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Lesions associated with Pasteurella multocida infection in raptors
T Y Morishita1, L J Lowenstine, D C Hirsh
1Department of Veterinary Preventive Medicine, College of Veterinary Medicine, Ohio State University, Columbus 43210-1092, USA.
Avian Diseases
|January 1, 1997
Summary
Avian cholera, caused by Pasteurella multocida, presents unique esophageal abscesses in Buteo hawks, unlike in owls or falcons. This finding aids in diagnosing P. multocida infections in these raptors.
Area of Science:
- Veterinary Pathology
- Avian Diseases
- Microbial Pathogenesis
Background:
- Pasteurella multocida is a known pathogen in raptors, but its associated pathologic syndromes require further description.
- Avian cholera is a significant disease affecting various bird species, including birds of prey.
Purpose of the Study:
- To describe the lesions associated with avian cholera in raptors.
- To identify unique clinical presentations of Pasteurella multocida infection in different raptor groups.
Main Methods:
- Retrospective case review of 22 avian cholera cases in raptors.
- Gross and histopathological examination of affected birds.
- Identification of specific lesions and their distribution among raptor orders and families.
Main Results:
- Septicemia-related lesions were common in all affected raptors.
- Esophageal abscesses were observed in 73% of Buteo hawks but not in Strigiformes or Falconidae.
- The study documented new avian cholera cases in a rough-legged hawk and a flammulated owl.
Conclusions:
- Esophageal abscesses, presenting as white plaques in the oropharynx and esophagus, are a distinctive sign of P. multocida infection in Buteo hawks.
- These findings enhance the differential diagnosis for P. multocida in Buteo hawks.
- The study expands the known host range for avian cholera within raptors.