Aspergillus flavus

Aspergillus flavus is a very widespread mould, Cosmopolite (ground, organic matters in decomposition, oilseeds seeds, cereals). It is particularly abundant on groundnuts and his derivatives, one also finds it in the tropical areas on the Niébé S (beans of Senegal) and rice.

Aspergillus flavus is the principal producer of Aflatoxines B1 (most important), B2, G1 and G2. Aflatoxine B1 is currently regarded as the most important carcinogenic agent of natural origin known. Others Mycotoxines are produced: Acid aspergillic, Acid kojic (very toxic for the animals), Flavicine, Flavicidine, Granegilline, Orizazine, Acid flavicidic (phytotoxic), Acid β propionic, tremorgenic Substance. Certain stocks can also produce cyclopiazonic Acide. There exist regulatory maximum contents according to the products.

Conditions of development

  • optimum T° of growth: about 33°C, t°min. : 10-12°C, t°max.: 43-48°C
  • Aw minimal: 0.78 with 33°C, 0.80 with 37°C
    • optimum
  • pH of growth: 3.4; 10 with a peak with 7.5.

Discovered aspergillus flavus on the lungs of a penguin. Continuations of necropsy and culture in medium. (LabVetSur, Arequipa-Peru)

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