The Inheritance of Resistance to Cecal Coccidiosis in the Domestic Fowl

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DURING the past two decades investigational work in the various fields of animal husbandry has greatly stimulated interest in the possibility of breeding animals resistant to various infectious diseases. Heritable differences in resistance and susceptibility to pathogenic organisms in animals have been shown to exist, and various investigators have succeeded in establishing genetically resistant and susceptible lines of animals. A comprehensive review of the literature on this subject was presented by Gowen (1948). In the domestic fowl genetic differences in resistance to various pathological conditions are generally accepted. Evidence of genetic resistance and susceptibility to specific diseases (avian diptheria—Frateur, 1924; S. pullorum—Roberts and Card, 1935 and DeVolt et al., 1941; S. gallinarum—Lambert, 1932, and Lambert and Knox, 1932; lymphomatosis—Asmundson and Biely, 1932, Jeffrey et al., 1942, Taylor et al., 1942, Hutt and Cole, 1947, Hutt and Cole, 1948 and others) may be found in the literature. Published experimental work …