Whole-genome Sequencing Used to Investigate a Nationwide Outbreak of Listeriosis Caused by Ready-to-eat Delicatessen Meat, Denmark, 2014.

Autor:	Kvistholm Jensen A; Department of Infectious Disease Epidemiology Department of Microbiology and Infection Control, Statens Serum Institut., Nielsen EM; Department of Microbiology and Infection Control, Statens Serum Institut., Björkman JT; Department of Microbiology and Infection Control, Statens Serum Institut., Jensen T; Department of Danish Veterinary and Food Administration, Copenhagen., Müller L; Department of Infectious Disease Epidemiology., Persson S; Department of Microbiology and Infection Control, Statens Serum Institut., Bjerager G; Department of Danish Veterinary and Food Administration, Copenhagen., Perge A; Department of Danish Veterinary and Food Administration, Copenhagen., Krause TG; Department of Infectious Disease Epidemiology., Kiil K; Department of Microbiology and Infection Control, Statens Serum Institut., Sørensen G; Department of National Food Institute, Technical University of Denmark, Lyngby., Andersen JK; Department of National Food Institute, Technical University of Denmark, Lyngby., Mølbak K; Department of Infectious Disease Epidemiology., Ethelberg S; Department of Infectious Disease Epidemiology Department of Microbiology and Infection Control, Statens Serum Institut.
Jazyk:	angličtina
Zdroj:	Clinical infectious diseases : an official publication of the Infectious Diseases Society of America [Clin Infect Dis] 2016 Jul 01; Vol. 63 (1), pp. 64-70. Date of Electronic Publication: 2016 Mar 29.
DOI:	10.1093/cid/ciw192
Abstrakt:	Background: Listeriosis is a serious foodborne infection. Outbreaks of listeriosis occur rarely, but have often proved difficult to solve. In June 2014, we detected and investigated a listeriosis outbreak in Denmark using patient interviews and whole-genome sequencing (WGS). Methods: We performed WGS on Listeria monocytogenes isolates from patients and available isolates from ready-to-eat foods and compared them using single-nucleotide polymorphism (SNP) analysis. Case patients had L. monocytogenes with ≤3 SNPs (the outbreak strain) isolated in September 2013-December 2014. Through interviews, we established case patients' food and clinical histories. Food production facilities were inspected and sampled, and we performed trace-back/trace-forward of food delivery chains. Results: In total, 41 cases were identified; 17 deaths occurred (41%). An isolate from a delicatessen meat (spiced meat roll) from company A was identical to the outbreak strain. Half of the patients were infected while hospitalized/institutionalized; institutions were supplied food by company A. The outbreak strain was repeatedly isolated from further samples taken within this company and within companies in its distribution chain. Products from company A were traced and recalled from >6000 food establishments, after which the outbreak ended. Conclusions: Ready-to-eat spiced meat roll from a single production facility caused this outbreak. The product, served sliced and cold, is popular among the elderly; serving it at hospitals probably contributed to the high case-fatality rate. WGS used for patient isolates and isolates from food control inspections, coupled with routine epidemiological follow-up, was instrumental in swiftly locating the source of infections, preventing further illnesses and deaths. (© The Author 2016. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail journals.permissions@oup.com.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu