Proceedings, Annual Meeting of the United States Livestock Sanitary Association Volume 23

Proceedings, Annual Meeting of the United States Livestock Sanitary Association Volume 23

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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. 1920 edition. Excerpt: ... in this country. When he exam iined a considerable number of aborts, and in some failed to obtain B. abortus but did recognize a vibrio probably identical with that of McFadyean and Stockman, he was quite entitled to believe that as between the B. abortus and the vibrio, the latter was the logical cause of the abortion. But Smith observed the presence of colon and other organisms also in these aborts and gave no extended study to their possible pathogenic relation. So with Moussu who avers that in large areas in France where abortion is very destructive, the B. abortus is absent and the abortion is due to a colon bacillus. Moussu's statement draws notable support from the accepted views regarding dysentery of calves, in which it is quite commonly believed that the disease is due primarily to the colon bacillus. The researches of Hagen and Carpenter in, or in collaboration with, my department have clearly established the fact that dysentery or calf scours-is fundamentally an intrauterine infection. It is further established beyond doubt that aborts frequently, if not generally, suffer from diarrhea not long prior to death. Calves are occasionally born with dysentery of a very pronounced type. The colon bacillus is apparently the dominant factor in calf dysentery and according to our limited researches is also the dominant infection in preenatal diarrhea. There are good reasons for believing that embryonic diarrhea is an important factor in embryonic death and hence in abortion. There is no reason known why a bacillus capable of causing dysentery in a calf should not also be able to-cause diarrhea in an embryo and vice versa. One of the most misleading views, if such view actually exists, is that birth constitutes a line more

Product details

  • Paperback | 130 pages
  • 189 x 246 x 7mm | 245g
  • United States
  • English
  • black & white illustrations
  • 1236887964
  • 9781236887962