[Ultrastructural studies on differentiation and proliferation of mouse peritoneal macrophages (author's transl)].

Mouse peritoneal macrophages show considerable variations of the cell structure, but 98% of macrophages clearly differ from the other peritoneal exsudate cells. This part is reduced too 96% after i.p. injection of erythrocytes. The nature of the unclassified cells is discussed. A local proliferation is observed in 1% of peritoneal macrophages after injection of sheep erythrocytes, auto-erythrocytes and 0,9% NaC1-solution. After erythrocyte injection the proliferation begins with delay in time at the end of intracellular digestion.