Study of Blood Levels of Ceftaroline Fosamil in Children Who Are Receiving Antibiotic Therapy in the Hospital

Inclusion Criteria: Subjects must meet the following inclusion criteria: * Male or female children with ages from birth to younger than 12 years * Hospitalized and receiving systemic antibiotic therapy for treatment of a suspected or confirmed infection * Sufficient intravascular access * Negative urine pregnancy test * Written informed consent from parent(s)and verbal informed assent from subject Exclusion Criteria: Subjects must NOT meet any of the following exclusion criteria: * History of any hypersensitivity or allergic reaction to any β-lactam antimicrobial * Past or current history of epilepsy or seizure disorder * Moderate or severe renal impairment * If female, currently pregnant or nursing * Aspartate aminotransferase, alanine aminotransferase, or total bilirubin level \> 3 times upper limit of normal * Any condition that would make the subject, in the opinion of the Investigator, unsuitable for the study * Use of probenecid within 3 days prior to dosing * Receipt of a blood transfusion during the 24-hour period before enrollment