JOHANNESBURG — A student in Anthropology remains in critical condition after being bitten by a chimpanzee. Andrew F. Oberle, who had been in critical condition since Thursday's attack, was stable enough Sunday for doctors to bring him into the operating room to clean and stitch his multiple bites and attend to fractures and other injuries. Two chimpanzees at the Jane Goodall Institute Chimpanzee Eden in eastern South Africa pulled Oberle under a fence into their enclosure. Oberle was on his second study visit to the sanctuary for abused and orphaned chimpanzees.