Differences in strains of Trichomonas vaginalis as revealed by intraperitoneal injections into mice.

the mouse as an experimental animal for Trichomonas vaginalis. Lesions due to the parasite have resulted following injection by subcutaneous, intramuscular, and intraperito4eal routes (Schnitzer et al, 1950, and Iwai, 1957); in the latter case, fatal infections have also developed (Hamada, 1953, 1956, and Inoki and Hamada, 1953). The mouse has also provided evidence for differences in the virulence of strains of T.