|Contribution||Contributed to the development of a serological test for diphtheria.|
|Notes||Theodor Escherich, with Klemensiewicz, was one of the first to demonstrate antitoxin in serum of recovered diphtheria patients -- a finding that his pupil Schick later used in the development of the Schick intracutaneous test. For Friedmann reference, see Escherich 1885.|
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