Figure. Individual sampling sites where macaques were tested for infection with Treponema spp. during 1999–2012 and the number of human yaws cases during 2001–2011, Sulawesi, Indonesia. Numbers in parentheses indicate number nonhuman primates sampled in each of the 6 provinces. ESPLINE TP (Fujirebio Inc., Tokyo, Japan) reagent for the detection of T. pallidum antibodies was used to determine whether macaque samples were positive for treponemal infection. The number of human yaws cases was determined by the World Health Organization (1). Inset map shows the location of Sulawesi in Indonesia (gray shading). NA, not available.