1979 Volume 41 Issue 4 Pages 385-390
The present work was undertaken to observe the presence of auto-cold hemagglutinin in the plasma of chickens infected with Leucocytozoon caulleryi, and elucidate the immunological characteristics of this hemagglutinin. As a result, auto-cold hemagglutinin was found in all chickens infected with L. caulleryi. Pattern of the production and disappearance of this hemagglutinin was classified into two types, e.g., one peak type and two peaks type. It was noticed that the period of appearance of the highest titer of cold hemagglutinin coincided with that of anemia of chickens. Immunological characteristics of cold hemagglutinin was examined by the direct antiglobulin, the agar gel precipitation, and the absorption tests. The results of these tests suggested that the cold hemagglutinin in chickens infected with L. caulleryi was more likely, autoantibody rather than a parasite product, unlike the study by Kocan on Leucocytozoon simondi.
