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A Rapid Precipitation Test for Syphilis.

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By Rosenthal L..  (Proc. of the Soc. f. Exper. Biol. and Med.. , October, 1929; , p. 61.).

Ann Intern Med. 1929;3(6):626-627. doi:10.7326/0003-4819-3-6-626_2
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This test unlike the other existing precipation tests for syphilis requires no dilution of the serum and antigen, either before or after mixing them. Therefore the tests deals with only two ingredients: serum and antigen. The serum is obtained and inactivated in the usual way. As only small amounts of serum are needed, it may be sufficient to secure the blood from the finger. The antigen is prepared by adding 2% solution of cholesterin in acetone to an equal volume of alcoholic beef heart extract, which is obtained by adding 5 cc. of 95% alcohol for every gram of beef


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