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Journal of animal science1992; 70(12); 3928-3933; doi: 10.2527/1992.70123928x

Clinical assessment of selenium status of livestock.

Abstract: Assessment of the selenium status of livestock is an important aspect of production medicine, but variations in reported values between laboratories and between methods may be > 30%. Reliable interpretations require considerable experience with an assay and an extensive database from field and research case samples of a variety of species. The Michigan State University Animal Health Diagnostic Laboratory (MSU-ADHL) has offered Se analyses by acid-digestion and fluorometric detection since 1982. This laboratory expects serum Se values (nanograms per milliliter) of livestock to increase gradually with age from starting ranges for neonates of 50 to 80 for calves and sheep and 70 to 90 for foals and pigs. Expected or "normal" values for the adults are in the ranges of 70 to 100 for cattle, 120 to 150 for sheep, 130 to 160 for horses, and 180 to 220 for swine. Normal liver Se concentrations are considered to range between 1.2 and 2.0 micrograms/g on a dry weight basis, regardless of the species or age. Based on samples submitted to MSU-AHDL between September 1990 and August 1991, contemporary feeding practices in the Michigan area resulted in mean serum Se values (nanograms per milliliter) of 75 +/- 19 for adult Holsteins, 170 +/- 27 for adult swine (mixed breeds), and 137 +/- 30 for adult race horses. Within that period of time, two field cases of Se toxicity were diagnosed. One involved feeder pigs with a recorded high serum Se value of 1,525 ng/mL due to a commercial premix manufacturing error.(ABSTRACT TRUNCATED AT 250 WORDS)
Publication Date: 1992-12-01 PubMed ID: 1474029DOI: 10.2527/1992.70123928xGoogle Scholar: Lookup
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Summary

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This research paper discusses the challenges and findings in assessing selenium status in livestock, citing variable results in methods and laboratories and reporting normal selenium values for different species based on studies from Michigan State University’s Animal Health Diagnostic Laboratory.

Understanding the Importance of Selenium Assessment

  • The research highlights the key role of selenium in the livestock production process. Assessing the selenium status of livestock is essential in production medicine as it affects the livestock’s overall performance and health.
  • However, the difficulty in selenium assessment lies in the variations of reported values between different laboratories and methodologies. In some cases, the discrepancies can be over 30%, indicating a lack of standardization in selenium assessment.
  • The proficiency in interpreting these results depends largely on one’s experience with an assay and a comprehensive database from field and research case samples across a variety of species.

Michigan State University Animal Health Diagnostic Laboratory Findings

  • The MSU-AHDL has been conducting selenium analyses via acid-digestion and fluorometric detection since 1982. The research presents their findings on expected selenium values in livestock.
  • According to MSU-AHDL, serum selenium values for newborn livestock such as calves, sheep, foals, and pigs, are expected to gradually increase with their age. They provided specific ranges for these values, starting from 50 ng/mL for newborn livestock and going up to 220 ng/mL for adult swine.
  • It is also stated that the normal liver selenium concentrations should be between 1.2 and 2.0 micrograms/g on a dry weight basis, regardless of the species or age of the livestock.
  • The study also provides data on average serum selenium values recorded in the Michigan area based on dietary practices among several species of livestock.

Identifying Selenium Toxicity

  • The paper also mentioned two field cases of selenium toxicity confirmed within the time frame of the study. One case was involving feeder pigs that showed spectacularly high serum selenium values, reaching 1,525 ng/mL, due to an error in manufacturing of selenium premix used in their feed.
  • This discovery emphasizes the necessity for careful selenium administration in livestock to avoid harmful toxicity levels that may severely impact the health and wellbeing of the animals.

Cite This Article

APA
Stowe HD, Herdt TH. (1992). Clinical assessment of selenium status of livestock. J Anim Sci, 70(12), 3928-3933. https://doi.org/10.2527/1992.70123928x

Publication

ISSN: 0021-8812
NlmUniqueID: 8003002
Country: United States
Language: English
Volume: 70
Issue: 12
Pages: 3928-3933

Researcher Affiliations

Stowe, H D
  • Department of Large Animal Clinical Sciences, Michigan State University, East Lansing 48824.
Herdt, T H

    MeSH Terms

    • Aging / metabolism
    • Animals
    • Animals, Domestic / blood
    • Animals, Domestic / metabolism
    • Cattle / blood
    • Horse Diseases / chemically induced
    • Horses / blood
    • Liver / chemistry
    • Reference Values
    • Selenium / analysis
    • Selenium / blood
    • Selenium / poisoning
    • Sheep / blood
    • Swine / blood
    • Swine Diseases / chemically induced

    References

    This article includes 33 references

    Citations

    This article has been cited 15 times.
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