Host Resistance and Regulation of the Development of Plasmodium lophurae in Pheasants, Coots and Domestic Pigeons

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Abstract
P. lophurae was studied in various avian hosts. Details of the rates of reproduction, survival and destruction of this parasite developing in pheasants, coots and pigeons are summarized in 6 figures and 2 tables. In general, rates of survival, death and reproduction are regulated by the nature of the host. Reproduction was lowest in pigeons, highest in coots and intermediate in pheasants; innate immunity was highest in pheasants, intermediate in pigeons and lowest in coots. Increased frequency of schlzogony, high merozoite mean, and low innate immunity account for the lethal effects of this plasmodium in coots. Strong parasiticidal antibodies in pheasants and decreased frequency of schizogony in pigeons account for the fact that the infection in these 2 hosts usually ends in latency, while in coots it is almost always fatal.

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