<qa>  What is the name of the drug that may be used to treat infants?Other antimicrobial treatments Investigators are encouraged to provide infants with concomitant aminoglycoside therapy. Use of other antimicrobial agents vancomycin, antifungals may be given per local standard of care. A maximum of 6 doses of on study piperacillin-tazobactam will be administered under this protocol. Additional doses piperacillin-tazobactam or other antimicrobials may be administered per standard of care but will not be recorded on study CRFs. 