Salmonella enterica subspecies enterica serovar Choleraesuis in a wild boar population in Germany
Methner, U (Ulrich) | Heller, Martin | Bocklisch, Herbert
Salmonella (S.) enterica subspecies enterica serovar Choleraesuis, the swine-adapted serovar is found rarely in Western European countries including Germany. However, the regional laboratory of the federal state Thuringia in Germany examined diseased wild boars routinely also for the occurrence of Salmonella organisms. Between 2006 and 2008, only the serovar S. Choleraesuis was islolated from 24 animals, three strains isolated from domestic pigs were included. In order to detect a possible epidemiological context, the strains of S. Choleraesuis were characterised by macrorestriction and plasmid analysis, repetitive sequence PCR, antimicrobial testing and determining the biochemical profile. A combination of all methods enabled the identification of five epidemiological groups. Two groups were detected in the same territory but three other discriminative groups were predominant in different regions. S. Choleraesuis strains of the different epidemiological groups circulate in wild boar populations in the corresponding regions. However, it could be concluded that both natural barriers like mountains and artificial barriers like arterial roads may cause the separation of wild boar populations and as a result also the respective S. Choleraesuis organisms. The occurrence of the identical epidemiological groups in wild boars and domestic pigs indicates the possible mutual exposure of the pathogen. To avoid risks for human and domestic pig health regular inspection of meat from wildlife by official veterinarians and advice of hunters and persons who prepare and consume wild boar meat should be enhanced.
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