. Diseases of swine. Swine. PARASITIC DISEASES I7I is cylindrical, with the greatest diameter toward the anterior part. At the anterior extremity is a re- tractile proboscis armed with six rows of hooks, by means of which it attaches itself to the intestinal wall. The average length of the female is about eleven inches; that of the male, from two and a half to three inches. The eggs average about one two-hundred-and-. FIO. 21—MALE THORN-HEADED WORM ATTACHED TO WALL OF INTESTINE fiftieth of an inch in length, and are smooth and somewhat cylindrical in shape. Source of Infection.—The development
. Diseases of swine. Swine. PARASITIC DISEASES I7I is cylindrical, with the greatest diameter toward the anterior part. At the anterior extremity is a re- tractile proboscis armed with six rows of hooks, by means of which it attaches itself to the intestinal wall. The average length of the female is about eleven inches; that of the male, from two and a half to three inches. The eggs average about one two-hundred-and-. FIO. 21—MALE THORN-HEADED WORM ATTACHED TO WALL OF INTESTINE fiftieth of an inch in length, and are smooth and somewhat cylindrical in shape. Source of Infection.—The development of the thorn-headed worm requires an intermediate host, the larvae of the May beetle, or some other in- vertebrate form, in which they encyst. The female deposits her eggs in the hog's intestines, and they pass out along with the excrement. In this way. 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 Craig, Robert A[lexander] 1872- [from old catalog]. New York, O. Judd company
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
