Related Experiment Videos
Correlation of microbiological and histological findings in bovine fibrinous pneumonia
Abstract:
In a retrospective morphological and microbiological study, 39 of 55 cases of bovine fibrinous pneumonia were diagnosed as fibrinous pleuropneumonia. Twenty-nine of these 39 (74%) were associated with Pasteurella hemolytica, but only two cases (5%) with P. multocida. In contrast, of the 16 cases classified as fibrinous bronchopneumonia, one (6%) was associated with P. hemolytica, and nine (56%) with P. multocida. In eight cases Mycoplasma and Hemophilus somnus were found in association with either P. hemolytica or P. multocida but were never isolated alone. We concluded that the use of the term pasteurellosis, implying Pasteurella as the cause, is imprecise because lesions associated with P. hemolytica fulfill the criteria of a fibrinous pleuropneumonia, whereas P. multocida is more likely to cause a bronchopneumonia with moderate amounts of fibrin.
Insights
Bovine fibrinous pneumonia diagnosis varies by pathogen. Pasteurella hemolytica causes fibrinous pleuropneumonia, while Pasteurella multocida is linked to fibrinous bronchopneumonia in cattle.
Area of Science:
- Veterinary Pathology
- Bovine Respiratory Diseases
- Microbiology
Background:
- Fibrinous pneumonia is a significant respiratory condition in cattle.
- Accurate etiological diagnosis is crucial for effective treatment and control.
Purpose of the Study:
- To differentiate between fibrinous pleuropneumonia and fibrinous bronchopneumonia in cattle.
- To correlate specific Pasteurella species with distinct pathological findings.
Main Methods:
- Retrospective analysis of bovine cases.
- Morphological examination of lung tissues.
- Microbiological isolation and identification of causative agents.
Main Results:
- 39 of 55 cases were diagnosed as fibrinous pleuropneumonia, predominantly associated with Pasteurella hemolytica (74%).
- 16 cases were classified as fibrinous bronchopneumonia, with Pasteurella multocida being the more frequent isolate (56%).
- Mycoplasma and Hemophilus somnus were found as secondary or concurrent infections.
Conclusions:
- The term 'pasteurellosis' is imprecise for bovine respiratory disease.
- Pasteurella hemolytica is strongly associated with fibrinous pleuropneumonia.
- Pasteurella multocida is more commonly implicated in fibrinous bronchopneumonia with fibrin in cattle.