[Lymphocyte helper function in intact mice in relation to macrophage phagocytic activity].

The results of the studies aimed at the determination of the presence of lymphocytes, influencing the phagocytic activity of macrophages, among the cells of the peritoneal cavity, the spleen and the thymus in intact CBA mice are presented. Macrophages cultivated together with the nonadhering cells of peritoneal exudate were found to possess greater phagocytic activity in comparison with macrophages free of nonadhering cells. The nonadhering cells and splenocytes were also found to possess helper activity with respect to the phagocytic activity of macrophages: their addition to washed out macrophages increased the phagocytic index. Thymocytes showed no such activity.