differences were calculated using odds ratio (ORs) and 95% confidence intervals (CIs). Person-to-person transmission was responsible for 81·5% (22/27) of outbreaks. The incidence in the population was 156·7 outbreaks/106 person-years. The incidence by centre was 1·3% per year and was greater in hospitals (2·6%) than in nursing homes (0·9%) (OR 3·2, 95% CI 1·5–6·9). The global attack rate in residents and staff was 34·7% (816/2348). The mortality rate was 0·25% (2/816). Genogroup GII.4 caused 66·7% of outbreaks. Norovirus GII.4 outbreaks cause significant morbidity affecting both patients and staff.
ISSN:0950-2688
1469-4409
DOI:10.1017/S0950268814001204