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Generalized tuberculosis in a 45 day-old calf
1Ankara University, Faculty of Veterinary Medicine, Department of Pathology, Ankara, Turkey. svural@veterinary.ankara.edu.tr
DTW. Deutsche Tierarztliche Wochenschrift
|January 5, 2002
Summary
This study details the pathomorphological and immunohistochemical findings of generalized tuberculosis in a young calf. Mycobacterium bovis antigens were identified within macrophages in various organs and lymph nodes.
Area of Science:
- Veterinary Pathology
- Immunohistochemistry
- Bovine Tuberculosis
Background:
- Tuberculosis remains a significant global disease affecting various animal species.
- Generalized tuberculosis in young calves presents diagnostic challenges.
- Understanding the pathomorphological and immunohistochemical features is crucial for accurate diagnosis and control.
Observation:
- A 45-day-old female calf presented with generalized natural tuberculosis.
- Characteristic productive lesions were observed in the lungs, liver, and multiple lymph nodes.
- Affected lymph nodes included mediastinal, bronchial, mesenteric, portal, prescapular, renal, and caudal sternal nodes.
Findings:
- Immunohistochemistry revealed Mycobacterium bovis antigens primarily within the cytoplasm and surrounding macrophages.
- Antigens were occasionally detected in necrotic areas and Langhans giant cells.
- The avidin-biotin complex peroxidase method was employed for antigen visualization.
Implications:
- This case highlights the importance of thorough pathological examination in young animals with suspected tuberculosis.
- Immunohistochemistry aids in confirming Mycobacterium bovis presence and localization.
- Findings contribute to the understanding of bovine tuberculosis pathogenesis and diagnostic approaches.