Virulence of Avian Serotype A۱ Pasteurella multocida for Chickens and Mice.

The virulence of Pasteurella multocida (P. multocida) serotype A۱ for chickens and mice was determined. Groups of chicken and mice were exposed intramuscularly and intraperitoneally to various concentration of P. multocida broth culture, respectively. This strain was highly virulent for chickens so that those exposed to only ۷ c.f.u. of the organism died in less than ۲۴ hours. Groups of mice exposed to the virulent strain died during ۴۸ hours post inoculation. Microbiological examination resulted in the isolation of P. multocida from exposed chicken and mice. No isolation was made from unexposed control groups. The result indicates that the isolate is highly virulent for both chickens and mice.

کلیدواژه ها:

fowl cholera ، Pasteurella multocida ، virulence ، chickens ، Mice