Yersinia pseudotuberculosis with limited genetic diversity is a common finding in tonsils of fattening pigs

Journal of Food Protection
T NiskanenH Korkeala

Abstract

A total of 425 pig tonsils, including 210 tonsils from fattening pigs and 215 from sows, from seven different abattoirs in Finland were studied for the occurrence of Yersinia pseudotuberculosis from 1999 to 2000. The mean prevalence of Y. pseudotuberculosis in fattening pig tonsils was 4%, varying from 0 to 10% between slaughterhouses. Y. pseudotuberculosis was not recovered from sow tonsils. All 30 Y. pseudotuberculosis isolates from eight pig tonsils were recovered after cold enrichment. Seventeen isolates from seven tonsils were found after cold enrichment for 14 days, followed by alkali treatment. Y. pseudotuberculosis was not isolated after direct plating, overnight enrichment, or selective enrichment. All 30 isolates belonged to bioserotype 2/0:3 and carried the virF gene in the virulence plasmid. The isolates exhibited calcium dependence and Congo red absorption. The pyrazinamidase test gave variable results. All isolates were characterized with pulsed-field gel electrophoresis (PFGE). Using SpeI, NotI, and XbaI enzymes, seven, five, and two different PFGE patterns were obtained, respectively. A total of 11 genotypes, gI to gXI, identified by a combination of the various SpeI, NotI, and XbaI profiles, were detected. Thre...Continue Reading

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Citations

Apr 16, 2004·Journal of Food Protection·Tiina AutioHannu Korkeala
Nov 16, 2010·Epidemiology and Infection·A BackhansS Thisted Lambertz
Dec 21, 2005·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·S Al DahoukH Neubauer
Jul 8, 2009·Foodborne Pathogens and Disease·Pilar Ortiz MartínezHannu Korkeala
Apr 14, 2006·Veterinary Research·Elisabeth M Liebler-Tenorio, Reinhard Pabst
Mar 2, 2010·Foodborne Pathogens and Disease·Pilar Ortiz MartínezHannu Korkeala
Feb 4, 2011·Foodborne Pathogens and Disease·Maria Fredriksson-AhomaaRoger Stephan
Jan 12, 2011·Journal of Food Protection·Riikka LaukkanenHannu Korkeala
Sep 8, 2012·Infection Ecology & Epidemiology·Annette Backhans, Claes Fellström
Aug 30, 2014·BMC Veterinary Research·Maialen Arrausi-SubizaMarta Barral
Jul 8, 2018·Applied and Environmental Microbiology·Marie ReinhardtStefan Hertwig
Jan 8, 2008·Epidemiology and Infection·R Rimhanen-FinneM Kuusi
Jul 22, 2008·Applied and Environmental Microbiology·Riikka LaukkanenHannu Korkeala
Jun 9, 2005·Microbiology·Victoria L TaylorPetra C F Oyston
Apr 5, 2008·Zoonoses and Public Health·T NiskanenH Korkeala
Sep 29, 2011·Environmental Microbiology·Riikka Laukkanen-NiniosMark Achtman
Aug 7, 2003·Applied and Environmental Microbiology·Taina NiskanenHannu Korkeala
Jan 22, 2010·Critical Reviews in Microbiology·Eveliina PalonenHannu Korkeala
Dec 8, 2005·Journal of Clinical Microbiology·Ekaterina VoskressenskayaElisabeth Carniel
Jun 9, 2004·Journal of Clinical Microbiology·Katri JalavaJ P Nuorti

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