. Animal parasites and human disease. Insects as carriers of disease; Medical parasitology. 174: OTHER SPOROZOA plasm at the periphery of the animal continues to grow, constantly becomino; differentiated into new pansporoblasts. The young pansporoblasts (Fig. 51, yg. pansp.), at first simple masses of protoplasm, soon form within themselves one, two, four, and ultimately as many as 12 spores, tightly clumped together so as to resemble little mul- -V' :ri£=^^^::^;^^!^=^^^^ berries (Fig. 51, mat. pansp.). From the mode. c^—' ^^Mm^ of development of the '^0^^'^MB cysts it is clear that th
. Animal parasites and human disease. Insects as carriers of disease; Medical parasitology. 174: OTHER SPOROZOA plasm at the periphery of the animal continues to grow, constantly becomino; differentiated into new pansporoblasts. The young pansporoblasts (Fig. 51, yg. pansp.), at first simple masses of protoplasm, soon form within themselves one, two, four, and ultimately as many as 12 spores, tightly clumped together so as to resemble little mul- -V' :ri£=^^^::^;^^!^=^^^^ berries (Fig. 51, mat. pansp.). From the mode. c^—' ^^Mm^ of development of the '^0^^'^MB cysts it is clear that the ^^i§,?©S^®®- older pansporoblasts are ..^ ^-r,\ ^^>, the ones near the center of the cyst, the younger ones those toward the mat pansp. l^^/^^f^ periphery. When the ^ - ' • ? ' cysts have reached a certain size the growth of the periphery ceases, ' '• all the pansporoblasts ma- FiG. 51. Portion of fully developed cyst of , 1,1 , , Rhinosporidium; c. w., cyst wall; yR. pansp., fUl'G anci tne CySl TUpmreS, young pansporoblasts; mat. pansp., fully de- liberating the SporCS intO veloped pansporoblasts containing spores, sp. ,1 v ,• X about 100. (After Fautham and Porter.) ^'^^ SUrrouncimg tlSSUe, each to develop into a new cyst. How the parasites are transmitted to new hosts is not known, A similar disease was found some years ago in South America and a parasite, then named Coccidiiim seeberi, has been described from the tumors. It is possible that this may be the same organism as that of Indian nasal polypus, but according to Fan- tham, who was one of the original describcrs of Rhinosporidium, there are a number of differences between them. Sarcosporidia, Parasites of the Muscles Brief mention should bo made of a group of Sporozoa known as the Sarcosporidia which develop relatively enormous cysts in the muscles of vertcljrate animals, especially in mannnals. These parasites arc usually found in the striped muscles but they also occur in other muscles. Infec'ed mu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmedical, bookyear1918
