The levels of zearalenone and its metabolites in plasma, urine and faeces of horses fed with naturally, Fusarium toxin-contaminated oats.
- Clinical Trial
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
This study investigates the presence and levels of a toxin called zearalenone and its byproducts in horses that were fed oats contaminated with this Fusarium-produced toxin. It was found that varying levels of the toxin and its metabolites were present in the plasma, urine, and faeces of the horses. The results suggested that horses are less susceptible to the adverse effects of this toxin as their bodies convert it differently than other animals, such as pigs.
Study Methodology and Results
The research process involved feeding horses with oats that had been naturally contaminated with a Fusarium toxin, specifically zearalenone (ZON). Samples of plasma, urine, and faeces were collected and then analyzed. The findings from these analyses showed that:
- A high concentration of a ZON metabolite known as β-zearalenol (β-ZOL) was identified in plasma on the tenth day of the study, with levels ranging between 3.21-6.24 μg/l.
- Major metabolites found in the urine were β-ZOL and α-zearalenol, two forms of ZON after it has been processed by the body.
- Zearalanone, another ZON metabolite, was detected in both urine and faeces, with concentrations of 1.34-5.79 μg/l and 1 μg/kg respectively.
- ZON, α-ZOL, and β-ZOL were mostly found in faecal samples.
- Glucuronidation, which is the addition of glucuronic acid to a substance to facilitate its excretion from the body, was essentially 100% in both urine and plasma samples. However, low levels of glucuronidation (4-15%) were noted in faecal samples.
Interpretation and Implications of the Results
The result of this study suggests the principal conversion of ZON into β-ZOL in horses. This aspect is crucial because it may explain why horses are not as susceptible to ZON as other animals like swine are. For example, in swine, ZON is predominantly converted into α-ZOL, a different metabolite.
The research sheds light on how different organisms metabolize the same toxin in different ways, which may confer varying levels of susceptibility to the toxin’s potential harms. By providing insights into how horses process ZON, the study contributes to a wider understanding of equine health and nutrition, as well as the impact of mycotoxin-contaminated feeds on livestock health more generally.
Cite This Article
Publication
Researcher Affiliations
- Institute of Animal Nutrition, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, Veterinä rplatz 1,Vienna, Austria.
MeSH Terms
- Animals
- Feces / chemistry
- Female
- Fusarium / metabolism
- Horses / blood
- Horses / metabolism
- Horses / urine
- Species Specificity
- Zearalenone / blood
- Zearalenone / chemistry
- Zearalenone / metabolism
- Zearalenone / urine
Citations
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