Publikationsdatenbank

Analyses of intestinal commensal Escherichia coli strains from wild boars suggest adaptation to conventional pig production conditions (2012)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Römer, Antje

Wieler, Lothar H

Schierack, Peter

Quelle

Veterinary microbiology : an international journal

Bandzählung: 161

Heftzählung: 1/2

Seiten: 122 – 129

ISSN: 0378-1135

Sprache

Englisch

Verweise

DOI: 10.1016/j.vetmic.2012.07.009

Pubmed: 22857976

Kontakt

Institut für Mikrobiologie und Tierseuchen

Robert-von-Ostertag-Str. 7-13
14163 Berlin
+49 30 838 51843 / 66949
mikrobiologie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

To test the hypothesis that Escherichia coli populations have adapted to conventional pig production practices, we comparatively tested intestinal commensal E. coli from wild boars versus isolates from domestic pigs by analyzing virulence-associated factors, adhesion, and metabolic activities. Virulence-associated genes typical for intestinal pathogenic E. coli (inVAGs) were sporadically detected among E. coli from wild boars except the adhesion-related gene paa and the enterotoxin-encoding gene astA. In contrast, several VAGs typical for extraintestinal pathogenic E. coli (exVAGs) were common in E. coli from wild boars. The exVAG chuA occurred more often in E. coli from wild boars compared to E. coli from domestic pigs. 23.5% of E. coli from wild boars belonged to EcoR group B2 which is higher than observed for E. coli from clinically healthy domestic pigs. Furthermore, E. coli from wild boars were more efficient in fermentation of carbohydrate sources (dulcitol, inositol, d-sucrose, d-tagatose), and adhered better to the intestinal porcine epithelial cell line IPEC-J2. In conclusion, our findings point towards an adaptation of porcine intestinal E. coli to a specific intestinal milieu caused by different animal living conditions.