Regarding syphilis, which one of the following is most accurate?
A. The characteristic lesion of primary syphilis is a painful vesicle on the genitals
B. In secondary syphilis, the number of organisms is low, so the chance of transmitting the disease to others is low
C. In secondary syphilis, both the rapid plasma reagin (RPR) and the fluorescent treponemal antibody-absorbed (FTA-ABS) tests are usually positive
D. The antibody titer in the FTA-ABS test typically declines when the patient has been treated adequately
E. In congenital syphilis, no antibody is formed against T. pallidum because the fetus is tolerant to the organism
Ans: C. In secondary syphilis, both the rapid plasma reagin (RPR) and the fluorescent treponemal antibody-absorbed (FTA-ABS) tests are usually positive
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