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Scientists seek best dose of Last-Resort antibiotics for superbug infections

NCT ID NCT06717594

Knowledge-focused Sponsor: IRCCS Azienda Ospedaliero-Universitaria di Bologna Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This observational study is looking at how two antibiotics, ceftazidime/avibactam and fosfomycin, work in the body to treat infections caused by carbapenem-resistant Enterobacterales (CRE), a type of superbug. Researchers will monitor 60 adult patients to see if the drug levels in their blood reach targets that effectively kill the bacteria. The goal is to find the right dosing to improve treatment for these difficult infections.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ceftazidime/avibactam and fosfomycin
What this could lead to
If successful, this study could help doctors determine the most effective dosing of these antibiotics for treating hard-to-kill CRE infections.
What could go wrong
This is an observational study, not a controlled trial, so it cannot prove cause and effect. The small size (60 participants) and focus on specific bacteria may limit how widely the results apply.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 60 people

The number the study aims to enrol. It can still change while the study runs.

Started

Dec 2023

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Adult patients with infection due to a difficult-to-treat Gram-negative bacteria, treated with CAZ/AVI alone or CAZ/AVI plus FOS, hospitalized during the study period in the participating centers, will be screened for inclusion

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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

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Conditions

The condition(s) this trial relates to.

gram-negative bacterial infections

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Antimicrobial resistance (AMR) Gram negative infections

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites in 2 countries. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • IRCCS Azienda Ospedaliero-Universitaria di Bologna

    RECRUITING

    Bologna, Bologna, 40138, Italy

  • Instituto de Biomedicina de Sevilla (IBiS), Hospital Virgen Macarena/CSIC/Universidad de Sevilla

    RECRUITING

    Seville, Seville, 41013, Spain

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