Molecular Typing Isolates of Salmonella Enterica Serovar Infantis Using Eric-PCR Method

Salmonella is the important bacteria of the Enterobacteriaceae family that are very diverse biochemically and serologically, and mainly transmitted through food. The spread of non-typhoid Salmonella is one of the challenging issues in current research. Therefore rapid diagnosis and typing of the pathogensprovide efficient information about detection and controlling of infection. The aim of this study is typing the clinical strains of Salmonella Infantis.
In this study, strains of Salmonella Infantis were isolated from different health centers. All of the strains were identified by standard microbiology, biochemical and molecular methods. Genetic relationship between strains was analyzed by ERIC-PCR method.
In this study, from 842 stool and blood sample of patients with diarrhea, 48 different strains were isolated which related to Salmonella Infantis. Strains categorized into 14 different groups by genotyping using ERIC-PCR method that highest number of the strains were placed in group 5 (20%, 10 strains).
Results of this study demonstrated that strains of Salmonella Infantis which are examined genetically were diverse which can be due to the prevalence of polyclonal strains in human samples. It was also shown that ERIC-PCR method has great differential power for the molecular typing.