[The effect of the preparation Kurasan (ethoxyquin) on the toxigenic properties of the mold Aspergillus flavus].

The effects of Kurasan antioxidant (min. 78% ethoxyquin) were studied on toxin formation of the fungus Aspergillus flavus (strain AF 1982/M1). Aflatoxins mostly of type B1, G1, M1 are produced by the mentioned fungal strain. The strain was cultivated for seven days at high relative humidity on a substrate mostly of cereals (Karlovarské suchary--Carlsbad rusks). Application of 25 mg Kurasan per 1 kg substrate reduced type G1 aflatoxin formation by 90%. The total production of aflatoxins decreased expressively (by 50-60% after addition of 100-200 mg Kurasan per 1 kg substrate). It was only at high amounts of Kurasan that B1 and M1 aflatoxin formation was inhibited and it was correlated. Positive effects of Kurasan antioxidant applied to feed mixtures were demonstrated--aflatoxin formation by toxicogenic fungi is inhibited.