Toxic metabolite produced by Aspergillus wentii

Area of Science:

• Mycology
• Food Science
• Toxicology

Background:

• Aspergillus wentii is a fungal species sometimes found in food products.
• Previous research has not fully characterized the toxic potential of this specific strain.

Purpose of the Study:

• To investigate the toxicity of an Aspergillus wentii strain isolated from country-cured ham.
• To identify and characterize the toxic compound produced by the fungus.

Main Methods:

• Mycelial extracts and moldy food samples were tested for toxicity in chicken embryos and mice.
• Purification of the toxic compound was achieved using thin-layer chromatography and crystallization.
• Spectroscopic analysis (UV-Vis) and melting point determination were performed on the purified compound.

Main Results:

• Mycelial extracts were highly toxic to chicken embryos and mice.
• Moldy corn and rice showed lower toxicity.
• Purification yielded toxic orange-red crystals with a melting point of 285-286°C and specific UV-Vis absorption maxima.
• The toxic component caused zero hatchability in fertile eggs at 50 µg/egg.

Conclusions:

• Aspergillus wentii isolated from country-cured ham produces a highly toxic compound.
• The toxic compound is a crystalline substance with specific physical and chemical properties.
• Further research is needed to determine the chemical structure and toxicological implications of this compound.