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. 2014 May 22;8(5):e2904. doi: 10.1371/journal.pntd.0002904

Figure 2. Age distribution of BU incidence and anti-18 kDa shsp IgG serum titres among healthy inhabitants of Mbandji 2.

Figure 2

A Incidence of reported BU by age in the Bankim Health District (March 2010 – May 2013). B Boxplot of OD values of 1∶100 diluted serum samples from inhabitants of Mbandji 2 tested in an anti-M. ulcerans 18 kDa shsp IgG specific ELISA by age group. No IgG titres above the background level were observed for children below the age of four. The background response (OD<0.35) is indicated as a dotted line.