Figure 1.

VDRL and Treponemal immunoblot. The test was deemed valid if the serum control band and the appropriate conjugate control band (IgM or IgG) were clearly visible. Each of five VDRL bands were assessed for intensity compared to the cutoff control and assigned a number of units. For the Treponema bands (p47, p44.5, p17, p15), band intensity less than the cutoff control band was considered a weak band; band intensity equal to or greater than the cutoff control band was considered a reactive band.