In matters of health and disease, all living things have intimate relations. The factors that increase resistance to disease in plants can scarcely fail to interest physicians. Probably at least suggestive if not directly valuable hints for the prevention or inhibition of the contagious infections in human beings can be derived from a knowledge of the natural processes by which plant resistive vitality is encouraged. There is, too, a definite assurance that certain serious human diseases—tetanus and the gas-producing bacillary infections—are caused by micro-organisms fostered by plant life, and more than a suspicion that further study may reveal other similar relations.
Dr. Otto Appel1 has considered the analogies between plant and human diseases, and the problem of resistance. The question of alternation of hosts for certain diseases is a plant as well as a human pathologic feature. The tapeworms and echinococci require an intermediate animal host, and prevention is
DISEASE RESISTANCE IN PLANTS. JAMA. 1915;LXIV(26):2141–2142. doi:10.1001/jama.1915.02570520035013
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