NCT07285213

Brief Summary

The purpose of this study is to evaluate the efficacy and safety of AZD5148 for prevention of recurrence of Clostridioides difficile infection in Individuals 18 years of age and above.

Trial Health

88
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Strong global presence with extensive site network
Enrollment
230

participants targeted

Target at P75+ for phase_2

Timeline
21mo left

Started Dec 2025

Geographic Reach
14 countries

114 active sites

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress19%
Dec 2025Jan 2028

First Submitted

Initial submission to the registry

November 20, 2025

Completed
20 days until next milestone

Study Start

First participant enrolled

December 10, 2025

Completed
6 days until next milestone

First Posted

Study publicly available on registry

December 16, 2025

Completed
1.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 20, 2027

Expected
9 months until next milestone

Study Completion

Last participant's last visit for all outcomes

January 18, 2028

Last Updated

May 5, 2026

Status Verified

May 1, 2026

Enrollment Period

1.4 years

First QC Date

November 20, 2025

Last Update Submit

May 4, 2026

Conditions

Keywords

Clostridioides Difficile infectionC. DiffCDiffClostridiodes Difficile Infection prevention of recurrence

Outcome Measures

Primary Outcomes (1)

  • First occurrence of recurrence of C difficile infection

    rCDI is a recurrence of C difficile infection (CDI) occurring after initial clinical cure of the qualifying CDI. CDI is defined as a history of diarrhea (\>=3 unformed stools, ie, type 6 or 7 stool on Bristol Stool Scale in \<=24 hours for 2 consecutive calendar days) accompanied by a positive stool test for C difficile toxin.

    Day 1 through day 91

Secondary Outcomes (17)

  • Sustained clinical cure

    Day 91

  • Duration of recurrent C difficile infection

    Day 1 through Day 91

  • First occurrence of severe recurrent C difficile infection

    Day 1 through Day 91

  • First occurrence of fulminant recurrent C difficile infection

    Day 1 through Day 91

  • Severity of participant reported diarrhea symptoms

    Day 1 through Day 91

  • +12 more secondary outcomes

Study Arms (2)

AZD5148: dose A

EXPERIMENTAL

Participants will receive a single dose A of AZD5148 administered via either intramuscular injection or intravenous push.

Drug: AZD5148

Placebo

PLACEBO COMPARATOR

Participants will receive a single dose of placebo via intramuscular or intravenous push.

Other: Placebo

Interventions

Participants will receive a single dose A of AZD5148 administered via either intramuscular injection or intravenous push.

AZD5148: dose A
PlaceboOTHER

Participants will receive a single dose of placebo (0.9% (w/v) sodium chloride for injection) administered via either intramuscular injection or intravenous push.

Placebo

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Participant must be ≥ 18 years of age at the time of signing the informed consent, capable of giving signed informed consent.
  • Participants with a qualifying C. difficile infection episode at the time of providing informed consent defined by:
  • Positive local C. difficile toxin test (eg, immune assay or CCNA) on an unformed stool sample collected during this episode, and
  • Receipt of standard of care antibacterial drug therapy for C. difficile infection (fidaxomicin, vancomycin or metronidazole) for this episode, with planned duration of at least 10 and at most 25 days at time of IMP administration.
  • Note: Diarrhea is not required to be present on the day of investigational medicinal product (IMP) administration.
  • Body weight ≥ 40 kg

You may not qualify if:

  • History of inflammatory bowel disease (eg, ulcerative colitis, Crohn's disease, microscopic colitis).
  • Participant with a non - CDI (C. difficile infection) condition such that the participant routinely passes loose stool (eg, patients with an ostomy)
  • Planned surgery for C. difficile infection within 24 hours of enrollment
  • Current toxic megacolon and/or small bowel ileus
  • Any history of total colectomy or bariatric surgery (bariatric surgery which does not disrupt the gastrointestinal lumen, ie, restrictive procedures such as banding, are permitted).
  • Major gastrointestinal surgery as assessed by the Investigator (eg, significant bowel resection or diversion) within 90 days before enrollment (this does not include appendectomy or cholecystectomy)
  • Due to receive more than 25 days of antibacterial drug therapy for C. difficile infection for the qualifying C. difficile infection episode
  • Treatment with a fecal donor transplant or fecal microbiota product in the 180 days before IMP administration, are receiving or planned administration for the qualifying episode of C. difficile infection, or planned administration during the 180 days after IMP administration
  • Treatment with bezlotoxumab in the 180 days before IMP administration, are receiving or planned administration for the qualifying episode of CDI, or planned administration during the 180 days after IMP administration.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (114)

Research Site

Phoenix, Arizona, 85032, United States

WITHDRAWN

Research Site

Chula Vista, California, 91911, United States

WITHDRAWN

Research Site

Sacramento, California, 95817, United States

NOT YET RECRUITING

Research Site

Torrance, California, 90502, United States

RECRUITING

Research Site

Hamden, Connecticut, 06518, United States

RECRUITING

Research Site

Gainesville, Florida, 32605, United States

RECRUITING

Research Site

Hialeah, Florida, 33016, United States

NOT YET RECRUITING

Research Site

Homestead, Florida, 33033, United States

RECRUITING

Research Site

Jacksonville, Florida, 32256, United States

RECRUITING

Research Site

Miami Lakes, Florida, 33014, United States

WITHDRAWN

Research Site

Miramar, Florida, 33027, United States

RECRUITING

Research Site

Port Orange, Florida, 32127, United States

WITHDRAWN

Research Site

Tamarac, Florida, 33321, United States

RECRUITING

Research Site

Tampa, Florida, 33607, United States

WITHDRAWN

Research Site

Athens, Georgia, 30606, United States

RECRUITING

Research Site

Atlanta, Georgia, 30322, United States

NOT YET RECRUITING

Research Site

Idaho Falls, Idaho, 83404, United States

RECRUITING

Research Site

Burr Ridge, Illinois, 60527, United States

RECRUITING

Research Site

Lexington, Kentucky, 40509, United States

RECRUITING

Research Site

Louisville, Kentucky, 40202, United States

NOT YET RECRUITING

Research Site

New Orleans, Louisiana, 70121, United States

NOT YET RECRUITING

Research Site

Glen Burnie, Maryland, 21061, United States

RECRUITING

Research Site

Potomac, Maryland, 20854, United States

RECRUITING

Research Site

Boston, Massachusetts, 02114, United States

RECRUITING

Research Site

Boston, Massachusetts, 02115, United States

NOT YET RECRUITING

Research Site

Detroit, Michigan, 48202, United States

RECRUITING

Research Site

Royal Oak, Michigan, 48073, United States

NOT YET RECRUITING

Research Site

Columbia, Missouri, 65212, United States

NOT YET RECRUITING

Research Site

St Louis, Missouri, 63130, United States

NOT YET RECRUITING

Research Site

Union City, New Jersey, 07087, United States

NOT YET RECRUITING

Research Site

Hartsdale, New York, 10530, United States

WITHDRAWN

Research Site

Inwood, New York, 11096, United States

WITHDRAWN

Research Site

The Bronx, New York, 10451, United States

RECRUITING

Research Site

Salisbury, North Carolina, 28144, United States

RECRUITING

Research Site

Winston-Salem, North Carolina, 27103, United States

RECRUITING

Research Site

Pittsburgh, Pennsylvania, 15237, United States

WITHDRAWN

Research Site

Johnson City, Tennessee, 37614, United States

NOT YET RECRUITING

Research Site

Charlottesville, Virginia, 22903, United States

NOT YET RECRUITING

Research Site

Lynchburg, Virginia, 24501, United States

RECRUITING

Research Site

Roanoke, Virginia, 24014, United States

RECRUITING

Research Site

Seattle, Washington, 98109, United States

NOT YET RECRUITING

Research Site

Madison, Wisconsin, 53705, United States

NOT YET RECRUITING

Research Site

Camperdown, 2050, Australia

RECRUITING

Research Site

Clayton, 3168, Australia

RECRUITING

Research Site

Herston, 4029, Australia

RECRUITING

Research Site

Melbourne, 3000, Australia

RECRUITING

Research Site

South Brisbane, 4101, Australia

RECRUITING

Research Site

Edmonton, Alberta, T6G 2X8, Canada

WITHDRAWN

Research Site

Vancouver, British Columbia, V5Z 1M9, Canada

NOT YET RECRUITING

Research Site

Victoria, British Columbia, V8T 5G4, Canada

WITHDRAWN

Research Site

Halifax, Nova Scotia, B3K 6R8, Canada

NOT YET RECRUITING

Research Site

Hamilton, Ontario, L8N 4A6, Canada

NOT YET RECRUITING

Research Site

London, Ontario, N6A 5A5, Canada

NOT YET RECRUITING

Research Site

Montreal, Quebec, H4A 3S5, Canada

RECRUITING

Research Site

Québec, Quebec, G1V 4T3, Canada

RECRUITING

Research Site

Sherbrooke, Quebec, J1H 5N4, Canada

NOT YET RECRUITING

Research Site

Aalborg, DK9000, Denmark

NOT YET RECRUITING

Research Site

Aarhus N, 8200, Denmark

RECRUITING

Research Site

Hvidovre, 2650, Denmark

RECRUITING

Research Site

København Ø, 2100, Denmark

RECRUITING

Research Site

Odense C, 5000, Denmark

RECRUITING

Research Site

Lyon, 69317, France

RECRUITING

Research Site

Montpellier, 34295, France

NOT YET RECRUITING

Research Site

Nantes, 44093, France

RECRUITING

Research Site

Nîmes, 30029, France

RECRUITING

Research Site

Paris, 75014, France

RECRUITING

Research Site

Paris, 75475, France

RECRUITING

Research Site

Tours, 37044, France

RECRUITING

Research Site

Augsburg, 86156, Germany

NOT YET RECRUITING

Research Site

Berlin, 13353, Germany

RECRUITING

Research Site

Cologne, 50937, Germany

RECRUITING

Research Site

Frankfurt, 60590, Germany

RECRUITING

Research Site

Hamburg, 20246, Germany

RECRUITING

Research Site

Jena, 07747, Germany

NOT YET RECRUITING

Research Site

Leipzig, 04103, Germany

RECRUITING

Research Site

München, 81675, Germany

RECRUITING

Research Site

Athens, 11527, Greece

NOT YET RECRUITING

Research Site

Athens, 12462, Greece

NOT YET RECRUITING

Research Site

Heraklion, 71500, Greece

NOT YET RECRUITING

Research Site

Ioannina, 45500, Greece

NOT YET RECRUITING

Research Site

Thessaloniki, 57010, Greece

RECRUITING

Research Site

Budapest, 1082, Hungary

RECRUITING

Research Site

Debrecen, 4031, Hungary

RECRUITING

Research Site

Eger, 3300, Hungary

RECRUITING

Research Site

Kistarcsa, 2143, Hungary

RECRUITING

Research Site

Pécs, 7624, Hungary

RECRUITING

Research Site

Modena, 41124, Italy

NOT YET RECRUITING

Research Site

Naples, 80131, Italy

NOT YET RECRUITING

Research Site

Palermo, 90127, Italy

RECRUITING

Research Site

Pisa, 56124, Italy

RECRUITING

Research Site

Roma, 00161, Italy

WITHDRAWN

Research Site

Varese, 21100, Italy

NOT YET RECRUITING

Research Site

Kochi, 780-8522, Japan

RECRUITING

Research Site

Kumamoto, 861-8520, Japan

RECRUITING

Research Site

Meguro-ku, 153-0051, Japan

RECRUITING

Research Site

Nagasaki, 852-8501, Japan

RECRUITING

Research Site

Shimonoseki-shi, 750-8520, Japan

RECRUITING

Research Site

Yaizu-shi, 425-8505, Japan

RECRUITING

Research Site

Lublin, 20-081, Poland

WITHDRAWN

Research Site

Warsaw, 04-141, Poland

WITHDRAWN

Research Site

Alicante, 03010, Spain

RECRUITING

Research Site

Badalona, 08916, Spain

RECRUITING

Research Site

Madrid, 28007, Spain

RECRUITING

Research Site

Madrid, 28034, Spain

NOT YET RECRUITING

Research Site

Madrid, 28040, Spain

RECRUITING

Research Site

Madrid, 28046, Spain

RECRUITING

Research Site

Majadahonda, 28220, Spain

RECRUITING

Research Site

Seville, 41009, Spain

RECRUITING

Research Site

Helsingborg, 25187, Sweden

WITHDRAWN

Research Site

Lund, 22185, Sweden

NOT YET RECRUITING

Research Site

Malmö, 20502, Sweden

NOT YET RECRUITING

Research Site

Västerås, 72189, Sweden

RECRUITING

Research Site

Birmingham, B15 2TH, United Kingdom

RECRUITING

Research Site

Cambridge, CB2 0QQ, United Kingdom

RECRUITING

MeSH Terms

Conditions

Clostridium Infections

Condition Hierarchy (Ancestors)

Gram-Positive Bacterial InfectionsBacterial InfectionsBacterial Infections and MycosesInfections

Central Study Contacts

AstraZeneca Clinical Study Information Center

CONTACT

Study Design

Study Type
interventional
Phase
phase 2
Allocation
RANDOMIZED
Masking
QUADRUPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
Double-blind: Participant, Care Provider, Investigator, Outcomes Assessor
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
INDUSTRY
Responsible Party
SPONSOR

Study Record Dates

First Submitted

November 20, 2025

First Posted

December 16, 2025

Study Start

December 10, 2025

Primary Completion (Estimated)

April 20, 2027

Study Completion (Estimated)

January 18, 2028

Last Updated

May 5, 2026

Record last verified: 2026-05

Data Sharing

IPD Sharing
Will share

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal Vivli.org. All requests will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure. Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

Shared Documents
STUDY PROTOCOL, SAP
Time Frame
AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA PhRMA Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.
Access Criteria
When a request has been approved AstraZeneca will provide access to the anonymized individual patient-level data via secure research environment Vivli.org. Signed Data Usage Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information.
More information

Locations