<abstract xmlns="http://www.w3.org/1999/xhtml"> Background. An outbreak of gastroenteritis of etiologically unspecified origin and an outbreak of Salmonellosis occurred simultaneously in September 2011 in Tržič. The purpose of the investigation of both outbreaks was to identify the most probable source and the mode of transmission and to implement preventive measures. Methods. In two retrospective case-control studies, the association between gastroenteritis of etiologically unspecified origin or Salmonellosis and food from a restaurant or drinking tap water were tested by univariate and multivariate analysis. The subject in the first study was a sick person with salmonellosis, and the subject in the second study was a resident that developed diarrhoea and/ or vomiting. Cases were reported by doctors, and controls were selected from healthy persons who responded to the questionnaire. Results. A person exposed to food from the restaurant had a 24.8 times higher odds ratio (univariate analysis OR 24.8, 95% CI 7.5 to 82.3, p &lt;0.05; multivariate analysis OR 14.7, 95% CI 3.5 - 61.3, p &lt;0.05) for salmonellosis than non-exposed. A resident exposed to tap water from specific water source had a 3.4 times higher odds ratio (univariate analysis of OR 3.4, 95% CI 2.2 to 5.1 is p &lt;0.05, multivariate analysis of RO 2.9, 95% CI 1, 7 to 5.3, p &lt;0.05), for gastroenteritis of unspecific etiology than non-exposed. The dose response relationship was also statistically significant. Conclusion. Analytical cases - controls studies confirmed a causal relationship between salmonellosis and food from the specific restaurant and the causal relationship between gastroenteritis of etiologically unspecified origin and drinking tap water from specific water source. Salmonella enteritidis may have entered into the restaurant through tap water</abstract>

Background. An outbreak of gastroenteritis of etiologically unspecified origin and an outbreak of Salmonellosis occurred simultaneously in September 2011 in Tržič. The purpose of the investigation of both outbreaks was to identify the most probable source and the mode of transmission and to implement preventive measures. Methods. In two retrospective case-control studies, the association between gastroenteritis of etiologically unspecified origin or Salmonellosis and food from a restaurant or drinking tap water were tested by univariate and multivariate analysis. The subject in the first study was a sick person with salmonellosis, and the subject in the second study was a resident that developed diarrhoea and/ or vomiting. Cases were reported by doctors, and controls were selected from healthy persons who responded to the questionnaire. Results. A person exposed to food from the restaurant had a 24.8 times higher odds ratio (univariate analysis OR 24.8, 95% CI 7.5 to 82.3, p <0.05; multivariate analysis OR 14.7, 95% CI 3.5 - 61.3, p <0.05) for salmonellosis than non-exposed. A resident exposed to tap water from specific water source had a 3.4 times higher odds ratio (univariate analysis of OR 3.4, 95% CI 2.2 to 5.1 is p <0.05, multivariate analysis of RO 2.9, 95% CI 1, 7 to 5.3, p <0.05), for gastroenteritis of unspecific etiology than non-exposed. The dose response relationship was also statistically significant. Conclusion. Analytical cases - controls studies confirmed a causal relationship between salmonellosis and food from the specific restaurant and the causal relationship between gastroenteritis of etiologically unspecified origin and drinking tap water from specific water source. Salmonella enteritidis may have entered into the restaurant through tap water

Investigation of Two Outbreaks of Gastroenteritis in Tržič in September 2011 / Preiskava Dveh Izbruhov Gastroenteritisa V Tržiču V Septembru 2011

Health Care Centre Gorenja vas, Trata 7, 4224 Gorenja vas, Slovenia 2 National Institute of Public Health, Trubarjeva

National Institute of Public Health, Trubarjeva 2, 1000 Ljubljana, Slovenia

National Laboratory for Health, Environment and Food, Prvomajska 1, 2000 Maribor, Slovenia

Slovenian Journal of Public Health

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Background. An outbreak of gastroenteritis of etiologically unspecified origin and an outbreak of Salmonellosis occurred simultaneously in September 2011 in...

Investigation of Two Outbreaks of Gastroenteritis in Tržič in September 2011 / Preiskava Dveh Izbruhov Gastroenteritisa V Tržiču V Septembru 2011

Published Online: Dec 30, 2014

Page range: 37 - 44

Received: Jan 21, 2014

Accepted: Nov 10, 2014

DOI: https://doi.org/10.1515/sjph-2015-0005

Keywords
outbreak, gastroenteritis, Salmonella Enteritidis, epidemiology

© National Institute of Public Health, Slovenia

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Investigation of Two Outbreaks of Gastroenteritis in Tržič in September 2011 / Preiskava Dveh Izbruhov Gastroenteritisa V Tržiču V Septembru 2011

Published Online: Dec 30, 2014

Page range: 37 - 44

Received: Jan 21, 2014

Accepted: Nov 10, 2014

DOI: https://doi.org/10.1515/sjph-2015-0005

Keywordsoutbreak, gastroenteritis, Salmonella Enteritidis, epidemiology

© National Institute of Public Health, Slovenia

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
outbreak, gastroenteritis, Salmonella Enteritidis, epidemiology