Studies on Pasteurella gallinarum
Avian Pathology : Journal of the W.V.P.A
|January 1, 1977
Summary
This study identified two distinct Pasteurella gallinarum serotypes in chickens, one unrelated to Pasteurella multocida and another related to P. multocida serotypes 6 and 9. Chickens developed antibodies against P. gallinarum infection.
Area of Science:
- Veterinary Microbiology
- Avian Pathology
Background:
- Pasteurella gallinarum infections in chickens can cause swollen and inflamed wattles.
- Understanding P. gallinarum serotypes is crucial for diagnosing and managing avian diseases.
Purpose of the Study:
- To characterize Pasteurella gallinarum strains isolated from chicken disease outbreaks.
- To determine the antigenic relationship between P. gallinarum serotypes and Pasteurella multocida.
Main Methods:
- Bacteriological isolation and identification of 42 P. gallinarum strains.
- Serotyping using the gel diffusion precipitin test.
- Detection of agglutinating and precipitating antibodies in infected chicken sera.
Main Results:
- Two distinct serotypes of P. gallinarum were identified.
- One serotype was antigenically unrelated to Pasteurella multocida.
- The second serotype showed antigenic relation to Pasteurella multocida serotypes 6 and 9.
- Significant antibody titers were detected in infected chickens.
Conclusions:
- P. gallinarum exhibits antigenic diversity, with at least two distinct serotypes.
- Some P. gallinarum serotypes share antigens with P. multocida, complicating diagnosis.
- Chickens mount an antibody response to P. gallinarum infection.
