Abstract
Summary
1. At a certain level of sulfonamide resistance properties characteristic of enterococci were acquired by 4 strains of S. mitis. 2. Increased resistance to sulfonamides was accompanied by increased resistance to penicillin, streptomycin, bacitracin, and aureomycin in all 4 strains. The resistance of these trained1 strains to the antibiotics and sulfathiazole was similar to that of a strain of S. fecalis. 3. Acquisition of ability to grow on bile or in high concentrations of streptomycin did not generally produce the biochemical properties of enterococci, nor resistance to sulfathiazole or to the antibiotics.
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