A patient presents with a simple cellulitis of the right low…

A patient presents with a simple cellulitis of the right lower extremity.  The patient reports mild pain at the site and there is noted to be a small area of erythema and swelling around the site.  The patient is immunosuppressed and is therefore admitted to the hospital for IV antibiotic therapy.  Which of the following lab results does the nurse know will ultimately help the provider to de-escalate/tailor antibiotic therapy for this patient?