Efficacy and Safety of Imipenem+Cilastatin/Relebactam (MK-7655A) in Japanese Participants With Complicated Intra-abdominal Infection or Complicated Urinary Tract Infection (MK-7655A-017)

Inclusion Criteria: * requires hospitalization and treatment with IV antibiotic therapy for complicated intraabdominal infection (cIAI) or complicated urinary tract infection (cUTI). Per-protocol diagnostic criteria apply to the qualifying infection types. * infection is known or thought to be caused by microorganisms susceptible to the IV study therapy * baseline specimen for primary infection site culture obtained at operative procedure in Screening period or at Baseline for cIAI participants, and within 48 hours before initiation of IV study drug for cUTI participants * female or male who is not of reproductive potential, or female or male who is of reproductive potential and agrees to avoid becoming pregnant or impregnating a partner from the time of consent through completion of the study, by practicing abstinence from heterosexual activity or using acceptable contraception during heterosexual activity. Exclusion Criteria: * received any amount of effective antibiotic therapy after obtaining the culture for admission to the study and before administration of the first dose of IV study therapy * received treatment with systemic effective antibiotics for \>24 hours within the 72 hours before initiation of study therapy * has a concurrent infection, including endocarditis, osteomyelitis, meningitis, or prosthetic joint infection, that would interfere with evaluation of response to IMI/REL * has a cIAI or cUTI due to a confirmed fungal pathogen * has a cUTI that meets any of the following: 1) complete obstruction of any portion of the urinary tract, 2) known ileal loop, 3) intractable vesico-ureteral reflux, 4) presence of indwelling urinary catheter which cannot be removed at study entry * has a cIAI that meets any of the following: 1) infection that should be managed by Staged Abdominal Repair (STAR) or open abdomen therapy, 2) infection limited to the hollow viscus * history of serious allergy, hypersensitivity, or any serious reaction to any carbapenem, cephalosporin, penicillin or other beta-lactam agent, or other beta-lactamase inhibitors * female who is pregnant or is expecting to conceive, is breastfeeding, or plans to breastfeed before completion of the study * history of a seizure disorder * anticipates to be treated with valproic acid, concomitant IV or an oral antimicrobial considered effective to the index pathogen, in addition to the study treatment * is receiving immunosuppressive therapy, including high-dose corticosteroids * is undergoing hemodialysis or peritoneal dialysis * participated in any other clinical study involving an investigational or experimental medication during the previous 30 days before Screening.