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SEROLOGIC STUDIES:  II. A CLINICAL COMPARISON OF THE KOLMER COMPLEMENT FIXATION AND THE KAHN PRECIPITATION TESTS IN SYPHILITIC AND NONSYPHILITIC CASES

MARY C. McINTYRE, M.D.; ROBERT L. GILMAN, M.D.
JAMA. 1929;93(5):358-360. doi:10.1001/jama.1929.02710050012004.
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In a previous communication we1 compared the Kolmer modification of the Wassermann test and the Kahn precipitation test with the clinical observations in syphilitic and nonsyphilitic cases. The present study is a continuation of serologic and clinical comparisons. Differentiation of serologic response in treated and untreated cases is not made except in a small group of early untreated cases of syphilis.

Heretofore we have used an arbitrary reading of 244 or above in the Kahn test and 33000 or above in the Kolmer test as a positive result. This is still our basis of comparison in the tables given, but we have also given the agreement on a basis of a positive reading of 001 Kahn and 10000 Kolmer or higher. This appears advisable because of the stress laid on even weakly positive reactions by both Kolmer and Kahn. Inclusion of the latter basis of comparison has a tendency

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