Abstract
It was found that cells of mycoplasmas derived from human and other sources, except Mycoplasma mycoides subsp. mycoides and Mycoplasma gallisepticum, clot either citrated or haparinized plasmas of human and rabbit. The phenomenon required that mycoplasma cells contained approxi-mately more than 108 or 109 colony forming units per milliliter, depending upon the strains tested. At present, this is not useful as a marker for classification of mycoplasma. Bicchemical characteristics of the phenomenon are not clear.
