Clostridium Difficile Infection RecurrencePhase 4BEZLONCT03880539
Bezlotoxumab (BEZLO) In Addition To Standard Of Care (SOC) Vancomycin For The Treatment of Multi-Recurrent Clostridium Difficile Infection
A Phase 4 study testing bezlotoxumab and Vancomycin Oral in people with Clostridium Difficile Infection Recurrence, run by University of Kansas Medical Center at 1 site in United States.
Trial summary
This is a research study to collect information from people that have Clostridium difficile infection (CDI) and are treated with a standard antibiotic treatment in which the antibiotic dose is gradually reduced over 6 weeks and bezlotoxumab (BEZLO), an approved monoclonal antibody targeting C. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Clostridium Difficile Infection Recurrence
- What is being tested?
- bezlotoxumab and Vancomycin Oral
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 4 participants
- Where
- 1 siteUnited States
- Study dates
- 25 Jun 2019to 18 Nov 2021
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- i) age 18 years or older;
- ii) diagnosis of multi-recurrent CDI, defined as passage of 3 or more loose stools in 24 hours or less for at least 2 consecutive days and a positive stool test for toxigenic C. difficile (nucleic acid amplification test [NAAT] and toxin enzyme immunoassay [EIA] positive), with 2 or more confirmed prior CDI episodes;
- iii) receiving or planning to receive a 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen for at least 4 weeks;
- iv) patient highly unlikely to become pregnant due to being female and not of reproductive potential or female of reproductive potential agreeing to be abstinent or using 2 acceptable methods of birth control starting at enrollment and through the 16-week study period; and
- v) patient or legal representative voluntarily agreeing to participate by providing written informed consent after the nature of the study has been fully explained.
- i) age 18 years or older
- ii) diagnosis of multi-recurrent CDI
- iii) received 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen.
Who cannot join
- i) active chronic diarrheal illness, such as (but not limited to) ulcerative colitis or Crohn's disease or with a condition such that they routinely pass loose stool
- ii) planned surgery for CDI within 24 hours
- iii) positive pregnancy test in the 48 hours before the infusion or unwilling to undergo pregnancy testing if a pre-menopausal female who is not sterilized and therefore has the potential to bear a child
- iv) breastfeeding or planning to breastfeed prior to the completion of the study period
- v) previous receipt of BEZLO
- vi) receipt of immune globulin within 6 months prior to enrollment or planning to receive immune globulin prior to completion of the 16-week study period
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- vii) receipt of non-SOC CDI therapy within 14 days prior to enrollment
- viii) planned treatment with SOC therapy for longer than 6 weeks
- ix) receipt of medications to control diarrhea such as loperamide, diphenoxylate hydrochloride/atropine sulfate at any time prior to completion of the 16-week study period
- x) medical history of decompensated congestive heart failure
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Kansas Medical Center
Kansas City, Kansas, 66160
About this study
Official title: Historically-controlled Clinical Trial of the Efficacy and Safety of Bezlotoxumab (BEZLO) in Addition to Standard of Care (SOC) Vancomycin for the Treatment of Multi-recurrent Clostridium Difficile Infection (CDI)
This is a research study to collect information from people that have Clostridium difficile infection (CDI) and are treated with a standard antibiotic treatment in which the antibiotic dose is gradually reduced over 6 weeks and bezlotoxumab (BEZLO), an approved monoclonal antibody targeting C. difficile toxin, which has shown to reduce CID recurrence when used in combination with standard antibiotic treatment.
Read the detailed description
Clostridium difficile (C. diff) is a type of bacteria which causes diarrhea in some people who receive antibiotics for other infections. The current antibiotics used to treat C diff infection (CDI) are usually successful in treating the initial episode of CDI, but may not prevent recurrent infection. To prevent recurrent CDI, standard oral antibiotic treatment with vancomycin is extended by gradually reducing the dose over 4-8 weeks. This is called antibiotic taper. Bezlotoxumab (BEZLO), a monoclonal antibody targeting C. difficile toxin B, is an approved medication that has also been shown to reduce CDI recurrence in patients receiving antibacterial drug treatment of CDI. In this study, approximately 12 people with multi-recurrent CDI will be treated with BEZLO in combination with standard oral tapered vancomycin. Study participation will last 16 weeks. The rate of CDI recurrence in this group will be compared to information collected from approximately 72 historical patients with multi-recurrent CDI treated with oral tapered vancomycin only.
- Being tested
- bezlotoxumab, Vancomycin Oral
- Keywords
- C.diff, Clostridium Difficile, recurrence, Bezlotoxumab, CDI
- Medical subject headings
- Recurrence
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
bezlotoxumabDrug
Also called Zinplava
Adding BEZLO to SOC oral VAN pulse/taper
Vancomycin OralDrug
Also called Firvanq
SOC vancomycin pulse/taper
| Study group | Role | What they receive |
|---|---|---|
| BEZLO + SOC taper | Other | Single arm of patients treated with BEZLO + SOC oral VAN pulse/taper. Receives: Drug: bezlotoxumab; Drug: Vancomycin Oral |
What is being measured
The primary outcome is the main question the study is designed to answer.
Rate of CDI reoccurrence at 12 weeks
If diarrhea resolves (defined as <2 loose stools per day for at least 2 consecutive days) and subsequently begins again (3 or more loose stools in 24 hours or less for at least 2 consecutive days), this will represent a new episode of diarrhea. If there is a new episode of diarrhea at any time during the 12-week study period, an unscheduled visit will be conducted. A stool sample will be provided for any new episode of diarrhea which occurs and a stool test for toxigenic C. difficile (NAAT plus EIA) will be performed. CDI reoccurrence will be defined as new episode of diarrhea and positive stool test for toxigenic C. difficile (NAAT plus EIA).
Measured: 12 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Mar 2019
- Study start25 Jun 2019
- Primary completion18 Nov 2021
- Study completion18 Nov 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Clostridium Difficile Infection RecurrenceStudies of the same condition, open and under way.
- More trials run by University of Kansas Medical CenterThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- The intervention group will consist of a single arm of patients treated with BEZLO + SOC oral VAN pulse/taper for multi-recurrent CDI, with a planned enrollment of 12 patients. To achieve the aim of the proposed study, we will compare the efficacy of BEZLO + SOC oral VAN pulse/taper to a historical cohort of patients treated with SOC oral VAN pulse/taper only. These patients will be matched 1:6 on criteria previously outlined in this proposal (BEZLO + SOC, n=12; SOC comparator, n=72; total number of patients in study, n=84).
- Masking
- None (open label)
- Enrolment
- 4 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Kansas Medical Center
- Sponsor type
- University, hospital or other
- Collaborators
- Merck Sharp & Dohme LLC
- Responsible party
- Principal investigator, Lisa Clough, University of Kansas Medical Center
- Investigators
- Lisa A Clough, MD, Principal investigator, University of Kansas Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03880539
- Sponsor's protocol ID
- Study00143405
- Acronym
- BEZLO
- Status last verified
- May 2022
- First submitted
- 11 Mar 2019
- Last updated
- 26 May 2022
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 May 2022. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Historically-controlled Clinical Trial of the Efficacy and Safety of Bezlotoxumab (BEZLO) in Addition to Standard of Care (SOC) Vancomycin for the Treatment of Multi-recurrent Clostridium Difficile Infection (CDI)
- ClinicalTrials.gov ID
- NCT03880539
- Acronym / sponsor ID
- BEZLO / Study00143405
- Keywords
- C.diff, Clostridium Difficile, recurrence, Bezlotoxumab, CDI
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 4 participants (actual)
- Lead sponsor
- University of Kansas Medical CenterUniversity, hospital or other
- Collaborators
- Merck Sharp & Dohme LLC
- Study start
- 25 Jun 2019 (actual)
- Primary completion
- 18 Nov 2021 (actual)
- Study completion
- 18 Nov 2021 (actual)
- First posted
- 19 Mar 2019 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a research study to collect information from people that have Clostridium difficile infection (CDI) and are treated with a standard antibiotic treatment in which the antibiotic dose is gradually reduced over 6 weeks and bezlotoxumab (BEZLO), an approved monoclonal antibody targeting C. difficile toxin, which has shown to reduce CID recurrence when used in combination with standard antibiotic treatment.
Detailed description
Clostridium difficile (C. diff) is a type of bacteria which causes diarrhea in some people who receive antibiotics for other infections. The current antibiotics used to treat C diff infection (CDI) are usually successful in treating the initial episode of CDI, but may not prevent recurrent infection. To prevent recurrent CDI, standard oral antibiotic treatment with vancomycin is extended by gradually reducing the dose over 4-8 weeks. This is called antibiotic taper. Bezlotoxumab (BEZLO), a monoclonal antibody targeting C. difficile toxin B, is an approved medication that has also been shown to reduce CDI recurrence in patients receiving antibacterial drug treatment of CDI. In this study, approximately 12 people with multi-recurrent CDI will be treated with BEZLO in combination with standard oral tapered vancomycin. Study participation will last 16 weeks. The rate of CDI recurrence in this group will be compared to information collected from approximately 72 historical patients with multi-recurrent CDI treated with oral tapered vancomycin only.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- The intervention group will consist of a single arm of patients treated with BEZLO + SOC oral VAN pulse/taper for multi-recurrent CDI, with a planned enrollment of 12 patients. To achieve the aim of the proposed study, we will compare the efficacy of BEZLO + SOC oral VAN pulse/taper to a historical cohort of patients treated with SOC oral VAN pulse/taper only. These patients will be matched 1:6 on criteria previously outlined in this proposal (BEZLO + SOC, n=12; SOC comparator, n=72; total number of patients in study, n=84).
| Arm | Type | Receives |
|---|---|---|
| BEZLO + SOC taper | Other | Drug: bezlotoxumab, Drug: Vancomycin OralSingle arm of patients treated with BEZLO + SOC oral VAN pulse/taper. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (8 listed)
- i) age 18 years or older;
- ii) diagnosis of multi-recurrent CDI, defined as passage of 3 or more loose stools in 24 hours or less for at least 2 consecutive days and a positive stool test for toxigenic C. difficile (nucleic acid amplification test [NAAT] and toxin enzyme immunoassay [EIA] positive), with 2 or more confirmed prior CDI episodes;
- iii) receiving or planning to receive a 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen for at least 4 weeks;
- iv) patient highly unlikely to become pregnant due to being female and not of reproductive potential or female of reproductive potential agreeing to be abstinent or using 2 acceptable methods of birth control starting at enrollment and through the 16-week study period; and
- v) patient or legal representative voluntarily agreeing to participate by providing written informed consent after the nature of the study has been fully explained.
Key exclusion criteria (10 listed)
- i) active chronic diarrheal illness, such as (but not limited to) ulcerative colitis or Crohn's disease or with a condition such that they routinely pass loose stool
- ii) planned surgery for CDI within 24 hours
- iii) positive pregnancy test in the 48 hours before the infusion or unwilling to undergo pregnancy testing if a pre-menopausal female who is not sterilized and therefore has the potential to bear a child
- iv) breastfeeding or planning to breastfeed prior to the completion of the study period
- v) previous receipt of BEZLO
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| bezlotoxumabAlso: ZinplavaAdding BEZLO to SOC oral VAN pulse/taper | Drug | BEZLO + SOC taper |
| Vancomycin OralAlso: FirvanqSOC vancomycin pulse/taper | Drug | BEZLO + SOC taper |
Primary outcome
Rate of CDI reoccurrence at 12 weeks
Time frame: 12 weeks
If diarrhea resolves (defined as <2 loose stools per day for at least 2 consecutive days) and subsequently begins again (3 or more loose stools in 24 hours or less for at least 2 consecutive days), this will represent a new episode of diarrhea. If there is a new episode of diarrhea at any time during the 12-week study period, an unscheduled visit will be conducted. A stool sample will be provided for any new episode of diarrhea which occurs and a stool test for toxigenic C. difficile (NAAT plus EIA) will be performed. CDI reoccurrence will be defined as new episode of diarrhea and positive stool test for toxigenic C. difficile (NAAT plus EIA).
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 May 2022.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Lisa A Clough, MD principal investigator
University of Kansas Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing bezlotoxumab and Vancomycin Oral in people with Clostridium Difficile Infection Recurrence, run by University of Kansas Medical Center at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 26 May 2022. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Rate of CDI reoccurrence at 12 weeks (time frame: 12 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 May 2022; AzTrials last refreshed its copy on 8 Nov 2026.