In present study, the prevalence and infection rate of Campylobacter spp. was assessed in 1800 samples; 360 ruminant in the Chaharmahal and Bakhtiari province, over a 12-month period between September 2018 and September 2019. Samples were more contaminated with Campylobacter jejuni (3.2%), than with Campylobacter coli (2.5%). Of 114 isolates of Campylobacter shown resistance to one or more of the twelve antimicrobials compared with 64 (79.2%) of 114 isolates of C. jejuni .The frequency of resistance between isolated ones was statistically significant across divisions. Overall, the resistance was in greater rate to Tetracycline (65.7%) and Ciprofloxacin (50.0%) and lowest to Imipenem (2.6%) and the differences were significant (P < 0.05).The presence of the cadF , flaA, cdtB, cdtA, cdtC among 64 C. jejuni and 45 C. coli isolates was identified by PCR method. The high prevalence of five virulence genes indicates that these putative pathogenics determinants are widespread among Campylobacter which isolates from ruminant such as cows, goats and sheep.
Key words: Campylobacter jejuni, PCR, Virulence gene, Antimicrobial resistance.
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