Evaluating the effectiveness of CAZ/AVI and FOS for treating CRE infections

PK/PD Relationship of CAZ/AVI and FOS in the Treatment of Patients With Infections Due to Carbapenem-resistant Enterobacterales (CRE)

Observational IRCCS Azienda Ospedaliero-Universitaria di Bologna · NCT06717594

This study is testing whether a combination of two antibiotics, ceftazidime/avibactam and fosfomycin, can help adults with tough infections caused by drug-resistant bacteria feel better.

Quick facts

Study typeObservational
Enrollment60 (estimated)
Ages18 Years and up
SexAll
SponsorIRCCS Azienda Ospedaliero-Universitaria di Bologna Academic / other
Locations2 sites (Bologna, Bologna and 1 other locations)
Trial IDNCT06717594 on ClinicalTrials.gov

What this trial studies

This multicenter international observational study focuses on adult patients with infections caused by carbapenem-resistant Enterobacterales (CRE). It aims to assess the efficacy of ceftazidime/avibactam (CAZ/AVI) alone or in combination with fosfomycin (FOS) in achieving optimal drug exposure and patient response. The study will analyze pharmacokinetics and pharmacodynamics to determine the best treatment approaches for these challenging infections. By documenting patient outcomes, the study seeks to establish a standardized approach to managing CRE infections.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and older who have been treated for at least 48 hours with CAZ/AVI or CAZ/AVI plus FOS for a microbiologically confirmed CRE infection.

Not a fit: Patients with polymicrobial infections or those not meeting the inclusion criteria may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved treatment strategies for patients suffering from severe infections due to antibiotic-resistant bacteria.

How similar studies have performed: While the approach of combining CAZ/AVI with FOS has shown promise in vitro, this specific observational study is novel and aims to provide real-world evidence.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Signature of the informed consent
* Age ≥ 18 years
* Adult patients treated for ≥ 48 hours with CAZ/AVI or CAZ/AVI plus FOS for a microbiologically documented CRE infection

Exclusion Criteria:

* Polymicrobial/mixed infections with exception of cases with multiple Enterobacterales susceptible to study drugs

Where this trial is running

Bologna, Bologna and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Gram Negative InfectionsAntimicrobial ResistanceGram negative infectionCeftazidime/AvibactamFosfomycinPharmacokinetics/Pharmacodynamics targetsCarbapenem-resistant Enterobacterales
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.