A method of mass cultivation of Toxoplasma gondii in cell culture.

Large quantities of Toxoplasma gondii were cultivated in human larynx carcinoma cells (H.Ep 2, heteroploid). Virulent Toxoplasma gondii, strain RH, which were obtained from the peritoneal exsudate of mice 2 days after infection served as inoculum. As culture medium for the cells and for growth medium, Minimum Essential Medium (MEM) supplemented by 5% foetal calf serum and 200,000 IE/1 Penicillin plus 20 mg/1 Sulmycin was used. 2--3 days after inoculation, 150--200 times the amount of the inoculated Toxoplasmas could be harvested in one or several harvests.