Report Volume 26

Report Volume 26

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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. 1911 edition. Excerpt: ...planted upon suitable soil; that it will sprout and grow, producing the plant and later the seed, thus providing a perpetual source of infection for the stock that may chance to be allowed to linger on this area of growing anthrax plants. Because of the remarkable tenacity with which certain plats of ground retained their infection, Pasteur in 1880 reached the conclusion that the carcasses of animals dying from anthrax, even though deeply buried, retained their many infectious organisms and supplied them with such an amount of nutriment that they continued to multiply for years, and in this way produced an immense underground supply of virulent anthrax organisms. He decided further that these living infectious germs might be brought to the surface at any time through the agency of earthworms, and that, having reached the surface, they offered a very serious menace to any live stock that might wander into that vicinity. These suggestions were very generally accepted by the medical fraternity and for some years were taught as illustrative of the manner in which anthrax lurks in certain localities for years at a time; but later investigations by Kitasato have shown that spore formation by anthrax bacilli is very incomplete at a depth of 18 to 20 inches below the surface of the ground, and at even greater depths must be greatly suppressed by the presence of the products of decomposition. Koch has further stated that earthworms are incapable of taking up anthrax spores and bringing them to the surface. Nevertheless, the fact remains that certain circumscribed areas of ground remain dangerous to stock from year to year. It is still an unsettled question whether the anthrax germs grow and multiply each season upon infected lands when more

Product details

  • Paperback | 170 pages
  • 189 x 246 x 9mm | 313g
  • United States
  • English
  • black & white illustrations
  • 1236766539
  • 9781236766533