Adults, infants ≥3 mth, childn & adolescents w/ complicated intra-abdominal infection (cIAI) (in combination w/ metronidazole); complicated UTI (cUTI) including pyelonephritis; hospital-acquired pneumonia (HAP) including ventilator associated pneumonia (VAP). Adults w/ bacteraemia that occurs in association w/ or is suspected to be associated w/ cIAI, cUTI or HAP/VAP.