Fig. 182.—Schistosoma japonicum: section through the gut of a Chinaman showing eggs. × 58. (After Catto.)
Gut.—The eggs in the mucosa and submucosa cause catarrh and destruction of tissue or new growth. In the small intestine the eggs are mainly in the serosa and subserosa, where they give rise to polypoid or branched growths.
Spleen.—Enlarged, at first due to toxin (?) and later due to portal stasis. Eggs in the spleen are uncommon.
Ascites also arises from the portal stasis, and is generally present in advanced cases.
Eggs may be found in many other situations: glands (numerous), mesentery, stomach, pancreas, kidney, etc. The bladder remains free.
Fig. 183.—Schistosoma japonicum: liver showing eggs in the intra- and interlobular connective tissue. × c. 80. (After Katsurada.)