InfectionPhase 2PROSENCT01112995
A Pilot Trial to Determine the Efficacy of Lactobacillus Rhamnosus for Reducing Colonization by Methicillin-resistant Staphylococcus Aureus (MRSA) (PROSE)
A Phase 2 study testing Lactobacillus rhamnosus in people with Infection, run by University of Wisconsin, Madison at 1 site in United States.
Trial summary
The purpose of this study is to investigate the feasibility, safety and efficacy of oral probiotic, Lactobacillus rhamnosus versus oral placebo for reducing colonization by MRSA. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Infection
- What is being tested?
- Lactobacillus rhamnosus
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 49 participants
- Where
- 1 siteUnited States
- Study dates
- Jan 2010to Mar 2012
- Phase
- Phase 2
- 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
- subjects will be male or female
- 18 years of age or older
- may or may not be hospitalized
- able to take oral medications
- have been found to be colonized with MRSA or at high risk of being colonized by MRSA and are not taking antibiotics
Who cannot join
- people on antibiotics will not be eligible to participate
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Wisconsin Hospital
Madison, Wisconsin, 53792
About this study
Official title: A Pilot Randomized Trial to Determine the Efficacy of a Probiotic, Lactobacillus Rhamnosus for Reducing Colonization by Methicillin-resistant Staphylococcus Aureus (MRSA)
The purpose of this study is to investigate the feasibility, safety and efficacy of oral probiotic, Lactobacillus rhamnosus versus oral placebo for reducing colonization by MRSA.
Read the detailed description
Healthcare-associated infections are an important threat to patient safety. Currently, between 5 and 10 percent of patients admitted to acute care hospitals acquire one or more infections; healthcare-associated infections affect approximately 2 million patients each year in the United States, result in 90,000 deaths, and are associated with an added cost of $4.5 to $5.7 billion per year. Seventy percent of healthcare-associated infections are caused by antimicrobial resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA), resulting in increased antimicrobial usage, morbidity and mortality, making prevention of multiresistant bacteria essential.
Eradication of colonization has been shown to greatly reduce infection; however, there are no reliable means of providing sustained eradication of colonization. No effective means of eradicating MRSA colonization exist.
Probiotics containing strains of lactobacilli represent a novel approach to the prevention and control of antimicrobial resistance and have been studied extensively for a variety of infections. Even though various studies have shown probiotics to be effective for prevention of vaginal infections, urinary tract infections, etc no studies have examined the potential of probiotics to eradicate colonization by resistant pathogens, such as MRSA.
- Conditions
- Infection
- Being tested
- Lactobacillus rhamnosus, Sugar pill (placebo)
- Keywords
- Probiotic, Lactobacillus, Antibiotic resistance
- Medical subject headings
- Infections
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Lactobacillus rhamnosusDietary supplement
Also called Yoplait, Activia
1 pill formulation to be given once a day for 4 weeks
Sugar pill (placebo)Dietary supplement
Also called splenda
placebo identical to the active product will be given
| Study group | Role | What they receive |
|---|---|---|
| Probiotic | Experimental | subjects will be given a pill formulation of a probiotic Lactobacillus rhamnosus to be taken once a day. Receives: Dietary Supplement: Lactobacillus rhamnosus |
| Sugar pill | Placebo comparator | placebo identical to the active product will be given Receives: Dietary Supplement: Sugar pill (placebo) |
What is being measured
The primary outcome is the main question the study is designed to answer.
The main outcomes will be the proportion of patients colonized with MRSA at 4 weeks, 8 weeks, 12 weeks and 24 weeks following start of treatment.
Measured: 24 weeks
Secondary outcomes (1)
Incidence of clinical infections will be assessed in the one year following enrollment into the study
Measured: 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Apr 2010 (estimated)
- Study startJan 2010
- Primary completionMar 2011
- Study completionMar 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for InfectionStudies of the same condition, open and under way.
- More trials run by University of Wisconsin, MadisonThe 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 2
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 49 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Wisconsin, Madison
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Nasia Safdar, MD, Ph.D, Principal investigator, University of Wisconsin Department of Medicine (Infectious Disease)
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01112995
- Sponsor's protocol ID
- 2008-0023
- Acronym
- PROSE
- Status last verified
- Apr 2011
- First submitted
- 27 Apr 2010
- Last updated
- 5 Oct 2015
- Results posted
- No
- Data monitoring committee
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 5 Oct 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Pilot Randomized Trial to Determine the Efficacy of a Probiotic, Lactobacillus Rhamnosus for Reducing Colonization by Methicillin-resistant Staphylococcus Aureus (MRSA)
- ClinicalTrials.gov ID
- NCT01112995
- Acronym / sponsor ID
- PROSE / 2008-0023
- Conditions
- Infection
- Keywords
- Probiotic, Lactobacillus, Antibiotic resistance
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 49 participants (estimated)
- Lead sponsor
- University of Wisconsin, MadisonUniversity, hospital or other
- Study start
- Jan 2010
- Primary completion
- Mar 2011 (actual)
- Study completion
- Mar 2012 (actual)
- First posted
- 29 Apr 2010 (estimated)
- 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.
The purpose of this study is to investigate the feasibility, safety and efficacy of oral probiotic, Lactobacillus rhamnosus versus oral placebo for reducing colonization by MRSA.
Detailed description
Healthcare-associated infections are an important threat to patient safety. Currently, between 5 and 10 percent of patients admitted to acute care hospitals acquire one or more infections; healthcare-associated infections affect approximately 2 million patients each year in the United States, result in 90,000 deaths, and are associated with an added cost of $4.5 to $5.7 billion per year. Seventy percent of healthcare-associated infections are caused by antimicrobial resistant bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA), resulting in increased antimicrobial usage, morbidity and mortality, making prevention of multiresistant bacteria essential.
Eradication of colonization has been shown to greatly reduce infection; however, there are no reliable means of providing sustained eradication of colonization. No effective means of eradicating MRSA colonization exist.
Probiotics containing strains of lactobacilli represent a novel approach to the prevention and control of antimicrobial resistance and have been studied extensively for a variety of infections. Even though various studies have shown probiotics to be effective for prevention of vaginal infections, urinary tract infections, etc no studies have examined the potential of probiotics to eradicate colonization by resistant pathogens, such as MRSA.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Probiotic | Experimental | Dietary Supplement: Lactobacillus rhamnosussubjects will be given a pill formulation of a probiotic Lactobacillus rhamnosus to be taken once a day. |
| Sugar pill | Placebo comparator | Dietary Supplement: Sugar pill (placebo)placebo identical to the active product will be given |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- subjects will be male or female
- 18 years of age or older
- may or may not be hospitalized
- able to take oral medications
- have been found to be colonized with MRSA or at high risk of being colonized by MRSA and are not taking antibiotics
Key exclusion criteria (1 listed)
- people on antibiotics will not be eligible to participate
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 |
|---|---|---|
| Lactobacillus rhamnosusAlso: Yoplait, Activia1 pill formulation to be given once a day for 4 weeks | Dietary supplement | Probiotic |
| Sugar pill (placebo)Also: splendaplacebo identical to the active product will be given | Dietary supplement | Sugar pill |
Primary outcome
The main outcomes will be the proportion of patients colonized with MRSA at 4 weeks, 8 weeks, 12 weeks and 24 weeks following start of treatment.
Time frame: 24 weeks
1 secondary outcome
Incidence of clinical infections will be assessed in the one year following enrollment into the study
Time frame: 1 year
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 5 Oct 2015.
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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.
Nasia Safdar, MD, Ph.D principal investigator
University of Wisconsin Department of Medicine (Infectious Disease)
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Lactobacillus rhamnosus in people with Infection, run by University of Wisconsin, Madison 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 5 inclusion and 1 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 5 Oct 2015. 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. Some participants in this study may receive a placebo. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
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?
The main outcomes will be the proportion of patients colonized with MRSA at 4 weeks, 8 weeks, 12 weeks and 24 weeks following start of treatment. (time frame: 24 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 5 Oct 2015; AzTrials last refreshed its copy on 8 Nov 2026.