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Table 95-1

Treatment of Clostridial Infections

CONDITIONANTIBIOTIC TREATMENTPENICILLIN ALLERGYADJUNCTIVE TREATMENT/NOTE
Wound contaminationNone-Treatment should be based on clinical signs and symptoms as listed below and not solely on bacteriologic findings.
Polymicrobial anaerobic infections involving clostridia (e.g., abdominal wall, gynecologic)

Ampicillin (2 g IV q4h)

plus

Clindamycin (600-900 mg IV q6-8h)

plus

Ciprofloxacin (400 mg IV q6-8 h)

Vancomycin (1 g IV q12h)

plus

Metronidazole (500 mg IV q6h)

plus

Ciprofloxacin (400 mg IV q6-8h)

Empirical therapy should be initiated.

Therapy should be based on Gram's stain and culture results and on sensitivity data when available. Add gram-negative coverage if indicated (see text).

Clostridial sepsis

Penicillin (3-4 mU IV q4-6h)

plus

Clindamycin (600-900 mg IV q6-8h)

Clindamycin alone

or

Metronidazole (as above)

or

Vancomycin (as above)

Transient bacteremia without signs of systemic toxicity may be clinically insignificant.
Gas gangrenea

Penicillin G (4 mU IV q4-6 h)

plus

Clindamycin (600-900 mg IV q6-8h)

Cefoxitin (2 g IV q6h)

plus

Clindamycin (600-900 mg IV q6-8h)

Emergent surgical exploration and thorough debridement are extremely important.

Hyperbaric oxygen therapy may be considered after surgery and antibiotic initiation.

aC. tertium is resistant to penicillin, cephalosporins, and clindamycin. Appropriate antibiotic therapy for C. tertium infection is vancomycin (1 g q12h IV) or metronidazole (500 mg q8h IV).