MOTILE ENTEROCOCCI ( STREPTOCOCCUS FAECIUM VAR. MOBILIS VAR. N.) ISOLATED FROM GRASS SILAGE

Motile enterococci (Streptococcus faecium var. mobilis var. n.) isolated from grass silage.

Hugh (1959) recently reported on motile enterococci isolated from human sources. He pointed out that motile strains in the genus Streptococcus are considered rare, and suggested that they have gone unrecognized simply because investigators have failed to examine for motility and flagella. Actually many strains of motile streptococci have been isolated and studied and the reader is referred to H...

Streptococcus faecium var. casselifavus, nov. var.

Streptococcus faecium var. casseliflavus is a gram-positive, spherical cell. The cells occur chiefly as pairs within chains and elongate to ogive-shaped cells during growth. Growth is good on 5% bile salts-agar and in broth at 10 C, and in broth adjusted to pH 9.6 or containing 6.5% NaCl, but many strains fail to grow at 45 C. Litmus is reduced rapidly prior to formation of an acid curd. Few st...

Strain variation within Streptococcus faecium var. durans.

Folate reductase and specific dihydrofolate reductase activities of the amethopterin-sensitive Streptococcus faecium var. durans.

Preliminary evidence is presented that indicates that the dihydrofolate reductase activity of amethopterin-sensitive Streptococcus faecium var. durans ATCC 8043 is separable into two dihydrofolate reductases, one of which also reduces folate.

Evidence of genetic transformation in Streptococcus faecium var. durans (SF-O).

A number of species in the genus Streptococcus have been shown to undergo deoxyribonucleic acid (DNA)-mediated transformation. The first report of transformation in two strains of "viridans" streptococci was by R. M. Bracco et al. (J. Exptl. Med. 106:247, 1957). Following this, R. Pakula and associates (Bull. Acad. Polon. Sci., Ser. Sci. Biol. 6:319, 1958; Schweiz. Z. Allgem. Pathol. Bakteriol....