A Study to Assess the Safety, Tolerability, and Pharmacokinetics of Single and Multiple Doses of Cefiderocol in Hospitalized Pediatric Participants

The primary objectives of this study are: * To assess the safety and tolerability of cefiderocol after single-dose administration in hospitalized paediatric participants 3 months to \< 18 years of age with suspected or confirmed aerobic Gram-negative bacterial infections * To assess the pharmacokinetics (PK) of cefiderocol after single-dose administration of cefiderocol in hospitalized paediatric participants 3 months to \< 18 years of age with suspected or confirmed aerobic Gram-negative bacterial infections * To assess the safety and tolerability of cefiderocol after multiple-dose administration in hospitalized paediatric participants 3 months to \< 12 years of age with suspected or confirmed aerobic Gram-negative bacterial infections * To assess the PK of cefiderocol after multiple-dose administration in hospitalized paediatric participants 3 months to \< 12 years of age with suspected or confirmed aerobic Gram-negative bacterial infections