. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. Fig. 65. Eggs of Schistoma; A, terminal spined egg of S. hosmatobium from urine; B, lateral spined egg of S. mansoni from faeces; C, egg of S. japonicum, with only rudiment of spine; note developed embryos in all. X about 200. (A and B after Looss, C after Leiper.) parts of Africa, especially the east coast. In Egypt over half the population are said to be infected, and in an examination of 54 boys in the village of El Marg, near Cairo, 49 were found infected. These flukes, about one-half inch in length
. Animal parasites and human disease. Medical parasitology; Insects as carriers of disease. Fig. 65. Eggs of Schistoma; A, terminal spined egg of S. hosmatobium from urine; B, lateral spined egg of S. mansoni from faeces; C, egg of S. japonicum, with only rudiment of spine; note developed embryos in all. X about 200. (A and B after Looss, C after Leiper.) parts of Africa, especially the east coast. In Egypt over half the population are said to be infected, and in an examination of 54 boys in the village of El Marg, near Cairo, 49 were found infected. These flukes, about one-half inch in length, abound sometimes in hundreds in the abdominal veins of their host, living espe- cially in the portal vein and its various branches. The eggs of the worms, which are oval with a stout spine at one end (Fig. 65A), and about mm. {j^js of an inch) long, are carried to the small vessels on the surface of the urinary bladder. By means of the sharp spine they penetrate to the wall of the bladder and are voided with the urine. As the eggs enter the bladder they cause a certain amount of bleeding, resulting in a bloody Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chandler, Asa Crawford, 1891-. New York, J. Wiley
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