Management of Dog Bite Infections After Augmentin Failure

Alternative Antibiotic Options

The Infectious Diseases Society of America recommends doxycycline as the preferred alternative oral agent for patients with Augmentin failure, with a strength of evidence based on multiple clinical studies 1, 4
Fluoroquinolones (ciprofloxacin, levofloxacin, moxifloxacin) plus metronidazole for anaerobic coverage are also recommended, with a moderate level of evidence 1, 4
Trimethoprim-sulfamethoxazole plus metronidazole or clindamycin (to ensure anaerobic coverage) is an alternative option, with a low to moderate level of evidence 1, 3
Beta-lactam/beta-lactamase combinations such as ampicillin-sulbactam or piperacillin-tazobactam are recommended for severe infections, with a high level of evidence 2, 3
Second-generation cephalosporins such as cefoxitin are also recommended for severe infections, with a moderate to high level of evidence 1, 2
Carbapenems (ertapenem, imipenem, meropenem) are recommended for severe infections, with a high level of evidence 2, 3

Dog bite wounds typically contain mixed aerobic and anaerobic bacteria, with a high level of evidence 1, 3
Pasteurella species are found in a significant proportion of dog bite wounds, with a moderate level of evidence 1

Repeat X-ray is strongly indicated if there is pain disproportionate to the injury near a bone or joint, with a high level of evidence 3
X-ray should be performed if there is suspicion of bone involvement or periosteal penetration, with a moderate to high level of evidence 3
X-ray should also be performed if there is progressive swelling despite appropriate antibiotic therapy, with a moderate level of evidence 3

Septic arthritis requires a 3-4 week treatment course, with a high level of evidence 3
Osteomyelitis requires a 4-6 week treatment course, with a high level of evidence 3
Subcutaneous abscess formation and tendonitis require appropriate management, with a moderate level of evidence 3

Wounds should be re-evaluated, thoroughly cleaned, and irrigated with sterile normal saline, with a high level of evidence 3
Deeper debridement may be necessary if the infection is progressing, with a moderate level of evidence 3
Elevation of the injured body part, especially if swollen, accelerates healing, with a moderate level of evidence 2
Close follow-up within 24 hours is recommended for outpatients, with a high level of evidence 3
Consider hospitalization if infection progresses despite appropriate antimicrobial therapy, with a high level of evidence 3

Avoid first-generation cephalosporins (e.g., cephalexin), penicillinase-resistant penicillins (e.g., dicloxacillin), macrolides (e.g., erythromycin), and clindamycin alone as they have poor activity against Pasteurella multocida, with a high level of evidence 1
Do not close infected wounds, with a high level of evidence 3
Do not miss evaluating for potential bone or joint involvement, which would require prolonged antibiotic therapy, with a high level of evidence 3