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PR toxin is one of several Penicillium toxins, and species of Penicillium have been found as a major contaminant in silage.

Species Producing PR Toxin

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PR toxin is produced by Penicillium roqueforti and is one of several mycotoxins produced by Penicillium.

Occurrence of PR Toxin

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Penicillium species are abundant in silage and have been found in both corn and grass silage.

Regulation of PR Toxin

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The U.S. Food and Drug Administration has no regulations or guidelines on PR toxin in animal feeds.

Toxicosis

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The effects of PR toxin in cattle are not well defined in the literature. PR toxin is suggested to be the causative agent associated with health issues from consuming moldy corn silage and has been suspected as the potential cause of abortion. Other Penicillium mycotoxins in silage have been associated with herd health problems, including reduced milk production, rumen dysfunction, and acidosis-like symptoms. However, studies have reported that PR toxin does not interfere with rumen fermentation and is undetectable after 48 hours. Interactions with other toxins may cause the symptoms associated with Penicillium mycotoxins.

Authors

Assistant Professor and Extension Specialist
Animal Science
Graduate Assistant
Animal Science
Graduate Assistant
Animal Science

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Publication date: Aug. 23, 2021
AG-907

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