en تخصصي Special Original article Original article <p style="text-align: justify;"><span style="font-family:times new roman;"><strong>Background:</strong> <em>Salmonella</em> is one of the causes of food-borne illnesses worldwide resulting in a wide range of human diseases. The aim of this research was to study molecular epidemiology and antimicrobial resistance of <em>Salmonella</em> spp. isolated from resident patients in Mazandaran province, northern Iran.</span></p> <p style="text-align: justify;"><span style="font-family:times new roman;"><strong>Methods:</strong> Totally, 51 stool samples were collected from patients in 20 outbreaks recorded in Health Care Center of Mazandaran province, North of Iran, during October 2013 to September 2014. Cultivation and biochemical methods were used for differentiation of <em>Salmonella</em>. Identified <em>Salmonella</em> isolates were confirmed with 16S rRNA PCR method and sequencing. Antibiotic susceptibility test was carried out for each isolate.</span></p> <p style="text-align: justify;"><span style="font-family:times new roman;"><strong>Results: </strong>Four of 51 samples (7.84%) were contaminated with <em>S. enteritidis.</em> Molecular analysis and sequencing verified the isolates. The delineation level for each isolate discrimination in subsequent analysis was set at 94% for the primer. All of the isolates were resistant to tetracycline, nalidixic acid, and trimethoprim-sulfamethoxazole. No resistance was found to cefotaxime, chloramphenicol, ciprofloxacin, amoxicillin, and ceftazidime.</span></p> <p style="text-align: justify;"><span style="font-family:times new roman;"><strong>Conclusion: </strong><em>S. enteritidis</em> was the most frequent serovar among salmonellosis outbreaks in the Mazandaran province, Iran. Also, isolated <em>S. enteritidis</em> showed various rates of susceptibility for different antibiotics.</span></p> Salmonella, Molecular Epidemiology, Iran 146 151 http://jfqhc.ssu.ac.ir/browse.php?a_code=A-10-1-134&slc_lang=en&sid=1 M.M. Soltan Dallal soltanda@sina.tums.ac.ir Yes Division of Food Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran M. Khalilian No Division of Food Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran H. Masoumi Asl No Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran R. Bakhtiari No Division of Microbiology, Department of Pathobiology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran A. Davoodabadi No Department of Microbiology, Medical School, Babol University of Medical Sciences, Babol, Iran M.K. Sharifi Yazdi No Zoonosis Research Center, Tehran University of Medical Sciences, Tehran, Iran P. Torabi Bonabi No Food Microbiology Research Center, Tehran University of Medical Sciences, Tehran, Iran