. A text book of veterinary pathology, for students and practitioners. Veterinary pathology. 82 \'ETERINAR\- PATJIOLOGY. that it was transmitted to tlieir offspring; and was then a nat- ural immunity. The resistance possessed by dogs to most diseases is ex- plained in a similar way tu the Cubans' resistance to yellow fever. Thus the dog has descended from the jackal and the wolf, two types of animals that have lived largely upon the carcasses of animals dead of various diseases. As the animals fed (in carcasses they fought, thus inoculating each other, so in the beginniniT the least resistant
. A text book of veterinary pathology, for students and practitioners. Veterinary pathology. 82 \'ETERINAR\- PATJIOLOGY. that it was transmitted to tlieir offspring; and was then a nat- ural immunity. The resistance possessed by dogs to most diseases is ex- plained in a similar way tu the Cubans' resistance to yellow fever. Thus the dog has descended from the jackal and the wolf, two types of animals that have lived largely upon the carcasses of animals dead of various diseases. As the animals fed (in carcasses they fought, thus inoculating each other, so in the beginniniT the least resistant individuals died, the more resis-. Flg I'Horoptew C'oniiminis Ovis, 150 diameters. tant animals survived. Tims the constant fighting and inocu- lating has established in them a firm resistance that is trans- mitted to their progeny as a natural immunity. This immunity has become so fixed that it does not var_v even in the domestic dog. The above is a plausible explanation of race or species immunitx". Tlie exact origin of indi\-idual immunit-\' is considered l)y some to Ije an ac(|uired tolerance, i. e., an actpiired immunity, and 1)\- (itliers, as simjily an individual resistance not developed by liaving tlie disease to which the given individual is immune. Acquired immunity is an artficially produced condition bv virtue of which the animal is capable of resisting disease, and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kinsley, Albert Thomas, 1877-. Chicago, A. Eger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectveterin, bookyear1910
