Further Experiments Concerning the Production of Immunity from Hog Cholera Volume . 101-110

Further Experiments Concerning the Production of Immunity from Hog Cholera Volume . 101-110

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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. 1908 edition. Excerpt: ...hogs only 1 (1600) died from the treatment, and this hog received but 1 c. c. of serum. Of the 12 hogs which received the same disease-producing blood without any serum all died. In the pens with the hogs vaccinated by the serum-simultaneous method, 6 checks were used to determine the likelihood of the disease being transmitted by vaccinated hogs. None of these checks became sick, but of 4 checks placed in the pens with hogs injected with disease-producing blood only, all contracted disease. Of the 19 hogs which survived vaccination by the serum-simultaneous method, all were exposed to hog cholera in the quarantine pasture from six weeks to two and one-half months after vaccination. Only 1 died from this exposure (1604), and, as previously explained, we can not be quite certain that this death was really due to hog cholera.. Six pen checks, which had remained well during exposure to the vaccinated hogs, were exposed in the pasture with the vaccinated animals, and as a result 5 died of hog cholera. Only 2 hogs were vaccinated with serum alone. These were first exposed to disease seventeen days after vaccination and remained well. Later exposure to disease in the Scribner and Syphax exposure pens did not produce sickness in these hogs. From the results of the experiments with serum from hog 1383 we may draw the following conclusions: 1. Serum from hog 1383, when given in sufficient dose, protects nonimmunes from an otherwise fatal dose of disease-producing blood administered simultaneously with the serum. 2. The serum alone in doses of 10 c. c. protects from infection occurring within 17 days after the administration of the serum. 3. Immunity conferred by the serum-simultaneous method lasts for two and one-half months at least. 4. Hogs treated by...show more

Product details

  • Paperback | 34 pages
  • 189 x 246 x 2mm | 82g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236624017
  • 9781236624017