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Encyclopedia Britannica - Main :: GRA-GUI |
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GROUP XXV I . Antitoxins.These are substances which antago- nize the toxins formed in the body
animal poisons, and vegetable toxins such as abrin, ricin, &c. A healthy person can be rendered insusceptible by gradually accustoming him to increasing doses of these poisons, and this immunity is due to antitoxins which are found in the blood-serum and which are products of the blood cells. The nature of these antitoxic substances is not definitely known, but they combine with and destroy the poisons. In specific germ diseases a similar antitoxin forms, and in cases which recover it counteracts the toxin, while the germs are destroyed by the tissues. Antitoxins can be prepared by immunizing a large animal , such as a horse
tissue . In due time the horse
anti
diphtheria , tetanus, streptococcic infections, plague, snake-poisoning, cholera and other similar diseases. They do not as a rule
body
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