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To the Editor:
—In The Journal, July 15, is a current comment in which the statement is made that, "contrary to the theory of 'desensitization' by internal administration of tincture of rhus, it appears that the susceptibility may be increased with successive intoxications."The question of desensitization by internal administration of the tincture of the drug is unrelated to the question of increasing susceptibility to successive external exposure to the plant. It is to be regretted that destructive criticism of the treatment by desensitization should be published without adequate clinical testimony, for many patients may, as a result, be deprived of the value of this treatment.In October, 1919, I published a short paper in The Journal on "Desensitization of Persons Against Ivy Poison." Since that time I have treated in the neighborhood of fifty patients who were susceptible to ivy poison, and most of whom were subject to yearly
Schamberg JF. "THE ALLEGED INSUSCEPTIBILITY TO INTOXICATION BY POISON IVY". JAMA. 1922;79(4):320. doi:10.1001/jama.1922.02640040066034
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