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Stojević, Dora; Humski, Andrea; Mikulić, Marina; Dobranić, Vesna; Reil, Irena; Duvnjak, Sanja; Benić, Miroslav; Beck, Relja; Cvetnić, Željko
Journal of veterinary research 66, Številka: 3Journal Article
is present in the normal intestinal flora but some strains can cause intestinal and extraintestinal diseases, and research on its presence in food of animal origin is in the interests of public health. This study was designed to characterise strains according to their origin, their carriage of virulence genes specific for certain pathogroups, and phylogenetic group affiliation. The study was carried out on 100 strains isolated from food samples of various animal origin as well as pig and cattle carcass swabs. Isolation of the strains was performed using two methods. One method included colony count and the other an overnight enrichment of the samples. Isolation was followed by DNA extraction and detection of virulence genes and phylogenetic group with conventional and multiplex PCRs. In this study, the most prevalent gene was (20%) and strains which carried it were identified as enteroadherent . Other pathogroups were represented in lower incidences. Phylogenetic group analysis revealed the prevalence of the A and B1 groups, with B1 mainly present in game and cattle strains, while the majority of pig and poultry strains were assigned to group A. This study provides an overview of the presence of potentially pathogenic strains and phylogenetic groups in Croatia, for which the data are limited. Further microbiological and molecular research is required to examine the epidemiological situation in the country.
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