BOVINE

Infectious diseases remain a major cause of morbidity, mortality, and economic loss in cattle worldwide.

Understanding the key pathogens, pathophysiology, clinical presentations, diagnostic strategies, and preventive measures is critical for successful veterinary practice and essential for NAVLE success.

This section provides a focused review of the most important bovine infectious diseases, emphasizing high-yield information such as etiology, epidemiology, clinical signs, diagnostic tests, treatment options, and control programs.

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Notes:

Bovine Infectious Diseases — High-Yield NAVLE Summary for Efficient Study

Bovine infectious diseases are among the most heavily tested topics on the NAVLE, and understanding their clinical presentations, transmission pathways, diagnostic patterns, and control strategies is essential for exam success. Many of these conditions share overlapping signs—respiratory disease, diarrhea, reproductive loss—so test takers must differentiate them based on hallmark features, etiologic agents, age of affected animals, and specific risk factors.

Listeriosis in Cattle

Listeriosis is a significant bacterial disease in cattle caused by Listeria monocytogenes, a facultative intracellular pathogen found in silage, soil, and water. It primarily affects the brainstem, leading to neurologic signs, but can also cause septicemia and abortion.