Table 1.
Anatomic site involved |
First-line therapy |
Alternative | IgE-mediated penicillin/ cephalosporin allergy |
Not routinely recommended |
---|---|---|---|---|
Gastroduodenal | Cefazolin | Cefotaxime or ceftriaxone |
Clindamycin plus fluoroquinolone (ciprofloxacin), fluoroquinolone (levofloxacin), clindamycin plus aminoglycoside (gentamicin or tobramycin or amikacin)† or clindamycin plus aztreonam‡ |
β-lactam/β-lactamase inhibitors (ampicillin/sulbactam or piperacillin/tazobactam or ticarcillin/clavulanic acid) Cephalosporins (ceftazidime or cefepime) Carbapenems (ertapenem, meropenem, imipenem or doripenem) Tigecycline |
Ileal involvement | Cefoxitin, or cefazolin plus metronidazole |
Cefotaxime plus metronidazole or ceftriaxone plus metronidazole |
Fluoroquinolone (moxifloxacin), metronidazole plus fluoroquinolone (levofloxacin) or clindamycin plus aztreonam plus metronidazole |
β-lactam/β-lactamase inhibitors (ampicillin/sulbactam, piperacillin/tazobactam or ticarcillin/clavulanic acid) Cephalosporins (ceftazidime or cefepime) Carbapenems (ertapenem, meropenem, imipenem or doripenem) Tigecycline |
Depending on local Gram-negative susceptibility.
Aztreonam has demonstrated in vitro cross-reactivity with ceftazidime [90].