Department of Bacteriology, Razi Vaccine and Serum Research Institute, Shiraz, Iran
During one year period from 2010 to 2011 the samples from pneumonic animals were taken and transported to the laboratory. Pasteurella multocida were identified in 16.6% of animal by biochemical test. The high incidence of P. multocida was obtained in the south of Fars province, where the area was warm region. The Mean Death Time between the isolates was 12-18 and 19-24 hours. Only the capsular type A was identified in all the isolates and it is agreement with the finding by others, they indicated type A is the dominant type of Pasteurella multocia in tropical and sub tropical climate.