Assertion: aztreonam's activity | /r/HasProperty | β-lactams
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text: Patients with late-onset pneumonia (≥5 days of hospitalization) or risk factors should be covered with antibiotic drugs with acceptable antipseudomonal activity (Figure 2), including select fluoroquinolones, aminoglycosides, β-lactams with or without β-lactamase inhibitors, and third-generation cephalosporins, as well as imipenem, meropenem, and aztreonam.