This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1919. Not illustrated. Excerpt: ... the shell has a double contour; the contents are granular, grayish in color and on careful observation will be seen to be composed of a varying number of segments; in material that has stood for twentyfour to forty-eight hours motile embryos may be seen within the shell. (d) The ova of Trichocephalus trichiurus are elliptical in shape, brown in color and provided with a double-contoured shell, with a depression at each end, which is closed by a little knob-like lid. The contents are coarsely granular and contain a single cell at the time that the eggs are passed with the feces. Answer the Following Questions in Writing.--Name the class and order to which each one of the parasitic worms belong whose ova you have just studied. How does infection with each occur in man? Name the habitat of each in man. What is the most constant feature of the blood picture in the intestinal helminthiases? Where and under what pathological conditions may Charcot-Leyden crystals be encountered aside from the helminthiases? What is meant by a miracidium? What are cercarise? What symptoms on the part of the patient would lead you to examine the stool for intestinal parasites or their ova? Reading.-- Lesson 35.--Material Required.--1. Furnish every group of six to eight students with as many gross specimens of the following adult parasites as may.be available: (a) Ascaris lumbricoides--male and female; (6) Necator americanus--male and female; (c) Trichocephalus trichiurus--male and female; (d) Oxyuris vermicularis-- male and female; (e) Trichinella spiralis--male and female; (J) Strongyloides intestinalis--female. 2. Furnish also (a) preserved tissue specimens--taken from a dog showing hookworms attached to the intestinal mucosa; (b) meat infected with trichinella--trichinous rats; (c) ...
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