Figure 3.

Interquartile ranges and medians of anti-PGL-I IgM, IgG, and IgA levels in serum samples from MB (multibacillary) contacts who were household (HH, N = 6), or MB peridomicilliary contacts (PD, N = 26), and MB leprosy index cases (N = 50). The cutoff values were 1.1 for IgA and 1.2 for IgG and IgM isotypes.

^ap<0.0001, Kruskal-Wallis test, anti-PGL-I IgM levels in MB index cases were higher than in PD contacts; ^bp<0.01, Kruskal-Wallis test, anti-PGL-I IgM levels in MB index cases were higher than in HH contacts; ^cp<0.0001, Kruskal-Wallis test, anti-PGL-I IgG levels in MB index cases were higher than in HH contacts; ^dp<0.01, Kruskal-Wallis test, anti-PGL-I IgG levels in MB index cases were higher than in PD contacts; ^ep<0.0001, Kruskal-Wallis test, anti-PGL-I IgA levels in MB index cases were higher than in HH and PD contacts.