[Vesiculocytosis].

Phenomenon of false plaque formation due to release of the cell contents into the surrounding environment and cell pyknosis occurred in case of replacement of physiological saline by hypertonic (10--15%) salt solutions in making the blood and tissue preparations for detection of plaque-forming cells producing autoa antibodies. This phenomenon took place with blood karyocytes of various species of animals and man with the action of different salts, for example sodium nitrate, ammonium sulphate, calcium chloride, etc. False plaque formation in hypertonic solutions failed to take place in all the cells in the preparation, i.e. depended on cell condition. This phenomenon was particularly pronounced at the period of maximal immune response of the cells.