RPR and VDRL tests are two different nontreponemal tests that diagnose syphilis. Nontreponemal tests do not detect antibodies specific to syphilis. They are based on the reactivity of serum from infected patients to a cardiolipin-cholesterol-lecithin antigen called reagin. The key difference between RPR and VDRL test is their sensitivity. RPR is more sensitive than VDRL. […]
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