For over twenty years physicians practicing in Japan have observed, in certain provinces, a peculiar cirrhosis of the liver with diarrhea, fever, anemia, ascites and edema. In some of these cases ova of an unknown parasite have been observed in the liver and other organs.
In the latter half of 1904 Katsurada1 described ova found in the feces of patients and in the tissues of men and cats. He also described the adult worms as found in the portal and mesenteric veins in cats, and called the parasite Schistosoma japonicum.
Early in 1905 Catto2 reported a case in a Chinaman from the province of Fukien. He described minutely the ova found in the tissues, and the parent worms found at the bifurcation of the smaller mesenteric vessels. Catto called the parasite Schistosoma cattoi (Blanchard). This case was previously published as one of coccidiosis in man, and again