A 55 year old male recovering from surgery for a bowel obstruction had redness, swelling, pain, and tenderness at the surgical incision site. The patient had been recovering well up to that time from the surgery, which was performed four days earlier. A low-grade fever was noted and both aerobic and anaerobic cultures were performed from the incision. Several hours later the patients condition worsened as the fever increased and shaking chills occurred. Blood cultures were collected.Results revealed the presence of moderate (3+) gram positive cocci and gram-negative bacilli in the gram stain from the incision culture taken earlier in the day. A high white blood count was noted (indicating an infection). The aerobic blood culture bottle was gram stained after 8 hours incubation revealing gram positive cocci. This aerobic bottle was subcultured to sheep blood agar, and chocolate agar and incubated in increased CO2 at 35C. At 18 hours incubation, growth of gray, nonhemolytic colonies grew on both media. Catalase testing of these colonies was negative which of the following tests are most identify this isolate