Management of Leukocytosis with a Wound and No Other Complaints

Initial Assessment and Diagnosis

The presence of leukocytosis (WBC ≥14,000 cells/mm³) and a wound requires immediate assessment for bacterial infection, as this combination carries a high probability of underlying infection, according to the Infectious Diseases Society of America 1, 2
Determine if the wound is clinically infected by examining for purulent secretions or at least 2 cardinal signs of inflammation: redness, warmth, swelling/induration, and pain/tenderness, as recommended by the Infectious Diseases Society of America 3, 4
Leukocytosis ≥14,000 cells/mm³ has a likelihood ratio of 3.7 for bacterial infection, and this probability increases substantially with left shift (≥6% bands has likelihood ratio of 4.7, absolute band count ≥1,500 cells/mm³ has likelihood ratio of 14.5), based on evidence from the Infectious Diseases Society of America 1, 2
Leukocytosis is associated with increased mortality in infected patients, particularly with pneumonia (WBC ≥15,000) and bloodstream infections (WBC ≥20,000), according to the Infectious Diseases Society of America 1, 2

Debride the wound thoroughly to remove all nonviable tissue, as this is essential for both diagnosis and treatment, recommended by the Infectious Diseases Society of America 3, 4, 5
Probe the wound with a sterile blunt metal probe to assess depth, detect bone involvement, identify foreign bodies, abscesses, or communication with deeper structures, as recommended by the Infectious Diseases Society of America 3, 4
Obtain tissue specimens for culture from the debrided wound base via curettage or biopsy, which is the gold standard, according to the Infectious Diseases Society of America 3, 4, 5, 6
For mild infections, oral antibiotics targeting aerobic gram-positive cocci (dicloxacillin, cephalexin, or clindamycin) for 1-2 weeks, as recommended by the Infectious Diseases Society of America 7, 6
For moderate-to-severe infections, parenteral broad-spectrum antibiotics covering gram-positive cocci, gram-negative rods, and anaerobes, recommended by the Infectious Diseases Society of America 7, 6

Do NOT treat clinically uninfected wounds with antibiotics despite leukocytosis, as this promotes resistance without benefit, according to the Infectious Diseases Society of America 8, 5, 6
Do NOT obtain swab cultures from undebrided wounds, as these yield misleading contaminated results, recommended by the Infectious Diseases Society of America 5, 6
Do NOT use narrow-spectrum antibiotics for moderate-severe infections until cultures guide de-escalation, as recommended by the Infectious Diseases Society of America 7
Do NOT assume absence of fever excludes serious infection, as half of severe infections lack systemic signs, according to the Infectious Diseases Society of America 5, 7