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Generalized tuberculosis in a 45 day-old calf.

S A Vural¹, R Tunca

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.

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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.

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