Annual Report of the Bureau of Animal Industry for the Year - U.S. Department of Agriculture

Annual Report of the Bureau of Animal Industry for the Year - U.S. Department of Agriculture

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 edition. Excerpt: all bodies of a preparation from one case, but could not be noticed in any preparation of perhaps the next case. These bodies stain as well as the larger pyriform bodies in basic aniline dyes and in haematoxylin. They do not stain in acid dyes, such as eosin or in Ehrlich's dye for neutrophile granules. When this stain is employed the corpuscles, beautifully tinted, show a small round unstained spot where the parasite is situated. When the dried lilms are treated with dilute acetic acid the corpuscles fade out, while these coccus-like bodies remain behind and stand out prominently. It has already been stated that these bodies are characteristic of the mild, autumnal type of the disease. A glance at the appendix will show how numerous these cases may be. This stage of the parasite is there indicated provisionally as "peripheral bodies" or "peripheral coccus-like bodies." A mere careful examination of these cases will reveal three groups: (1) Animals exposed to Texas fever late in the season (October and November). (2) Animals which, have passed through an acute attack earlier in the summer (second attack or relapse in October and November). (3) Animals which contract a mild disease during or previous to the season of the acute disease. In the first group the disease is mild and may pass unnoticed. The corpuscles with peripheral bodies appear in the blood as the number of corpuscles begins to fall, and disappear when it again begins to rise. Earely a corpuscle with a pair of large pyriform bodies is detected. In the second group the phenomena are the same. To the third group belong a few cases which showed a blood infection several weeks before the fever appeared among all the susceptible animals in the infected field. In two cases the more

Product details

  • Paperback | 252 pages
  • 189 x 246 x 13mm | 458g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236660633
  • 9781236660633