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Studies on the Coccaceae. X. The motility of certain cocci



Studies on the Coccaceae. X. The motility of certain cocci



New York geneva Agric Exp Sta Tech Bulletin 136 1 18 1 Pl 1928 Also in Centralbl Bakt etc I Abt Orig 111(4/5): 161-166



A study was made of 150 strains of micrococci, sarcinae and streptococci in an effort to discover actively motile types among the Coccaceae. Four strains were found to be actively motile, 3 of which were micrococci. Flagella were demonstrated on 3 of these cultures, using a modification of the Plimmer and staining method. Planosarcina ureae Beijerinck was actively motile and flagella which could be easily stained were found at all stages of growth. Micrococcus agilis Ali-Cohen was also found actively motile but flagella were not demonstrated, as the culture agglutinated when brought in contact with the mordant. No characters were found which correlate with motility, indicating that not all of the motile cocci should be placed in a separate genus. However, P. ureae Beijerinck and M. agilis Ali-Cohen should be considered as distinct species, while the 2 other motile micrococci should be included as motile varieties of M. citreus and M. flavus.

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