Abstract
In the cultures of numerous bacteria, and particularly in recently isolated strains, masses of fine filaments are present which are seen only in preparations stained with flagella stains. In stringy broth cultures similar filamentous structures are present. The capsule is frequently seen to consiit of a thick agglomeration of these filaments around the bacteria III certain subtilis cultures the mucoid substance which consists largely of these filaments shows phenomena suggesting that it is capable of growth independently from the bacteria.

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