Diseases of metabolism and of Diseases of metabolism and of the blood, animal parasites, toxicology diseasesofmetabo00cabo Year: 1906 Fig. 30.—Balantidium Minutum. Fig. 31.—Nyctotherus Faba. n, nucleus; cv, contractile vacuole. (After , micro nucleus; , macronucleus. Schaudinn.) (After Schaudinn.) which follow. Vorticelli, which, according to Lindner, are said to infest man, cannot yet be recognized as parasitic structures. This embraces the principal protozoa which occur in man. We now come to the more highly-organized class, the plathelminthes or flat-worms. To this group, which em
Diseases of metabolism and of Diseases of metabolism and of the blood, animal parasites, toxicology diseasesofmetabo00cabo Year: 1906 Fig. 30.—Balantidium Minutum. Fig. 31.—Nyctotherus Faba. n, nucleus; cv, contractile vacuole. (After , micro nucleus; , macronucleus. Schaudinn.) (After Schaudinn.) which follow. Vorticelli, which, according to Lindner, are said to infest man, cannot yet be recognized as parasitic structures. This embraces the principal protozoa which occur in man. We now come to the more highly-organized class, the plathelminthes or flat-worms. To this group, which embraces the two classes of trematodes, or sucking-worms, and cestodes, or tape-worms, belong the ' vermes intestinalis ' of the earlier authors or ' helminthes ' which—sit venia verbo—represent the true intestinal worms. TREMATODES The tongue- or leaf-shaped trematodes include the amphistomum hominis, Lewis and McConnell, 1876. I wish to include this parasite for the sake of completeness. Observed but a few times in the tropics, it possesses no actual interest for us, especially since its significance as a parasite is by no means accurately determined. Of greater importance is the distomum hepaticum, Linne, 1758. The liver-fluke is found in the intestines and in the bile-ducts of a great number of mammals, especially in the sheep. Eot or liver disease in many districts creates great ravages among sheep. The parasite is also often noted to occur sporadically. Its body is oblong, flat, leaf-like, with a proboscidiform projection on the cone-shaped head. One of the two suctorial discs is situ- ated at the point of the cone-like head, and contains the opening of the mouth. The other suctorial disc belongs to the abdominal surface. The oval eggs are
Size: 1462px × 1368px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
