FIG. 1.

Geographic origin of SIVcpz-infected chimpanzees. The rescue location of CAM13 is shown in relation to the geographic origin of four previously reported SIVcpz-infected chimpanzees from southern Cameroon (CAM3 and CAM5) and northern Gabon (GAB1 and GAB2) (4, 19). Red dots indicate known capture locations (CAM3 and GAB2), while yellow dots indicate sites where chimpanzees were first identified in captivity (CAM13, CAM5, and GAB1). The natural ranges of the P. t. troglodytes and P. t. vellerosus subspecies are highlighted in light green (south of the Sanaga River) and dark green (north of the Sanaga River), respectively (major rivers are indicated).