. Animal parasites and human disease. Insect Vectors; Parasites; Parasitic Diseases; Medical parasitology; Insects as carriers of disease. RHINOSPORIDnjM 173. Sporocyst Sporozo'de 50). Little is known of the symptoms produced by these para- sites, but since they live inside epithelial cells of the intestine or liver they must be injurious. Wenyon has recently reported dysenteric symptoms in a case in which no intestinal parasites except Isospora were present. Coccidians are un- ff Him \"~ doubtedly spread by means of water or food polluted by mud and dirt, by unsanitary habits, and by fli
. Animal parasites and human disease. Insect Vectors; Parasites; Parasitic Diseases; Medical parasitology; Insects as carriers of disease. RHINOSPORIDnjM 173. Sporocyst Sporozo'de 50). Little is known of the symptoms produced by these para- sites, but since they live inside epithelial cells of the intestine or liver they must be injurious. Wenyon has recently reported dysenteric symptoms in a case in which no intestinal parasites except Isospora were present. Coccidians are un- ff Him \"~ doubtedly spread by means of water or food polluted by mud and dirt, by unsanitary habits, and by flies. Rhinosporidium9 a Parasite of the Nose In natives of India there is occasion- FlG> 50 oocyst of Eimeria ally observed a peculiar infection of the containing four sporocysts, each i_-t_ jx .aij -xt. with two sporozoites. nose in which a red tumor, flecked with whitish spots, and likened by some authors to a raspberry, grows out from the partition or septum of the nose, remaining attached by a narrow stalk. The tumors are not very painful, but they tend to block the nasal passages. It has been suggested that this disease, known as nasal polypus, may have the same in- fluence on the intellect of children that other impediments of the nose and throat are known to have. When the tumor is cut the white spots visible on the surface are seen to be scattered throughout the tissue and to be of very variable size. Microscopic examination shows them to be the cysts of a protozoan parasite in various stages of development. The parasite has been named Rhinosporidium kinealyi, and is classified as a member of the group of Sporozoa known as Hap- losporidia. The cysts in the tumor are filled with great numbers of spherical or oval bodies, the pansporoblasts, each of these in turn contain- ing from one to a dozen closely-packed spores (see small portion of a cyst in Fig. 51). The manner of development of the cysts and of the tumor can readily be discovered from the various stages of devel
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