natural hemolysin

nat·u·ral he·mol·y·sin

hemolysin occurring in the plasma of an animal of one species, (for example, a dog), which fixes complement with the red blood cells of some other species, (for example, a rabbit), thereby causing hemolysis of the cells of the rabbit, although the dog was not previously exposed to antigenic stimulation with such cells.
Farlex Partner Medical Dictionary © Farlex 2012
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