METABOLISM AND NUTRITION OF CLOSTRIDIUM FESERI

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Abstract
C. feseri carries out a mixed-acid and gas type of fermentation in broth or on glucose, pyruvic acid, or serine, separately. Amino acids other than serine are not fermented readily or at all either separately or when paired, as in the "Stickland reaction," with glycine or proline. C. feseri grows in an enzymatic digest of casein plus glucose enriched with biotin, nicotinic acid, pantothenic acid, and pyridoxamine, and growth is facilitated by the addition of p-aminobenzoic acid and thiamin. No growth occurs when an acid hydrolyzate of casein or a complete mixture of amino acids is substituted for the enzymatic digest, thus suggesting the need for an additional growth factor of the nature of "streptogenin.".
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