. Biology in America. Biology. Bwlogij (iiul Medicine 4fi3 and spread of tlio disease. There is no remedy known, save that of prevention, and it is here, in the safeo;nardinfr of onr meat supply tliat the proteeting liaiid of Uncle Ham is stretched forth to save both tlie lives and the dollars of his children. Other parasitic worms of occasional occurrence in tlie United States but of minor importance from a medical stand- point, because of their relative benignity, are the tapeworms transmitted to men in the flesh of both hogs and cattle. The stoiy of the tapeworm brietiy told is as follows:
. Biology in America. Biology. Bwlogij (iiul Medicine 4fi3 and spread of tlio disease. There is no remedy known, save that of prevention, and it is here, in the safeo;nardinfr of onr meat supply tliat the proteeting liaiid of Uncle Ham is stretched forth to save both tlie lives and the dollars of his children. Other parasitic worms of occasional occurrence in tlie United States but of minor importance from a medical stand- point, because of their relative benignity, are the tapeworms transmitted to men in the flesh of both hogs and cattle. The stoiy of the tapeworm brietiy told is as follows: This is as its name implies, a tape or band-like animal, divided into segments which become progressively larger and riper in. A Tape Worm op Man Courtesy of the U. S. Bureau of Animal Industry. passing from the "anterior" or "head" end posteriorly. The beef tapeworm lives in the intestine of man, and its ripe proglottids are passed in the stools of the patient. Tiiese east proglottids are virtually nothing but a sack full of embryos, each surrounded by a horny sliell. If one of these embryos is taken by the beef in its food or water, it loses its shell in the beef's stomach and passes into the intestine as a tiny em- bryo about 1/80 of an inch in diameter. This is armeil with three paired hooks by means of which the larva rapidly works its way through the intestinal wall and into the blood vessels, through which it is carried to the muscles or "flesh" of the animal where it grows to a considerable size, acquiring the "head" or attachment organ of the adult worm. The larva. 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 Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger
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