Memoir Volume 11

Memoir Volume 11

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...Human Trj)pan0s0me.--Plate I, fig. 1, represents this parasite as usually seen in the native. In stained preparations its length, including the flagellum, averages 20." Its width is 1-8, u to 2, u. The distance from micronucleus to the centre of the macronucleus is 5-9 u. The distance from the micronucleus to the tip of the posterior end of the body was found to vary, as a rule it measured 1-6;u, but parasites were often seen in which this distance was only 0-5, u-. This trypanosome, as seen in the native and quadroon cases, presented no features morphologically difl"erentiating it from the one described by one of us in 19OI, as occuring in the blood of a European and a native child in Gambia, and named T. gambieme. The Horse Trypanos0me.--The parasite seen in Senegambian horses was never encountered in any great numbers in the peripheral blood during the early stages of the infection. The blood of one horse, Case V, in which the disease proved fatal, never contained many parasites. Plate 1, fig. 6, represents the trypanosome as seen in the early stages of infection of the horse. The parasite is a very small organism, rather tadpole-shaped. Its /protoplasm stains deeply. Its posterior end is either sharply cut away or bluntly conical. The body tapers from the posterior end as a rule, and is prolonged anteriorly into a short fine flagellum. The micronucleus and vacuole are placed almost at the extreme posterior end of the parasite, the former is a small dark crimson staining spot generally situated to one side, the latter varies much in size in different specimens. The macronucleus is generally rounded, granular, and does not quite extend across the short axis of the body. The blue staining body-protoplasm of some more

Product details

  • Paperback | 36 pages
  • 189 x 246 x 2mm | 82g
  • United States
  • English
  • black & white illustrations
  • 1236942159
  • 9781236942159