Tags

Type your tag names separated by a space and hit enter

Salmonellosis outbreak due to Salmonella enteritidis phage type 14b resistant to nalidixic acid, Austria, September 2010.
Euro Surveill. 2011 Aug 25; 16(34)ES

Abstract

We report on a salmonellosis-outbreak due to Salmonella Enteritidis phage type 14b resistant to nalidixic acid (S. Enteritidis PT14b Nx) among residents and employees of a student residence in Austria, September 2010. The outbreak was described and analysed by a retrospective cohort study, and microbiological environmental investigations were conducted to identify the outbreak source(s) and the reservoir of the outbreak strain. A total of 66 persons fulfilled the outbreak case definition including 14 laboratory-confirmed cases. Food specific cohort-analyses by day revealed that consumption of potato salad (RR: 1.65, 95%CI: 1.35–2.01, p=0.001) and a cheese-sausage cold plate (RR: 2.24, 95%CI: 1.29–3.88, p=0.002) on 14 September was associated with being an outbreak case. We hypothesised that cross-contamination with S. Enteritidis PT14b Nx positive eggs had occurred during preparation of the potato salad and cold plate as a result of preparing in parallel egg-containing breaded cutlets on 14 September. A traced laying hen holding in eastern Austria was identified as the sole source of the consumable eggs in the student residence. By applying the legally mandated sampling method for epidemiological-related laying hen farms (one pooled dust sample à 150g, two paired boot swabs cultured separately), the outbreak strain could not be detected. Our findings, that legally required sampling methods for laying hen farms failed to detect the causative pathogen in a laying hen holding, despite an epidemiological link, underline the request stated by the European Food Safety Authority Panel on Biological Hazards for a more sensitive sampling plan in epidemiologically-associated laying hen flocks.

Authors+Show Affiliations

Austrian Agency for Health and Food Safety (Osterreichische Agentur fur Gesundheit und Ernahrungssicherheit, AGES), Vienna, Austria.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21903036

Citation

Hrivniaková, L, et al. "Salmonellosis Outbreak Due to Salmonella Enteritidis Phage Type 14b Resistant to Nalidixic Acid, Austria, September 2010." Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin, vol. 16, no. 34, 2011.
Hrivniaková L, Schmid D, Luckner-Hornischer A, et al. Salmonellosis outbreak due to Salmonella enteritidis phage type 14b resistant to nalidixic acid, Austria, September 2010. Euro Surveill. 2011;16(34).
Hrivniaková, L., Schmid, D., Luckner-Hornischer, A., Lassnig, H., Kornschober, C., Angermayer, J., & Allerberger, F. (2011). Salmonellosis outbreak due to Salmonella enteritidis phage type 14b resistant to nalidixic acid, Austria, September 2010. Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin, 16(34).
Hrivniaková L, et al. Salmonellosis Outbreak Due to Salmonella Enteritidis Phage Type 14b Resistant to Nalidixic Acid, Austria, September 2010. Euro Surveill. 2011 Aug 25;16(34) PubMed PMID: 21903036.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Salmonellosis outbreak due to Salmonella enteritidis phage type 14b resistant to nalidixic acid, Austria, September 2010. AU - Hrivniaková,L, AU - Schmid,D, AU - Luckner-Hornischer,A, AU - Lassnig,H, AU - Kornschober,C, AU - Angermayer,J, AU - Allerberger,F, Y1 - 2011/08/25/ PY - 2011/9/10/entrez PY - 2011/9/10/pubmed PY - 2012/1/4/medline JF - Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin JO - Euro Surveill VL - 16 IS - 34 N2 - We report on a salmonellosis-outbreak due to Salmonella Enteritidis phage type 14b resistant to nalidixic acid (S. Enteritidis PT14b Nx) among residents and employees of a student residence in Austria, September 2010. The outbreak was described and analysed by a retrospective cohort study, and microbiological environmental investigations were conducted to identify the outbreak source(s) and the reservoir of the outbreak strain. A total of 66 persons fulfilled the outbreak case definition including 14 laboratory-confirmed cases. Food specific cohort-analyses by day revealed that consumption of potato salad (RR: 1.65, 95%CI: 1.35–2.01, p=0.001) and a cheese-sausage cold plate (RR: 2.24, 95%CI: 1.29–3.88, p=0.002) on 14 September was associated with being an outbreak case. We hypothesised that cross-contamination with S. Enteritidis PT14b Nx positive eggs had occurred during preparation of the potato salad and cold plate as a result of preparing in parallel egg-containing breaded cutlets on 14 September. A traced laying hen holding in eastern Austria was identified as the sole source of the consumable eggs in the student residence. By applying the legally mandated sampling method for epidemiological-related laying hen farms (one pooled dust sample à 150g, two paired boot swabs cultured separately), the outbreak strain could not be detected. Our findings, that legally required sampling methods for laying hen farms failed to detect the causative pathogen in a laying hen holding, despite an epidemiological link, underline the request stated by the European Food Safety Authority Panel on Biological Hazards for a more sensitive sampling plan in epidemiologically-associated laying hen flocks. SN - 1560-7917 UR - https://www.unboundmedicine.com/medline/citation/21903036/Salmonellosis_outbreak_due_to_Salmonella_enteritidis_phage_type_14b_resistant_to_nalidixic_acid_Austria_September_2010_ L2 - http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=19952 DB - PRIME DP - Unbound Medicine ER -