Sherzad abdullahalmost 6 years ago

A 65-year-old woman undergoes an abdominal hysterectomy. She develops pain and discharge at the incision site on the fourth postoperative day. The past medical history is significant for diabetes of 12 years duration, which is well-controlled on insulin. Pus from the incision site is sent for culture on MacConkey agar, which shows white-colorless colonies. On blood agar, the colonies were green. Biochemical tests reveal an oxidase-positive organism. Which of the following is the most likely pathogen? A. Staphylococcus aureus B. Staphylococcus epidermidis C. Enterococcus faecalis D. Streptococcus pyogenes E. Pseudomonas aeruginosa