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Further Experiments Concerning Immunologic Reciprocity Between Yaws and Syphilis.

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By SCHÖBL OTTO. . (The Philippine Journal of Science. , October, 1930; . p. 263.).

Ann Intern Med. 1930;4(4):406. doi:10.7326/0003-4819-4-4-406_1
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Additional experimental evidence showing that yaws infection immunizes Philippine monkeys against cutaneous inoculation with syphilis is given in this paper. Eleven Philippine monkeys that had gone through yaws infection and were proven to be immune to yaws were inoculated with syphilis by intradermal injection on the scrotum. Two normal control animals were included in the test for immunity to syphilis. The shortest interval of time between the first inoculation with yaws and the test for immunity to syphilis was twelve months, the longest twenty-one months. Following the inoculation with syphilis the places of inoculation were inspected regularly for a period



syphilis ; yaws ; immunology

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