SUMMARY During growth in broth, Bacillus anthracis strain 2160 s became capsulated only towards the end of exponential growth. An inoculum of fully capsulated organisms formed chains which were non-capsulated save at their tips and at occasional junctions between neighbouring cells. This appearance suggested that new non-capsulated wall was synthesized at the equator of each organism but not at the poles or throughout the existing wall.
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Meynell et al. (1965) studied this question.