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Related Experiment Video

Updated: Dec 8, 2025

Catheterization of Intestinal Loops in Ruminants

Catheterization of Intestinal Loops in Ruminants

Published on: June 11, 2009

Selenosis in Ruminants.

Merl F Raisbeck¹

¹Department of Veterinary Sciences, College of Agriculture, University of Wyoming, 2852 Riverside, Laramie, WY 82070, USA.

The Veterinary Clinics of North America. Food Animal Practice

|September 18, 2020

Summary

Selenium (Se) is a vital nutrient and potential toxicant. Overuse of Se supplements commonly causes selenosis, requiring laboratory confirmation due to overlapping symptoms with deficiency. Prevention involves managing exposure and diet.

Area of Science:

Environmental Science
Toxicology
Nutritional Science

Background:

Selenium (Se) is a metalloid with critical roles as both a nutrient and a toxicant.
The narrow margin between adequate and excessive intake highlights its dual nature.
Pure selenium exists in various physical forms, but its biological effects are of primary concern.

Purpose of the Study:

To elucidate the risks associated with selenium (Se) toxicity, particularly selenosis.
To emphasize the diagnostic challenges due to overlapping symptoms of Se deficiency and toxicity.
To outline preventative strategies against Se toxicity.

Main Methods:

Literature review on selenium's properties, toxicity, and deficiency.
Analysis of common causes and manifestations of selenosis.

Keywords:

Ruminants Selenium Selenosis Toxicology

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Examination of diagnostic criteria and preventative measures for selenium toxicity.

Main Results:

Overuse of selenium supplements is the primary cause of selenosis.
Symptoms of Se toxicity often mimic those of Se deficiency, necessitating laboratory confirmation.
Effective prevention strategies include limiting exposure to seleniferous sources and managing dietary factors.

Conclusions:

Selenium's dual role as nutrient and toxicant requires careful management of intake.
Accurate diagnosis of Se toxicity relies on laboratory testing to differentiate from deficiency.
Preventing selenosis involves controlling environmental and dietary exposure to selenium.