Animal Breeding Heredity of Diseases
Animal Breeding Heredity of Diseases That certain forms of diseases are transmissible does not for one moment admit of question. That all forms of disease are transmissible is not true.
It is equally certain that in many instances disease may be present, or the predisposing influences that lead thereto, in a form so subtle as to escape notice, and that when thus present it may be transmitted directly, or the tendency to it only may be transmitted, requiring only certain conditions to develop into the active form.