Nonmotile Variants of Bacillus alvei

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Abstract
From a culture showing motile colonies on dried agar surfaces, variant daughter strains which failed to show colony motility were obtained by selective picking. Such nonmotile variants showed reversion to the motile type when aged in glucose broth. Lack of colony motility is associated with lack of demonstrable flagella, the presence of a large amt. of extracellular or capsular material, and with a granular, rather than a turbid type of growth in broth. Otherwise, the nonmotile variants were identical with the motile parent culture, even insofar as showing orientation of spores in long lateral rows.

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