≥32 to <37 weeks, aged ≤28 days), term neonates (gestational age ≥37 weeks, aged ≤28 days) or young infants (aged 28 days to 3 months inclusive) who will be receiving at least 24 hours of appropriate non-investigational intravenous antiinfective treatment other than glycopeptide antibiotics for known or suspected bacterial infections. Patients with urinary tract infections due to Gram-positive organisms may be enrolled