 Study Population To accomplish the study objective, a prospective, open-label, pharmacokinetic study of ertapenem in 8 patients on CAPD will be conducted. The desired composition of the study population will consist of approximately 4 males and 4 females, 6 of whom will be Caucasian, and 2 non-Caucasian patients. This patient composition was selected because it reflects the demographic at the Hortense and Louis Rubin Dialysis Center, Clifton Park, NY. 