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Strains of Clostridium botulinum types A, B and F were grown aerobically in metabiotic association with several aerobic and facultative microorganisms. In unbuffered media Enterococcus faecalis and Pediococcus cerevisiae produced enough acid to prevent toxin formation by C. botulinum but in buffered media toxin was formed. Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Yersinia enterocolitica, strains of Serratia, Pseudomonas, Alcaligenes and 35 unidentified strains from mechanically deboned chicken homogenate produced conditions favorable for toxin production under aerobic conditions. The metabiotes did not inhibit spore formation nor did toxin production correlate with the appearance of spores.
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Charles N. Huhtanen (1990) studied this question.
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