During each week of treatment, blood (about 1 tablespoon) will be drawn for routine lab tests. The blood sample may be drawn from the CVC, if the CVC is still in place. In addition, blood (about 1 tablespoon) will be drawn every other day until it no longer shows signs of infection. The catheter exit site may be examined at each visit until you have no more signs or symptoms of infection. If you are discharged from the hospital before completing the study medication, arrangements will be made to provide infusions on an out-patient basis or home infusion.