Abstract
Summary
It has been shown that high speed vibration of cells of P. pestis in the presence of “ballottini” is accompanied by disintegration of the bacillary forms with concurrent release of antigenic material. At least one antigen was present in the lysed material which could not be demonstrated when cells were not lysed. 2. P. pestis and P. pseudotuberculosis appear to share 2 free “envelope” antigens as well as a single somatic antigen. In addition, it has been shown that P. pestis possesses a minimum of 1 “envelope” and 3 somatic antigens which are not shared with P. pseudotuberculosis. No antigens which could be considered specific for P. pseudotuberculosis were revealed.
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