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Study of Class 1 to 3 Integrons in Salmonella and Antimicrobial Resistance Pattern Isolated from Broiler

High prevalent of multiple drug resistant (MDR) Salmonella is considered as a threat for human’s health. Integrons are one of the most important factors that can contribute to the occurrence of MDR bacteria. The aim of this study was to determine the prevalence of class 1, 2 and 3 integrons among Salmonella strains isolated from broiler chicks. This study was performed on 100 Salmonella isolated strains, collected from male and female broiler chicks samples in southwest of Iran. The prevalence of class 1-3 integrons were verified using specific primers by multiplex PCR assay. Also antimicrobial susceptibility testing by disk diffusion method was performed for each isolate. Screening of Salmonella isolates revealed the prevalence of class 1, 2 and 3 integrons (50%), (28%) and (48%), respectively. Based on the results of this study significant correlations were between MDR and integrons, this is a serious problem in human and veterinary medicine. According to these results Ampicillin was the most resistant antibiotics against Salmonella isolated strains. The resistance to Gentamicin and Tetracycline and Chloramphenicol has increased in the presence of integrons. The presence of all three classes of integrons and its direct connection with the MDR in Salmonella is concerned.


Mehrnoosh Doosti Irani, Mostafa Faghani* and Abbas Doosti

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