Antibiotic Prophylaxis for Wound Infections

Indications for Systemic Antibiotics

The Infectious Diseases Society of America recommends systemic antibiotic prophylaxis for high-risk bite wounds, including cat bites, human bites, deep puncture wounds, and wounds involving hands, face, or genitals, in immunocompromised patients 1, 2
Systemic antibiotic prophylaxis is also recommended for patients with systemic signs of infection, compromised immune status, severe comorbidities, or deep wounds 2
The World Journal of Emergency Surgery suggests that damaged skin, such as burns or pressure ulcers, with systemic signs, may also require systemic antibiotic prophylaxis 2

For animal bites, the American College of Physicians recommends amoxicillin-clavulanate 875/125 mg PO twice daily as the first-line choice for prophylaxis and treatment 1, 3
For human bites, the Infectious Diseases Society of America recommends amoxicillin-clavulanate or ampicillin-sulbactam at the same doses as animal bites 1, 3
For surgical prophylaxis in clean-contaminated procedures, the Clinical Infectious Diseases journal suggests cefoxitin 1 g IV every 6-8 hours or ceftriaxone 1 g IV plus metronidazole 500 mg IV for procedures involving the lower GI tract or genitourinary tract 1, 3

The Praxis Medical Insights guideline recommends that prophylactic antibiotics should be administered within 60 minutes before surgical incision or immediately after bite injury presentation, and duration should be ≤24 hours to 5-7 days maximum for established wound infections with adequate source control 3
Prolonged courses of antibiotics increase the risk of resistance without additional benefit 3, 4

The World Journal of Emergency Surgery emphasizes that wound irrigation and surgical debridement are more important than antibiotics and can substantially decrease infection incidence 2
Deep irrigation removes foreign bodies and pathogens, while high-pressure irrigation should be avoided as it spreads bacteria into deeper tissues 2
Tetanus prophylaxis should be administered if >10 years since the last dose for clean wounds, >5 years for dirty wounds, with Tdap preferred over Td if not previously given 1

The Clinical Infectious Diseases journal advises against closing bite wounds primarily, except for facial wounds, which require copious irrigation, cautious debridement, and preemptive antibiotics 1
First-generation cephalosporins should not be used for human bites, as they miss Eikenella corrodens 1
Fluoroquinolones should be avoided in the elderly due to tendinopathy, CNS effects, and QT prolongation risks 3
Cultures should be obtained before starting antibiotics when treating established infections 2, 4