Our purpose in this report is to describe a microscopic slide precipitation test for syphilis with Kahn's antigen which is as sensitive as the routine three tube Kahn test with the following advantages over that method: 1. It is simpler. 2. It requires less apparatus and much less serum. 3. The results are easier to read.
Since the publication of the first precipitation test for syphilis by Michaelis,1 in 1907, numerous modifications of antigen and technic have been suggested, especially by Porges and Meier,2 Bruck and Hidaka,3 Herman and Perutz,4 Meinicke,5 Sachs and Georgi,6 Dreyer and Ward,7 Vernes8 and Kahn.9 Of these, the Kahn test has apparently received the widest acceptance, giving results, in the hands of numerous workers, in close agreement with the Wassermann test and with the clinical findings.
In commencing work with the Kahn test in this laboratory,
KLINE BS, YOUNG AM. A MICROSCOPIC SLIDE PRECIPITATION TEST FOR SYPHILIS: PRELIMINARY REPORT. JAMA. 1926;86(13):928–931. doi:10.1001/jama.1926.02670390008003
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