پديد آورندگان :
Sakhravi، Ahmad نويسنده Department of Microbiology, Faculty of Sciences, Islamic Azad University, Karaj Branch, Karaj, Iran Sakhravi, Ahmad , Asli، Esmaile نويسنده Department of Microbiology, Faculty of Sciences, Islamic Azad University, Karaj Branch, Karaj, Iran Asli, Esmaile , Feizabadi، Mohammad-Mehdi نويسنده Department of Microbiology, Tehran University of Medical Sciences, Tehran, Iran Feizabadi, Mohammad-Mehdi , Movahedi، Abdolreza نويسنده Department of Microbiology, Razi Vaccine & Serum Research Institute, Tehran University of Medical Sciences, Tehran, Iran Movahedi, Abdolreza , Ranjbar، Reza نويسنده , , Ketabi، Hosnieh نويسنده Department of Microbiology, Faculty of Sciences, Islamic Azad University, Karaj Branch, Karaj, Iran Ketabi, Hosnieh , Rafiee، Behnam نويسنده Department of Microbiology, Islamic Azad University, Qom Branch, Qom ,Iran Rafiee, Behnam
چكيده لاتين :
Background: PFGE facilitates the differential migration of large DNA fragments through agarose gel by constantly changing the direction of the electrical field during electrophoresis. Possibility of high difference between strains and repeatability make PFGE one of the strong molecular methods in study of bacterial strains in epidemiology. To identifying and DNA fingerprinting of vaccine strain of Clostridium tetani by PFGE technique. Also, possibility of genotyping profile changes in frequency of vaccine strain of C. tetani during the period of 1990 to 2011.
Materials and Methods: The vaccine strain of C. tetani was provided by Razi Vaccine and Serum Research Institute in Karaj. The seeds were inoculated into Columbia blood agar and grown for 72 h. The cultures were incubated at 35°C in anaerobic conditions. The PFGE analyses were performed using genomic DNA digested with the restriction enzyme SmaI. The electrophoresis analyses were carried out on a CHEF DR III apparatus (Bio-Rad) and band patterns obtained were then analyzed.
Results: The PFGE profile obtained from vaccine strain during a period of more than two decades revealed no remarkable genetic changes and mutations. This type of analysis provides detailed data useful for surveillance of vaccine strains and isolates as well as for the selection of certain predominant profiles for further investigation.
Conclusion: This study showed no considerable change in chromosomal genome of Harvard, the vaccine strain. It is therefore concluded that the vaccine produced by Razi Institute had evidently no alteration or modification in accordance to PFGE profile analysis during a period of more than two decades.
