Bovine Plant Toxicosis Study Guide

Overview and Clinical Importance

Plant toxicosis represents one of the most significant causes of morbidity and mortality in cattle worldwide. The economic impact includes direct losses from death, decreased production, reproductive failure, and veterinary treatment costs. Understanding the major toxic plants, their mechanisms of action, clinical presentations, and management strategies is essential for the NAVLE examination and clinical practice.

Plant poisonings in cattle commonly occur during periods of forage scarcity, drought, overgrazing, or when toxic plants contaminate hay or silage. The clinical manifestations vary widely depending on the toxin involved, ranging from acute death to chronic organ damage.

1. Nitrate and Nitrite Poisoning

Nitrate poisoning is the most common cause of plant-related toxicosis in cattle, particularly in regions with intensive agricultural production.