PURE CULTIVATION OF SPIROCHAETA REFRINGENS.
A strain of Spirochoeta refringens has been obtained in pure culture, and its morphological and cultural characteristics have been studied. The strain possessed no pathogenicity for rabbits or monkeys. It probably belongs to the genus Treponema, but it is easily differentiated from Treponema pallidum, Treponema microdentium, and Treponema macrodentium. Its relation to Spirochoeta balanitidis and Spirochoeta buccalis is still undetermined.
Laboratories of The Rockefeller Institute for Medical Research, New York.
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Noguchi