COMPARISON OF INFECTION FREQUENCIES IN FETUS BY MATERNAL ASCITIC CANCER AND LEUKEMIA-CELLS

It was demonstrated that material Ehrlich cells could infect in a mous e model, which is another kind of the cancer cells inducing cancer cel l infection between mother and fetus besides leukemia L615 cells repor ted previously by the authors. Among the fetus in a pregnancy only a f ew of them might be infected by the maternal cancer cells. The early a nd medial periods of pregnancy are the dangerious periods for the canc er infection. The infection frequencies for leukemia L615 cells and Eh rlich cells are 100% and 35%, respectively; but in the late period of pregnancy they are 4.5% and zero for leukemia L615 and Ehrlich cells, respectively. This indicates that the infection frequency for leukemia L615 cells is much higher than Ehrlich cells. The infection might be caused by infiltration or invasion of the cancer cells.