Abstract
When properly treated a temporary immunity was secured against the organisms of surra of India, surra of Mauritius, caderas, dourine and nagana. The immunity was specific in the sense that it was active against the species cured but not against any other. The immunity varied with the virus, the medicament, the time at which the immunity tests were begun, the number of the tests, the intervals between them and the natural variations in the mice employed.
Against the parasites of surra of India, surra of Mauritius, caderas, nagana, and a toluidin blue resistant strain of nagana, an immunity was produced which was strong enough to prevent one or more subsequent inoculations of virus from infecting. The immunity to dourine was less strong.
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