Figure 2.
Histogram of MT IgG ELISA OD distribution. Vertical lines represent different OD cutoffs for determining seropositivity: Line A, mean OD (0.09); Line B, OD 0.25; Line C, mean OD plus 1 SD (0.22); Line D, mean OD plus 2 SD; Line E, mean OD plus 3 SD. MT = murine typhus; OD = optical density. This figure appears in color at www.ajtmh.org.