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Objective  The aim of this study was to investigate the genetic relatedness and antimicrobial resistance among  Shigella  species isolated from food and stool samples. Using cross sectional study method,  Shigella  spp. were isolated from food and clinical samples using culture-based, biochemical and serological methods. Antimicrobial susceptibility and genetic relatedness among the isolates were evaluated using disk diffusion and RAPD-PCR methods respectively.    Results  The prevalence of  Shigella  spp. were 4.84 and 7.7% in food and stool samples respectively. All food isolates were  Sh. sonnei . 91.42% of the  Shigella  stool isolates were  Sh. sonnei . 62.5% of food isolates were resistant to tetracycline. 46.8, 50 and 65.8% of clinical isolates were resistant to imipenem, amikacin and azithromycin respectively. 50 and 85.7% of the food and clinical isolates respectively were MDR. Dendrogram generated by RAPD-PCR showed that the isolates from food and stool samples were categorized in a same group. Close genetic relatedness between MDR Shigella isolates from food and clinical samples indicate that foods can be considered as one of the main vehicles for transmission of MDR  Shigella  to human causing acute diseases. Survey of MDR  Shigella  among food and clinical samples is strongly suggested to be implemented.

Antibiotic susceptibility and genetic relatedness of Shigella species isolated from food and human stool samples in Qazvin, Iran