Genotyping of Pasteurella multocida ovine and bovine isolates from Iran based on PCR-RFLP of ompH gene

Abstract

Pasteurella multocida ( P. multocida ), A Gram-negative facultative anaerobic bacterium, is a causative animal pathogen in porcine atrophic rhinitis and avian fowl cholera. The outer membrane of Gram-negative bacteria contains of many different protein in very high copy numbers. One of the major outer membrane, the H proteins have functional as high immunogenicity and antigenicity. In this study to increase information about epidemiology of ovine and bovine P. multocida , the 24 isolates from sheep and nine isolates from cattle were investigated by PCR-RFLP analysis of the ompH gene. In all 33 isolates, digestion of the amplified fragment of ompH gene by using EcoR I, cfo I and Hind III produced 3, 5 and 3 different restriction patterns respectively. Sixteen RFLP patterns were found among 33 investigated P.multocida isolates. This study showed that, the PCR RFLP based on ompH gene is potentially a useful method for typing of P. multocida isolates from sheep and cattle . The RFLP patterns of this gene exhibited extensive restriction site heterogeneity, which may be particularly suitable for fingerprinting of P. multocida isolates. Considering ompH protein as a protective immunogenic moiety of P. multocida , the results of this study showed a heterogenic bacteria and this means the possibility to produce a multivalent vaccine to be protective against diseases caused by this organism in sheep and cattle in Iran.