Study of Cefiderocol (S-649266) or Best Available Therapy for the Treatment of Severe Infections Caused by Carbapenem-resistant Gram-negative Pathogens

Phase 3

Completed

Conditions: Hospital Acquired Pneumonia (HAP)
Complicated Urinary Tract Infection (cUTI)
Ventilator Associated Pneumonia (VAP)
Healthcare-associated Pneumonia (HCAP)
Sepsis
Bloodstream Infections (BSI)

Interventions: Drug: Best Available Therapy
Drug: Cefiderocol

Registration Number: NCT02714595

Lead Sponsor: Shionogi

Brief Summary: This study is designed to provide evidence of efficacy of cefiderocol in the treatment of serious infections in adult patients caused by carbapenem-resistant Gram-negative pathogens.

Detailed Description: This study is designed to provide evidence of efficacy of cefiderocol in the treatment of serious infections in adult patients with either hospital-acquired pneumonia (HAP), ventilator-associated pneumonia (VAP), healthcare-associated pneumonia (HCAP), complicated urinary tract infection (cUTI), or bloodstream infections (BSI)/sepsis caused by carbapenem-resistant Gram-negative pathogens.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 152

Inclusion Criteria

Patients with clinically documented infection (HAP/VAP/HCAP, cUTI, or BSI/sepsis) caused by a Gram-negative pathogen with evidence of carbapenem resistance
Patients who have been treated previously with an empiric antibiotic regiment and failed treatment, both clinically and microbiologically, are eligible for the study, if they have an identified carbapenem-resistant Gram-negative pathogen which has either been shown to be nonsusceptible in vitro to each of the antibiotic(s) of the empiric antibiotic regimen or been grown from a culture performed after at least 2 days of the empiric antibiotic regimen
Patient is male (no contraception required) or female and meets one of the following criteria:
- Surgically sterile by hysterectomy and/or bilateral oophorectomy or bilateral salpingectomy or tubal ligation for the purpose of contraception for at least 6 weeks with appropriate documentation of such surgery
- Postmenopausal (defined as older than 45 years of age with cessation of regular menstrual periods for 6 months and confirmed by a follicle-stimulating hormone level of > 40 mIU/mL, or amenorrhea for at least 12 months)
- Of childbearing potential and using combined (estrogen and progestogen) or progestogen-only hormonal contraception associated with inhibition of ovulation (including oral, intravaginal, injectable, implantable, and transdermal contraceptives), or an intrauterine device (IUD), or intrauterine hormone-releasing system (IUS) for the entire duration of the study
- Of childbearing potential and practice abstinence as a preferred and usual lifestyle, and agrees to continue practicing abstinence from Screening and for the entire duration of the study
- Of childbearing potential, whose sole heterosexual partner has been successfully vasectomized and agrees to not have other heterosexual partners for the entire duration of the study
Patients meeting specific criteria for each infection site

Exclusion Criteria

Patients who have a history of any moderate or severe hypersensitivity or allergic reaction to any β-lactam (Note: for β-lactams, a history of a mild rash followed by uneventful re-exposure is not a contraindication to enrollment)
Patients who need more than 3 systemic antibiotics as part of best available therapy (BAT) for the treatment of the Gram-negative infection (patients with mixed Gram-positive or anaerobic infections may receive appropriate concomitant narrow spectrum antibiotics [eg, vancomycin, linezolid, metronidazole, clindamycin])
Patients with coinfection caused by invasive aspergillosis, mucormycosis or other highly lethal mold
Patients who have central nervous system (CNS) infection (eg, meningitis, brain abscess, shunt infection)
Patients with infection requiring > 3 weeks of antibiotic treatment (eg, bone and joint infection, endocarditis)
Patients with cystic fibrosis or moderate to severe bronchiectasis
Patients in refractory septic shock defined as persistent hypotension despite adequate fluid resuscitation or despite vasopressive therapy at the time of Randomization
Patients with severe neutropenia, ie, polymorphonuclear neutrophils (PMNs) < 100 cells/μL
Female patients who have a positive pregnancy test at Screening or who are lactating
Patients with Acute Physiology and Chronic Health Evaluation II (APACHE II) score > 30
Patients who have received a potentially effective antibiotic regimen for the carbapenem-resistant Gram-negative infection for a continuous duration of more than 24 hours in cUTI, or 36 hours in HAP/VAP/HCAP or BSI/sepsis during the 72 hours leading to Randomization
Patients with any condition or circumstance that, in the opinion of the investigator, would compromise the safety of the patient or the quality of the study data
Patients who have received another investigational drug or device within 30 days prior to study entry
Patients who have previously been randomized in this study or received S-649266
Patients receiving peritoneal dialysis
Patients meeting specific exclusion criteria for each infection site

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Best Available Therapy (BAT)	Best Available Therapy	Best available therapy (BAT) will be chosen by the investigator and may include up to three antibacterial agents for carbapenem resistant Gram-negative bacteria, intravenously administered per country-specific guidelines for 7-14 days. Treatment could be extended to 21 days at the discretion of the investigator.
Cefiderocol	Cefiderocol	Participants will receive cefiderocol 2 g administered intravenously over 3 hours, every 8 hours for 7-14 days. Treatment could be extended to 21 days at the discretion of the investigator.

Primary Outcome Measures

Name	Time	Method
Percentage of Participants With Clinical Cure at Test of Cure (TOC) in Participants With HAP/VAP/HCAP or BSI/Sepsis	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. HAP/VAP/HCAP: Clinical cure was defined as resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Clinical cure was defined as resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. Participants with missing data were considered as non-responders.
Percentage of Participants With Microbiologic Eradication at TOC in Participants With cUTI	Test of cure, defined as 7 days after the end of treatment, equivalent to Study Days 14 to 21	Microbiological outcome per Baseline pathogen was determined by the sponsor as defined for each infection site. For cUTI eradication was defined as a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ colony-forming units (CFU)/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.

Secondary Outcome Measures

Name	Time	Method
Percentage of Participants With Clinical Cure at Test of Cure in Participants With cUTI	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Sustained Clinical Cure at Follow-up By Baseline Pathogen	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. Sustained clinical cure for HAP/VAP/HCAP: Continued resolution or substantial improvement of Baseline signs and symptoms of pneumonia, such that no antibacterial therapy was required for the treatment of pneumonia in a participant assessed as cured at TOC. BSI/Sepsis: Continued resolution or substantial improvement of Baseline signs and symptoms associated with reduction in SOFA score, such that no antibacterial therapy was required for the treatment of the original BSI/sepsis in a participant assessed as cured at TOC. cUTI: Continued resolution or improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, in a participant assessed as cured at TOC.
Percentage of Participants With Sustained Microbiologic Eradication at Follow-up in Participants With HAP/VAP/HCAP + BSI/Sepsis, and Overall	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Microbiological outcomes per Baseline pathogen at FU were determined according to the following criteria for each diagnosis: HAP/VAP/HCAP: Sustained eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen after TOC. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture or other primary source after TOC as applicable. For HAP/VAP/HCAP and sepsis if an appropriate clinical culture could not be obtained and the participant had a successful clinical response after TOC, the response was presumed sustained eradication. cUTI: a culture taken any time after documented eradication at TOC, and a urine culture obtained at FU showed that the Baseline uropathogen found at entry at ≥10⁵ CFU/mL remained \< 10³ CFU/mL. Overall per-participant response was defined as sustained eradication of all Baseline Gram-negative pathogens after documented eradication at TOC.
Percentage of Participants With Clinical Cure at End of Treatment (EOT) in Participants With HAP/VAP/HCAP or BSI/Sepsis	End of treatment, Day 7 to 14	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. HAP/VAP/HCAP: Clinical cure was defined as resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Clinical cure was defined as resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen.
Percentage of Participants With Clinical Cure at End of Treatment (EOT) in Participants With cUTI	End of treatment, Day 7 to 14	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Sustained Clinical Cure at Follow-up in Participants With cUTI	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. Sustained clinical cure for cUTI: Continued resolution or improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, in a participant assessed as cured at TOC.
Percentage of Participants With Clinical Cure at End of Treatment in Participants With HAP/VAP/HCAP + BSI/Sepsis, and Overall	End of treatment, Day 7 to 14	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. HAP/VAP/HCAP: Resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Microbiologic Eradication at EOT in Participants With HAP/VAP/HCAP or BSI/Sepsis	End of treatment, Day 7 to 14	Microbiological outcomes per Baseline pathogen were determined by the sponsor according to the following criteria established for each infection site: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen (sputum, tracheal aspirate, bronchoalveolar lavage (BAL) fluid, protected specimen brush, pleural fluid, or lung biopsy). If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Microbiologic Eradication at TOC in Participants With HAP/VAP/HCAP or BSI/Sepsis	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Microbiological outcomes per Baseline pathogen were determined by the sponsor according to the following criteria established for each infection site: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen (sputum, tracheal aspirate, bronchoalveolar lavage (BAL) fluid, protected specimen brush, pleural fluid, or lung biopsy). If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Sustained Microbiologic Eradication at Follow-up in Participants With HAP/VAP/HCAP or BSI/Sepsis	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Microbiological outcomes per Baseline pathogen at FU were determined according to the following criteria for each diagnosis: HAP/VAP/HCAP: Sustained eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen after TOC. If an appropriate clinical culture could not be obtained and the participant had a successful clinical response after TOC, the response was presumed sustained eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture or other primary source after TOC as applicable. For sepsis, if the participant has a successful clinical outcome after TOC and an appropriate clinical culture could not be obtained, the response was presumed sustained eradication. Overall per-participant response was defined as sustained eradication of all Baseline Gram-negative pathogens after documented eradication at TOC.
Percentage of Participants With Sustained Clinical Cure at Follow-up (FU) in Participants With HAP/VAP/HCAP or BSI/Sepsis	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. Sustained clinical cure for HAP/VAP/HCAP: Continued resolution or substantial improvement of Baseline signs and symptoms of pneumonia, such that no antibacterial therapy was required for the treatment of pneumonia in a participant assessed as cured at TOC. BSI/Sepsis: Continued resolution or substantial improvement of Baseline signs and symptoms associated with reduction in SOFA score, such that no antibacterial therapy was required for the treatment of the original BSI/sepsis in a participant assessed as cured at TOC.
Percentage of Participants With Sustained Clinical Cure at Follow-up in Participants With HAP/VAP/HCAP + BSI/Sepsis, and Overall	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. Sustained clinical cure for HAP/VAP/HCAP: Continued resolution or substantial improvement of Baseline signs and symptoms of pneumonia, such that no antibacterial therapy is required for the treatment of pneumonia in a participant assessed as cured at TOC. BSI/Sepsis: Continued resolution or substantial improvement of Baseline signs and symptoms associated with reduction in SOFA score, such that no antibacterial therapy is required for the treatment of the original BSI/sepsis in a participant assessed as cured at TOC. cUTI: Continued resolution or improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, in a participant assessed as cured at TOC.
Percentage of Participants With Clinical Cure at Test of Cure By Baseline Pathogen	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. HAP/VAP/HCAP: Resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Clinical Cure at Test of Cure in Participants With HAP/VAP/HCAP + BSI/Sepsis, and Overall	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. HAP/VAP/HCAP: Resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Clinical Cure at End of Treatment By Baseline Pathogen	End of treatment, Day 7 to 14	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis: HAP/VAP/HCAP: Resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Clinical Cure at EOT By Baseline Carbapenem-resistant Pathogen	End of treatment, Day 7 to 14	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis: HAP/VAP/HCAP: Resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Sustained Clinical Cure at Follow-up By Baseline Carbapenem-resistant Pathogen	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis. Sustained clinical cure for HAP/VAP/HCAP: Continued resolution or substantial improvement of Baseline signs and symptoms of pneumonia, such that no antibacterial therapy was required for the treatment of pneumonia in a participant assessed as cured at TOC. BSI/Sepsis: Continued resolution or substantial improvement of Baseline signs and symptoms associated with reduction in SOFA score, such that no antibacterial therapy was required for the treatment of the original BSI/sepsis in a participant assessed as cured at TOC. cUTI: Continued resolution or improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, in a participant assessed as cured at TOC.
Percentage of Participants With Microbiologic Eradication at EOT in Participants With HAP/VAP/HCAP + BSI/Sepsis, and Overall	End of treatment, Day 7 to 14	Microbiological outcomes per Baseline pathogen were determined by the sponsor according to the following criteria for each diagnosis: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen. If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. cUTI: a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Clinical Cure at TOC By Baseline Carbapenem-resistant Pathogen	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Clinical response was based on the investigator's evaluation of the participant's clinical signs and symptoms and was defined for each diagnosis: HAP/VAP/HCAP: Resolution or substantial improvement of Baseline signs and symptoms of pneumonia including a reduction in SOFA and CPIS scores, and improvement or lack of progression of chest radiographic abnormalities such that no antibacterial therapy was required for the treatment of the current infection. BSI/Sepsis: Resolution or substantial improvement of Baseline signs and symptoms including a reduction in SOFA score, such that no antibacterial therapy was required for the treatment of BSI/sepsis. Participants with bacteremia must have eradication of bacteremia caused by the Gram-negative pathogen. cUTI: Resolution or substantial improvement of Baseline signs and symptoms of cUTI, or return to pre-infection Baseline if known, such that no antibacterial therapy is required for the treatment of the current infection.
Percentage of Participants With Sustained Microbiologic Eradication at Follow-up in Participants With cUTI	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Microbiological outcome per Baseline pathogen at follow-up was determined by the sponsor as defined for each infection site. For cUTI sustained eradication was defined as a culture taken any time after documented eradication at TOC and a urine culture obtained at FU showed that the Baseline uropathogen found at entry at ≥10⁵ CFU/mL remained \<10³ CFU/mL. Overall per-participant sustained eradication was defined as sustained eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With a Composite Clinical and Microbiological Response at EOT	End of treatment, Day 7 to 14	The composite clinical and microbiological response rate is defined as the percentage of participants with both clinical cure and microbiologic eradication, as defined above for each site of infection.
All-cause Mortality at Day 14 and Day 28	Day 14 and Day 28	The all-cause mortality rate at Day 14 and Day 28 was calculated as the percentage of participants who experienced mortality regardless of the cause at or before Day 14 and Day 28, respectively.
Percentage of Participants With Microbiologic Eradication at EOT in Participants With cUTI	End of treatment, Day 7 to 14	Microbiological outcome per Baseline pathogen was determined by the sponsor as defined for each infection site. For cUTI eradication was defined as a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Microbiologic Eradication at TOC in Participants With HAP/VAP/HCAP + BSI/Sepsis, and Overall	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Microbiological outcomes per Baseline pathogen were determined by the sponsor according to the following criteria for each diagnosis: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen. If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. cUTI: a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Microbiologic Eradication at EOT By Baseline Pathogen	End of treatment, Day 7 to 14	Microbiological outcomes per Baseline pathogen were determined by the sponsor according to the following criteria for each diagnosis: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen. If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. cUTI: a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Microbiologic Eradication at TOC By Baseline Pathogen	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Microbiological outcomes per Baseline pathogen were determined by the sponsor according to the following criteria for each diagnosis: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen. If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. cUTI: a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Survival Time	Days 1 to 10, 11 to 20, 21 to 30, 31 to 40, 41-50, and 51 to 60.	Survival time was analyzed by Kaplan-Meier survival curve. The table below presents deaths that occurred in10-day time intervals through the end of study
Change From Baseline in Clinical Pulmonary Infection Score (CPIS) in Participants With Pneumonia (HAP/VAP/HCAP)	Baseline, end of treatment (Day 7-14), test of cure (7 days after end of treatment, equivalent to Study Day 14 to 21) and follow-up (14 days after end of treatment, equivalent to Study Day 21 to 28)	Clinical pulmonary infection score (CPIS) is a surrogate for diagnosis and treatment response. Points (0, 1, or 2) are assigned for observed findings for 5 variables including body temperature, white blood cell count, tracheal secretions, ratio of arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2), and chest radiograph infiltrates. The total score ranges from 0 to 10, where higher scores may indicate a higher likelihood of mortality; a negative change from Baseline indicates improvement
Number of Participants With Adverse Events	From first dose of study drug up to 28 days after last dose; maximum treatment duration was 29 days in the cefiderocol group and 22 days in the BAT group.	The severity of each adverse event (AE) was graded by the investigator according to the following definitions: * Mild: Symptom or finding is minor and does not interfere with usual daily activities * Moderate: The event causes discomfort and interferes with usual daily activity or affects clinical status * Severe: The event causes interruption of usual daily activities or has a clinically significant effect The relationship of AEs to study treatment was determined by the investigator according to the following definition: ● Related: An AE which can be reasonably explained as having been caused by the study treatment. A serious AE is defined as any AE that resulted in any of the following outcomes: * Death * Life-threatening condition * Hospitalization or prolongation of existing hospitalization * Persistent or significant disability/incapacity * Congenital anomaly/birth defect * Other medically important condition
Percentage of Participants With Microbiologic Eradication at EOT By Baseline Carbapenem-resistant Pathogen	End of treatment, Day 7 to 14	Microbiological outcome per Baseline carbapenem-resistant pathogen were determined according to the following criteria for each diagnosis: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen. If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. cUTI: a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Sustained Microbiologic Eradication at Follow-up By Baseline Carbapenem-resistant Pathogen	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Microbiological outcomes per Baseline pathogen at FU were determined according to the following criteria for each diagnosis: HAP/VAP/HCAP: Sustained eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen after TOC. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture or other primary source after TOC as applicable. For HAP/VAP/HCAP and sepsis if an appropriate clinical culture could not be obtained and the participant had a successful clinical response after TOC, the response was presumed sustained eradication. cUTI: a culture taken any time after documented eradication at TOC, and a urine culture obtained at FU showed that the Baseline uropathogen found at entry at ≥10⁵ CFU/mL remained \< 10³ CFU/mL. Overall per-participant response was defined as sustained eradication of all Baseline Gram-negative pathogens after documented eradication at TOC.
Percentage of Participants With Microbiologic Eradication at TOC in Participants With Documented Carbapenem-resistant Gram-negative Bacteremia	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	The percentage of participants who experienced eradication of the Baseline documented carbapenem-resistant Gram-negative bacteremia, defined as absence of the Baseline Gram-negative pathogen from a blood culture.
Percentage of Participants With a Composite Clinical and Microbiological Response at TOC	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	The composite clinical and microbiological response rate is defined as the percentage of participants with both clinical cure and microbiologic eradication, as defined above for each site of infection.
Change From Baseline in Sequential Organ Failure Assessment (SOFA)	Baseline, end of treatment (Day 7 to 14), test of cure (7 days after end of treatment, equivalent to Study Day 14 to 21) and follow-up (14 days after end of treatment, equivalent to Study Day 21 to 28)	The SOFA score is a scoring system to determine the extent of a patient's organ function or rate of failure. The score is based on six different scores, one each for the respiratory, cardiovascular, hepatic, coagulation, renal, and neurological systems. Each score is from 0 to 4, and the total score ranges from 0 to 24, where higher scores indicate a higher likelihood of mortality. A negative change from Baseline score indicates improvement.
Percentage of Participants With Sustained Microbiologic Eradication at Follow-up By Baseline Pathogen	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	Microbiological outcomes per Baseline pathogen at FU were determined according to the following criteria for each diagnosis: HAP/VAP/HCAP: Sustained eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen after TOC. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture or other primary source after TOC as applicable. For HAP/VAP/HCAP and sepsis if an appropriate clinical culture could not be obtained and the participant had a successful clinical response after TOC, the response was presumed sustained eradication. cUTI: a culture taken any time after documented eradication at TOC, and a urine culture obtained at FU showed that the Baseline uropathogen found at entry at ≥10⁵ CFU/mL remained \< 10³ CFU/mL. Overall per-participant response was defined as sustained eradication of all Baseline Gram-negative pathogens after documented eradication at TOC.
Percentage of Participants With Microbiologic Eradication at TOC By Baseline Carbapenem-resistant Pathogen	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21	Microbiological outcome per Baseline carbapenem-resistant pathogen were determined according to the following criteria for each diagnosis: HAP/VAP/HCAP: Eradication was defined as the absence of the Baseline Gram-negative pathogen from an appropriate clinical specimen. If it was not possible to obtain an appropriate clinical culture and the participant had a successful clinical outcome, the response was presumed to be eradication. BSI/Sepsis: Absence of the Baseline Gram-negative pathogen from a blood culture and/or other primary source as applicable. In the case of sepsis, if the participant had a successful clinical outcome and it was not possible to obtain an appropriate clinical culture, the response was presumed to be eradication. cUTI: a urine culture that showed that the Gram-negative uropathogen identified at Baseline at ≥ 10⁵ CFU/mL was reduced to \< 10³ CFU/mL. Overall per-participant eradication was defined as eradication of all Baseline Gram-negative pathogens.
Percentage of Participants With Sustained Microbiologic Eradication at Follow-up in Participants With Documented Carbapenem-resistant Gram-negative Bacteremia	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	The percentage of participants who experienced sustained eradication of the Baseline documented carbapenem-resistant Gram-negative bacteremia, defined as absence of the Baseline Gram-negative pathogen from a blood culture after TOC.
Percentage of Participants With a Composite Clinical and Microbiological Response at Follow-up	Follow-up, defined as 14 days after the end of treatment, equivalent to Study Day 21 to 28	The composite clinical and microbiological response rate is defined as the percentage of participants with both sustained clinical cure and sustained microbiologic eradication, as defined above for each site of infection.
Percentage of Participants Alive and With No Change in Antibiotic Treatment Due to Either Lack of Therapeutic Benefit or Drug-related Toxicity at TOC	Test of cure, defined as 7 days after end of treatment, equivalent to Study Day 14 to 21
Percentage of Participants With Microbiologic Eradication at EOT in Participants With Documented Carbapenem-resistant Gram-negative Bacteremia	End of treatment, Day 7 to 14	The percentage of participants who experienced eradication of the Baseline documented carbapenem-resistant Gram-negative bacteremia, defined as absence of the Baseline Gram-negative pathogen from a blood culture.