Gram Negative Spiral
A third-year medical student is on his first rotation in internal medicine. His attending physician points out that there are several tests that are used to diagnose syphilis. Which test is most specific for the detection of syphilis?
|A||Rapid plasmin reagin (RPR)|
|B|| Fluorescent treponemal antibody-absorption
|C||Venereal Disease Research Laboratory (VDRL)|
a. There are two classes of test used to detect the presence of an infection. The nontreponemal tests detect the presence of antibodies against lipids present on the organism. The nontreponemal tests include RPR and VDRL. Specific tests that detect antibodies against the organism itself, include MHA-TP and FTA-ABS.
b. The Ziehl-Neelsen stain is used to identify acid fast bacteria.