Bovine Vitamin and Mineral Deficiencies Study Guide

Overview and Clinical Importance

Vitamin and mineral deficiencies are among the most economically significant health conditions affecting cattle worldwide. These deficiencies can manifest as dramatic clinical syndromes or as subclinical conditions that reduce productivity, impair immunity, and increase susceptibility to other diseases. Understanding the pathophysiology, clinical presentation, and management of these conditions is essential for the NAVLE.

The major deficiency syndromes covered include selenium/vitamin E deficiency (white muscle disease), copper deficiency, hypomagnesemia (grass tetany), polioencephalomalacia (thiamine-responsive or sulfur-induced), vitamin A deficiency, phosphorus deficiency, iodine deficiency, and cobalt/zinc deficiencies. Regional soil characteristics significantly influence which deficiencies predominate in different geographic areas.

Selenium and Vitamin E Deficiency (White Muscle Disease)

White muscle disease (WMD), also called nutritional myodegeneration or nutritional muscular dystrophy, is caused by deficiency of selenium, vitamin E, or both. It represents one of the most important nutritional deficiencies in cattle, particularly in selenium-deficient regions.