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Fowl cholera.

J P Christensen1, M Bisgaard1

  • 1Department of Veterinary Microbiology, Royal Veterinary and Agricultural University, Frederiksberg C, Denmark.

Revue Scientifique Et Technique (International Office of Epizootics)
|August 10, 2000
PubMed
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Fowl cholera, caused by Pasteurella multocida, has complex epidemiology and variable virulence. Molecular typing reveals wild birds as potential reservoirs, and carrier birds play a significant role in transmission.

Area of Science:

  • Veterinary Microbiology
  • Avian Pathology

Background:

  • Pasteurella multocida subspecies multocida is the primary cause of fowl cholera.
  • Virulence factors and epidemiological complexities of P. multocida infections remain incompletely understood.
  • Infections vary in severity due to host, environmental, and bacterial strain factors.

Purpose of the Study:

  • To elucidate the virulence properties of different P. multocida subspecies.
  • To investigate the complex epidemiology of fowl cholera.
  • To identify factors influencing P. multocida infection severity and transmission.

Main Methods:

  • Review of existing literature on P. multocida virulence factors and epidemiology.
  • Application of molecular typing methods to avian P. multocida strains.

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  • Analysis of diagnostic approaches for P. multocida infections.

    • Main Results:

    • Virulence factors like capsule, endotoxin, and P. multocida exotoxin (PMT) may contribute to pathogenicity.
    • Molecular typing suggests wild birds as a potential source of infection for poultry.
    • Carrier birds are significant in disease transmission, with subclinical infections posing a risk.

    Conclusions:

    • Control of fowl cholera is challenged by complex epidemiology and the limitations of current vaccines.
    • Further research is needed to understand the role of asymptomatic carriers and develop effective control strategies.
    • Integrated management and vaccination approaches are crucial for preventing P. multocida introduction and spread.