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State the composition of the RPR antigen.

  1. State the composition of the RPR antigen.

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RPR antigen suspension. Stabilized combination of 0.003% cardiolipin, 0.020-0.022% lecithin, 0.09% cholesterol, 10% choline chloride, 0.0125M EDTA, 0.01875% charcoal, 0.01M Na2HP04, 0.01M KH2P04, 0.1% thimerosal in distilled water. The antigen suspension is packaged in ampules.Antigen used in RPR test contain cardiolipin lecithin,cholesterol, 10% choline chloride, EDTA, charcoal in buffer. This test cannot be performed on CSF . Serum or plasma can be used for testing, serum not heated. This test tends to give negative results during late syphilis.

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