A Study of the Drug Activity, Safety, and Tolerability of Experimental Ceftazidime-avibactam for Infections in Newborns & Infants

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Age: -1 to -1 years old
Healthy Volunteers: No
Keywords: GRAM-NEGATIVE infection, neonatal infection, infant infection
Type: Drug study, Phase 2
2 Participants
You are being asked to take part in this study because your infant has or is suspected to have a bacterial infection. The infection requires treatment with IV antibiotics.

The purpose of this study is to learn about the effects of the study drug combination of ceftazidime (CAZ) and avibactam (AVI). We hope to confirm the best dose for treating bacterial infections in infants and neonates.

Ceftazidime (CAZ) is an antibiotic which is approved for use in infants and neonates. However, avibactam (AVI) is not approved for use in infants and neonates. The study drug, CAZ-AVI, is an experimental drug because it is not approved for use in neonates and infants from birth to less than 3 months of age.
This study requires

The study team will make sure you qualify to take part in the study. Qualified participants will receive detailed information about the study. This may include a list of study-related tests and procedures.

Who can participate

Inclusion Criteria for All Subjects 1. Evidence of a personally signed and dated informed consent document indicating that the subject’s parent(s), legal guardian, or legally acceptable representative has been informed of all pertinent aspects of the study. 2. Willing and able to comply with scheduled visits, treatment plan, laboratory tests, and other study procedures. 3. Male or female neonates and infants with age at Screening: a. Cohort 1: Full term infants (gestational age 37 weeks) with chronological age >28 days to <3 months (<89 days) or pre-term infants with corrected age >28 days to <3 months (<89 days). A maximum of 3 pre-term corrected age infants may be enrolled in each part (A and B) of Cohort 1. Sites will be notified in writing if this limit is reached.
b. Cohort 2: Full term neonates (gestational age 37 weeks) from birth to 28 days. c. Cohort 3: Pre-term neonates (gestational age 26 to <37 weeks) from birth to 28 days. Gestational age is the time elapsed between the first day of the last menstrual period and birth
Corrected age is the age of the infant from the expected date of delivery, calculated by subtracting the number of weeks born before 40 weeks of gestation from the chronological age (Engle, 2004). 3 Corrected age (in weeks) = chronological age in weeks – (40 – gestational age in weeks).

Inclusion Criteria for Part A Subjects Only 1. Hospitalized and receiving intravenous antibacterial therapy for the treatment of a suspected or confirmed bacterial infection.

Inclusion Criteria for Part B Subjects Only 1. Hospitalized with suspected or confirmed aerobic Gram-negative bacterial infection requiring intravenous antibacterial therapy. 2. Subjects must meet at least 1 clinical and 1 laboratory criterion or meet at least 2 of the clinical criteria: Clinical Criteria: a. Hypothermia (<36C) OR fever (>38.5C); b. Bradycardia OR tachycardia OR rhythm instability; c. Urine output 0.5 to 1 mL/kg/h OR hypotension OR mottled skin OR impaired peripheral perfusion; d. Petechial rash OR sclerema neonatorum; e. New onset or worsening of apnea episodes OR tachypnea episodes OR increased oxygen requirements OR requirement for ventilation support; f. Feeding intolerance OR poor suckling OR abdominal distension; g. Irritability; h. Lethargy; i. Hypotonia.

Laboratory Criteria: a. White blood cell count 4.0 × 109 /L OR 20.0 × 109 /L; b. Immature to total neutrophil ratio >0.2; c. Platelet count 100 × 109 /L; d. C-reactive protein (CRP) >15 mg/L OR procalcitonin 2 ng/mL; e. Hyperglycemia OR Hypoglycemia; f. Metabolic acidosis.

Exclusion Criteria Subjects with any of the following characteristics/conditions will not be included in the study:

Exclusion Criteria for All Subjects 1. Investigator site staff members directly involved in the conduct of the study and their family members, site staff members otherwise supervised by the Investigator, or subjects who are Pfizer employees, including their family members, directly involved in the conduct of the study. 2. Participation in another clinical study involving investigational drug(s) within 30 days prior to study entry and/or during this study participation or have previously participated in the current study or in another study of CAZ-AVI (in which an active agent was received). 3. Use of potent inhibitors of organic anion transporters OAT1 and/or OAT3 (eg, probenecid, p-aminohippuric acid (PAH), or teriflunomide) are prohibited. This prohibition of OAT1 and/or OAT3 inhibitors also applies to the mothers of any neonates or infants who are breast feeding during the trial. 4. Other acute or chronic medical or laboratory abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results and, in the judgment of the Investigator, would make the subject inappropriate for entry into this study. 5. Documented history of any hypersensitivity or allergic reaction to any -lactam antibiotic. 6. Refractory septic shock within 24 hours before screening that does not resolve after 60 minutes of vasopressor therapy.
7. Moderate or severe renal impairment defined as serum creatinine 2 times the upper limit of normal (ULN) for age OR urine output <0.5 mL/kg/h (measured over at least 8 hours) OR requirement for dialysis. Deterioration of renal function after enrollment during Part B of the study will be handled on a case-by-case basis in discussion with the Medical Monitor. 8. Evidence of progressively fatal underlying disease, or life expectancy of 60 days. 9. Documented history of seizure. 10. Active acute viral hepatitis or acute hepatic failure. 11. Known Clostridium difficile associated diarrhea. 12. Requiring or currently taking antiretroviral therapy for human immunodeficiency virus (HIV) or known HIV positive mother. 13. Any condition (eg, cystic fibrosis, urea cycle disorders), antepartum/peripartum factors, or procedures that would, in the opinion of the Investigator, make the subject unsuitable for the study, place a subject at risk, or compromise the quality of data. 14. Treatment with ceftazidime within 12 hours of CAZ-AVI administration.

Exclusion Criteria for Part A Subjects Only 1. Subject received a blood or a blood component transfusion within 24 hours of the start of CAZ-AVI infusion. 2. Subject is expected to be discharged less than 24 hours after the start of CAZ-AVI infusion.

Exclusion Criteria for Part B Subjects Only 1. At study entry, subject has confirmed or strongly suspected infection with a pathogen known to be resistant to CAZ-AVI or only a Gram-positive pathogen or viral, fungal, or parasitic pathogens as the sole cause of infection. 2. Confirmed or suspected central nervous system (CNS) infection (eg, meningitis, brain abscess, subdural abscess). 3. Anticipated need for antibacterial therapy longer than 14 days (eg, osteomyelitis, endocarditis). This applies to both study treatment with CAZ-AVI as well as adjunctive IV antibacterial treatment for suspected co-infection with Gram-positive organisms or multi-drug resistant Gram-negative organisms. 4. Receipt of more than 24 hours of nonstudy systemic antibacterial treatment for Gram-negative organisms after culture and before administration of study doses of CAZ-AVI. Empiric coverage with an aminoglycoside for suspected multidrug resistant organisms is permitted, provided CAZ-AVI is initiated within 24 hours after culture.
5. Intravenous treatment with chloramphenicol within 24 hours of administration of study doses of CAZ-AVI. 6. Subject is expected to be discharged less than 48 hours after the start of CAZ-AVI infusion.

Randomization Criteria This study is not randomized. All enrolled subjects will receive CAZ-AVI either as a single dose in Part A or multiple doses in Part B.

Benefits and risks of participating

We cannot promise any benefits to you as a result of taking part in this research study.


The study doctor will discuss the risks associated with taking part in this research study.
You will not be paid to take part in this research study.
Study duration and period
We expect that your infant will be in this study for about five (5) weeks. He/she will need to be in the hospital for the first 2-3 days of the study. They may be discharged before the 48- hour study assessments are done (depending on his/her medical condition). Your infant will have a final follow-up visit or phone call 4-5 weeks after your single dose of CAZ-AVI.
Recruitment period
From Aug. 12, 2019
UC Davis Medical Center
2315 Stockton Boulevard
Sacramento, CA 95817
Lingayo, Edward
Research Topic
  • Gram-negative Bacterial Infection

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