Veterinary Practitioners' Bulletin Volume 5-9

Veterinary Practitioners' Bulletin Volume 5-9

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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. 1922 edition. Excerpt: ... caseation to smaller foci of same on a hemorrhagic or markedly congested mucosa. The thickness of the wall was frequently increased two or three times its normal as the result of diptheritic membrane formation, edema, congestion, leucocytic infiltration and in a few instances early connective tissue reactions. In a number of experimental and in a few field cases it was observed that when pigs were destroyed shortly after the onset of diarrhea there appeared in the middle portions of the large colon, in some instances the cecum, discs or plates of somewhat firm intestinal contents 1/2 to 1% c.m. in diameter and several or more m.m. thick somewhat firmly adherent to the mucosa. These were held to the mucosa by means of a turbid muco-fibrinous exudate, in some instances leaving a shallow depression after being pulled ofl: '. In the underlying crypts dense, nearly solid masses of a necrophorus-like organism in chains were found upon microscopic examination of histological preparations (Fig. 21). Many times the epithelium in such crypts showed advanced changes. Trichuris suis and Ascaris lumbricoides were present in some, but absent in most subjects. Micro: The general process was like that described in the cecum characterized by the following zones of lesions (Fig. 22): A. Heavy caseated membrane (Fig. 23), varying in thickness up to 3 m.m., absence of cell outlines. B. The above process merged into a zone of karyorrhexis (Fig. 24), which varied in intensity in different subjects. The karyorrhectic zone frequently extended far into the submucosa, and in quite a number of cases involved the inner circular muscle (Fig. 27). C. Under the karyorrhectic zone appeared a variable dense zone of leucocytosis (Fig. 25). In some cases this process...show more

Product details

  • Paperback | 118 pages
  • 189 x 246 x 6mm | 227g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236884205
  • 9781236884206