Abstract
AbstractThe “paper disc plate” method of antibiotic assay usingBacillus megaterium spores was tested for the assay of aflatoxins and related compounds. Significant inhibitions were obtained in the range of 1–4 µg/disc for aflatoxin B1 and 4–8 µg/disc for aflatoxin G1. Dicumarol was the most active of the compounds tested and inhibited at 0.1–1.0 µg/disc. Compounds were also tested using nine‐day‐old chick embryos. It was found that embryos incubated in egg cartons were much more sensitive to toxins than eggs incubated on cotton padding or in a commercial egg incubator. The LD100 of aflatoxin B1 to carton‐incubated embryos was 0.01 µg, while to embryos from the commercial incubator the LD100 was >5.0 µg. The results of the two bioassay procedures did not correlate completely with each other.
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