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Related Experiment Videos

Ecotoxinogenesis of Pithomyces chartarum.

J Le Bars1, E Oswald, P Le Bars

  • 1Station de Pharmacologie-Toxicologie INRA B.P.3, Toulouse, France.

Food Additives and Contaminants
|January 1, 1990
PubMed
Summary

Facial eczema is caused by sporidesmin ingestion. Toxin accumulation risk from P. chartarum occurs within a narrow temperature range (20-25°C), distinct from its growth range.

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Area of Science:

  • Mycotoxicology
  • Plant Pathology
  • Veterinary Dermatology

Background:

  • Facial eczema is a photosensitive disease caused by mycotoxins.
  • Sporidesmin, produced by P. chartarum, is the causative agent.
  • Understanding P. chartarum's growth and toxin production is crucial for prevention.

Purpose of the Study:

  • To characterize toxigenic P. chartarum strains.
  • To investigate the impact of temperature on P. chartarum growth.
  • To determine the effect of temperature on sporidesmin mycotoxin production.

Main Methods:

  • Morphological characterization of P. chartarum isolates.
  • Controlled temperature experiments to assess fungal growth.
  • Analysis of mycotoxin levels under varying temperature conditions.

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Main Results:

  • Specific morphological traits of toxigenic P. chartarum were identified.
  • P. chartarum exhibited growth between 5-30°C.
  • Significant sporidesmin accumulation occurred only between 20-25°C.

Conclusions:

  • The optimal temperature for sporidesmin accumulation is narrow (20-25°C).
  • This narrow risk window is critical for managing facial eczema outbreaks.
  • Environmental temperature significantly influences the risk of mycotoxicosis.