Horlbog, Jule Anna; Stephan, Roger; Stevens, Marc J. A.; Overesch, Gudrun; Kittl, Sonja; Napoleoni, Maira; Silenzi, Valentina; Nüesch-Inderbinen, Magdalena; Albini, Sarah (2021). Feedborne Salmonella enterica Serovar Jerusalem Outbreak in Different Organic Poultry Flocks in Switzerland and Italy Linked to Soya Expeller. Microorganisms, 9(7), p. 1367. MDPI 10.3390/microorganisms9071367
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Overesch_Gudrun_Feedborne_Salmonella_enterica.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (588kB) | Preview |
Poultry feed is a leading source of Salmonella infection in poultry. In Switzerland, heat-treated feed is used to reduce Salmonella incursions into flocks in conventional poultry production. By contrast, organic feed is only treated with organic acids. In 2019, the Swiss National Reference Center for Enteropathogenic Bacteria identified the rare serovar S. Jerusalem from samples of organic soya feed. Further, in July 2020, the European Union’s Rapid Alert System for Food and Feed published a notification of the detection of S. Jerusalem in soya expeller from Italy. During 2020, seven S. Jerusalem isolates from seven different poultry productions distributed over six cantons in Switzerland were reported, providing further evidence of a possible outbreak. Using whole-genome sequencing (WGS), S. Jerusalem isolates from feed and from animals in Switzerland were further characterized and compared to S. Jerusalem from organic poultry farm environments in Italy. WGS results showed that feed isolates and isolates from Swiss and Italian poultry flocks belonged to the sequence type (ST)1028, grouped in a very tight cluster, and were closely related. This outbreak highlights the risk of spreading Salmonella by feed and emphasizes the need for a heat-treatment process for feed, also in organic poultry production.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Veterinary Bacteriology 05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Small Animal Clinic |
UniBE Contributor: |
Overesch, Gudrun, Kittl, Sonja Cornelia |
Subjects: |
500 Science > 570 Life sciences; biology 500 Science > 590 Animals (Zoology) 600 Technology > 610 Medicine & health 600 Technology > 630 Agriculture |
ISSN: |
2076-2607 |
Publisher: |
MDPI |
Language: |
English |
Submitter: |
Pamela Schumacher |
Date Deposited: |
28 Jan 2022 10:55 |
Last Modified: |
05 Dec 2022 16:00 |
Publisher DOI: |
10.3390/microorganisms9071367 |
PubMed ID: |
34201865 |
BORIS DOI: |
10.48350/163643 |
URI: |
https://boris.unibe.ch/id/eprint/163643 |
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