Studies from the Department of Pathology of the College of Physicians and Surgeons, Columbia University, N.Y. . Reprints (Volume 10) - Softcover

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. 1905. Excerpt: ... When the ascarids were put into a very weak saline solution, they at once became violently contorted and gave out into the fluid countless eggs, through the thin shells of which the embryos could be seen twisting and turning. A still better view of the embryos was had by putting them in glycerine, when the shell previously cloudy though translucent, cleared. The heart was sometimes pale, but oftener appeared to be the healthiest organ in the animal. The stomach was uniformly distended with viscid, ropy mucus, and was markedly congested. The intestines were normal except for congestion which was frequently noted, and occasional prolapse of the anal end of the gut. The spleen and liver were soft and mottled. Specimens taken from the lymph spaces and abdominal cavity of three or four gave uniformly pure cultures. Essentially the same lesions were found, though in varying degrees of severity in frogs (R. viridis) previously healthy and coming from New Rochelle, N. Y., and (R. tigrina) Chicago, 111., infected by living in the same tanks with the diseased frogs. The larger frogs succumbed much less readily than the small ones, and the large and vigorous R. tigrina from Chicago proved much more resistant than other varieties under the same conditions, and showed no deaths within a month after their receipt. In November we secured a lot of healthy R. esculenta and R. tigrina from Ithaca, N. Y., and of these none developed the disease except on inoculation. During October, November, and December, 1903, our frogs were received as follows: October--300 from Philadelphia, of which 200 died of the disease. 70 were used before death, and 30 lived without showing any lesions. These consisted chiefly of R. esculenta, among which were a few of the species R. viridis. Nove...