- Analytical data of renal and/or liver dysfunction (serum creatinine ≥ 1.2 mg/dl, serum sodium ≤ 130 mEq/l, serum bilirubin ≥4 mg/dl). Patients with pneumonia or documented bacteremia (positive blood cultures) will require the presence of at least 1 of these analytical criteria to be included in the study. Patients with urinary infection, skin/soft tissue infection, acute cholangitis or suspected bacterial infection will require 2 or more criteria for inclusion