It is a generally accepted fact that bacillary white diarrhea is one of the most prevalent, and one of the most fatal, diseases of young chicks. In consequence, the attention of many investigators has been directed toward the development of methods for its eradication or control. One of the possible means of reducing losses from this disease is the establishment of immune or resistant stocks, for it is a matter of common observation that individuals vary greatly in their resistance to a given disease. The production of resistant stocks is possible only if resistance to disease is hereditary. So far as the authors are aware, it has not yet been demonstrated that resistance to a bacterial disease is hereditary, although Frateur (1924) has reported that resistance to infection by the bacillus of avian diphtheria is a simple Mendelian dominant. The term “resistance” is used here, rather than “immunity,” for the . . .
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Roberts et al. (1926) studied this question.