CClinicalTrials.gg
TerminatedNCT03937999Updated Nov 9, 2022Results posted

Bezlotoxumab as Secondary Prophylaxis for C. Difficile in High-risk Hospitalized Patients Exposed to Antibiotics.

A Phase 4 interventional study of Bezlotoxumab in Clostridium Difficile, sponsored by Montefiore Medical Center. Terminated at 1 site in United States. Open to participants aged 60 Years and older. Per ClinicalTrials.gov, last updated 2022-11-09.

Sponsored by Montefiore Medical Center · Phase 4, Interventional, and Prevention

Why this study was terminated
Slow enrollment due to COVID19 , change in practice with standardized use of oral vancomycin prophylaxis
Phase
Phase 4
Study type
Interventional
Enrollment
1
Allocation
Non-randomized
Ages
60 Years and older
Sex
All
01

Study summary

This study will examine whether the human monoclonal antibody, bezlotoxumab administered AFTER acute Clostridioides difficile (C.diff) has resolved, but during a period of subsequent antibiotic therapy, will eliminate the high risk of C. diff relapse.

Read the detailed description

Clostridioides difficile (C. diff) is a germ (bacteria) that causes life-threatening diarrhea. It is usually a side-effect of taking antibiotics that affect the normal balance of bacteria in the intestines. When the "good bacteria" in the intestine are killed by antibiotics, the C.diff bacteria begin to grow and produce toxins, causing frequent diarrhea and other symptoms such as abdominal pain or tenderness, loss of appetite, low-grade fever, nausea and vomiting. C. diff can be treated by using special antibiotics, but it tends to come back in about 20% of patients. C-diff is problematic because of frequent relapses after apparent cure. The greatest risk factor for relapse is receipt of subsequent antibiotics, in the hospital, shortly after being treated.

Zinplava™(bezlotoxumab) is an FDA approved human monoclonal antibody designed to prevent the recurrence of C.diff.This is not an antibiotic, as it does not kill C. diff, but is an antibody to C. diff toxins, which stops the damage. When Bezlotoxumab is given during a C. diff infection together with antibiotics to kill C. diff, it decreases the risk that C. diff will come back by about one-half. Bezlotoxumab is approved for use when given during a C. diff infection, but it has not been used to prevent C diff in other situations, such as the one being studied in this research.

02

Conditions studied

  • Clostridium Difficile

Keywords

  • clostridium difficile
  • diarrhea
03

In context

Clostridium Infections

310 studies on the registry are indexed under Clostridium Infections; 50 are open to participants now.

This study's enrollment of 1 is below the median of 65 across 233 interventional studies indexed under Clostridium Infections.

Browse Clostridium Infections studies →

Lead sponsor

Montefiore Medical Center is the lead sponsor of 402 studies on the registry; 70 are open to participants now.

Of its 81 completed or terminated interventional studies of FDA-regulated products, 73 (90%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
60 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • C diff diagnosed within 90 days
  • Receipt of high-risk antibiotics for C diff (e.g. Beta-lactams, carbapenems) in an inpatient setting
  • Age 60 years and older

Exclusion criteria

Exclusion Criteria:

  • Receipt of current C.diff active antibiotics (oral vancomycin, fidaxomycin, metronidazole, tigecycline/ doxycycline, nitazoxanide, rifamycin) within 72hrs.
  • Not Expected to survive 8 weeks
  • Prior or planned fecal microbiota transplant or Bezlotoxumab use
  • Congestive heart failure (a potential risk of Bezlotoxumab)
05

Study design

Phase
Phase 4
Primary purpose
Prevention
Allocation
Non-randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
1 participant (actual)

Study arms

  • Experimental
    Bezlotoxumab Arm

    Single dose of Bezlotoxumab 10mg/kg iv over 60 minutes on Day 0

    Drug: Bezlotoxumab

  • No intervention
    No Bezlotoxumab

    Control group who are eligible as per the inclusion/exclusion criteria to the Bezlotoxumab arm, but not given Bezlotoxumab (Day 0) .

Interventions

  • DrugBezlotoxumab

    Injection: 1,000 mg/40 mL (25 mg/mL) solution in a single-dose vial.

    Also known as: Zinplava

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What researchers measure

Primary outcomes

  1. Recurrence of C.Difficile Infection

    Time frame: within 4 weeks

Secondary outcomes

  1. Recurrence of C.Difficile Infection

    Time frame: within 8 weeks

  2. Rate of Deaths

    Time frame: within 8 weeks

  3. Relapse of C. Difficile by 8 Weeks

    Time frame: 8 weeks

07

Results

Posted Nov 9, 2022

Participant flow

Participant flow — Overall Study
MilestoneBezlotoxumab ArmNo Bezlotoxumab
Started01
Completed01
Not completed00

Outcome measures

PrimaryRecurrence of C.Difficile Infection
Time frame:
within 4 weeks
Reported as:
Count of participants · Participants
Recurrence of C.Difficile Infection
ParticipantsBezlotoxumab ArmNo Bezlotoxumab
Recurrence of C.Difficile Infection—0
SecondaryRecurrence of C.Difficile Infection
Time frame:
within 8 weeks
Reported as:
Count of participants · Participants
Recurrence of C.Difficile Infection
ParticipantsBezlotoxumab ArmNo Bezlotoxumab
Recurrence of C.Difficile Infection—0
SecondaryRate of Deaths
Time frame:
within 8 weeks
Reported as:
Number · percentage of participants
Rate of Deaths
percentage of participantsBezlotoxumab ArmNo Bezlotoxumab
Rate of Deaths—0
SecondaryRelapse of C. Difficile by 8 Weeks
Time frame:
8 weeks
Reported as:
Count of participants · Participants
Relapse of C. Difficile by 8 Weeks
ParticipantsBezlotoxumab ArmNo Bezlotoxumab
Relapse of C. Difficile by 8 Weeks—1

Adverse events

Collected over Participants queried at 1 day, 4 weeks, and 8 weeks. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Bezlotoxumab Arm———
No Bezlotoxumab0/1 (0%)0/1 (0%)0/1 (0%)

Baseline characteristics

Only 1 participant was enrolled in the study (control group). Study terminated early due to lack of enrollment

Age, Categorical
Age, Categorical(Participants)Bezlotoxumab ArmNo BezlotoxumabTotal
<=18 years000
Between 18 and 65 years000
>=65 years011
Sex: Female, Male
Sex: Female, Male(Participants)Bezlotoxumab ArmNo BezlotoxumabTotal
Female011
Male000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Bezlotoxumab ArmNo BezlotoxumabTotal
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American011
White000
More than one race000
Unknown or Not Reported000
Region of Enrollment
Region of Enrollment(Participants)Bezlotoxumab ArmNo BezlotoxumabTotal
United States011
08

Study locations

1 site
  • Montefiore Medical Center
    Bronx, New York 10467, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Jun 23, 2020

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 9, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03937999
Lead sponsor
Montefiore Medical Center
Collaborators
Merck Sharp & Dohme LLC
Responsible party
Sponsor
First posted
May 6, 2019
Start date
Aug 30, 2019
Primary completion
May 15, 2022
Completion
May 15, 2022
Results posted
Nov 9, 2022
Last update
Nov 9, 2022

Study contacts

Paul Riska, MD
principal investigator · Montefiore Medical Center

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is terminated, as verified in Oct 2022. You cannot join it, but the record below documents what was studied.

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