Related Experiment Videos
Pasteurella multocida infection in the chicken embryo
R S Ibrahim1, T Sawada, S el-Ballal
1Nippon Veterinary and Animal Science University, Department of Veterinary Microbiology, Tokyo, Japan.
Journal of Comparative Pathology
|July 4, 1998
Summary
This study investigated Pasteurella multocida infection in chicken embryos and adult chickens, revealing strain-specific virulence and lesion development. Findings highlight bacterial interactions within host tissues, impacting cellular structures and overall embryo survival.
Area of Science:
- Veterinary Microbiology
- Pathology
- Infectious Diseases
Background:
- Pasteurella multocida is a significant avian pathogen.
- Understanding its virulence factors and host-pathogen interactions is crucial for disease control.
Purpose of the Study:
- To evaluate Pasteurella multocida strain virulence using embryonated chicken eggs and adult chickens.
- To characterize the pathological changes and bacterial localization within host tissues.
Main Methods:
- Inoculation of embryonated chicken eggs and 6-week-old chickens with different Pasteurella multocida strains.
- Macroscopic and microscopic examination of lesions.
- Transmission electron microscopy to visualize bacterial presence and cellular damage.
Main Results:
- Significant differences in lesion severity and mortality were observed among Pasteurella multocida strains.
- Virulent strains showed less dose-dependent responses compared to low-virulence strains.
- Lesions included vascular involvement, thickened chorio-allantoic membranes, enlarged yolk sacs, and intracellular bacterial multiplication in various tissues.
Conclusions:
- Embryonated chicken eggs are a suitable model for studying Pasteurella multocida virulence.
- Bacterial intracellular replication in host cells contributes to severe tissue damage and pathogenesis.
- Strain variation significantly influences Pasteurella multocida pathogenicity in avian hosts.