Phage therapy takes on superbug UTIs in new trial
NCT ID NCT05488340
First seen Jun 26, 2026 · Last updated Sep 15, 2026 · Updated 3 times
Summary
This study tests a new treatment called LBP-EC01, which uses specially designed viruses (bacteriophages) to attack drug-resistant E. coli bacteria that cause urinary tract infections (UTIs). About 318 adults with a history of UTIs and a current infection will receive either LBP-EC01 plus an antibiotic or a placebo plus the antibiotic. The goal is to see if adding the phages helps clear the infection and symptoms better than the antibiotic alone.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- LBP-EC01 (a cocktail of viruses that attack bacteria, called bacteriophages) plus an antibiotic (trimethoprim/sulfamethoxazole)
- What this could lead to
- If it works, this could offer a new treatment option for people with hard-to-treat urinary tract infections caused by drug-resistant E. coli bacteria.
- What could go wrong
- This is a phase 2 trial, so it's still early. The treatment may not work better than antibiotics alone, and there could be side effects or immune reactions to the phages.
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.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 318 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2022
- Expected to finish
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Dec 2027
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 75 years
- Sex
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Female participants only
- Healthy volunteers
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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 Hide 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: * History of UTI in the past 12 months and prior or current uUTI caused by AMR E. coli (as single pathogen or part of polymicrobial infection where E. coli is the predominant pathogen). Please note that the current infection can be used to meet the requirement of AMR E. coli documentation. * Able to supply a mid-stream, clean catch urine sample for microbiological analysis. * Active acute uUTI infection defined by: a. Evidence of pyuria: i. \>10 white blood cell (WBC)/mL3 on microscopic evaluation of spun, clean, mid-stream urine specimen or \>3 WBC/high power field on unspun clean, mid-stream urine specimen, AND/OR ii. Dipstick analysis of a clean, mid-stream urine specimen positive for leukocytes, AND b. At least 2 of the following signs or symptoms of UTI: dysuria, urinary frequency, urinary urgency, or suprapubic pain * Willing to comply with all aspects of study design including study restrictions, blood, urine, and stool sampling, and scheduled study visits. * All sexually active female patients of childbearing potential must use highly effective contraception during the study and until 2 weeks after the last dose of study drug treatment. * Agrees to STOP continuous low dose antimicrobial prophylaxis and/or will maintain the same practices for post-coital antimicrobial prophylaxis to prevent UTI, as during the prior 12-months, for the entire study duration (throughout the 6-month follow-up period or study discharge). * Agrees to not use any prescription or non-prescription medication for the microbiological or symptomatic treatment of the presenting acute uUTI for the first 10 days of the study. * Capable of providing their own signed informed consent form (ICF) prior to any study-related procedures being performed. * If participating in Part 1 of the study, agrees to fast for ≥2 h prior to first dose of study drug on Day 1/Visit 1 except for drinking 240 mL of water with study drug administration. Exclusion Criteria: * Signs or symptoms of systemic illness such as fever greater than 38° Centigrade/ Celsius, shaking chills, or other clinical manifestations suggestive of complicated UTI. * Treatment with other antibacterial drugs including those that are effective for treatment of the acute uUTI or prevention of recurrent UTI in the 5 days prior to Screening unless the recovered pathogen demonstrates resistance to the initial antibiotic and clinical symptoms persist. In postmenopausal women vaginal estrogen replacement therapy is permitted so long as patient meets all other eligibility criteria, that the dose and regimen has be stable for \> 3 months from Screening (D1/V1), and that there is no planned change to therapy through the 6-month follow-up period or study discontinuation. * Clinical symptoms for more than 5 days before Screening. * Presence of indwelling urinary bladder catheters, urinary tract anatomical abnormalities that increase UTI risk or lead to a post void residual (PVR) urine volume \> 150mL, poorly controlled diabetes mellitus (diagnosed but is not being treated/managed by a physician's care or HbA1c \>8), current symptomatic or larger than 5mm renal calculi, or advanced renal dysfunction (determined by eGFR \< 45 mL/min/1.73 m2). Patients with vaginal prolapse beyond the hymen with Valsalva (e.g., when coughing). * Individuals considered to be immunocompromised. * Clinically significant serious unstable physical illness that in the investigator's opinion prevents patient from completing the study or prevents interpretation or resolution of clinical symptoms. * Pregnant or nursing women. * Exposure to any investigational drugs or other phage therapy 30 days prior to Screening (D1/V1) or prior to participation in this study. Patients who participate in Part 1 are not eligible for participation in Part 2. * Allergies to excipients of the study drug or antibiotics. * History of autonomic dysreflexia. * History of intravenous (IV) drug abuse or is currently using or has positive results for drugs of abuse at screening. * Patients who reside in a long-term care facility. * Suspected or confirmed acute coronavirus disease 2019 (COVID-19) or recent COVID-19 infection with ongoing symptoms.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
12 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Research Site 102
RECRUITINGDoral, Florida, 33166, United States
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Research Site 103
RECRUITINGMiami, Florida, 33176, United States
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Research Site 118
COMPLETEDWinston-Salem, North Carolina, 27157, United States
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Research Site 120
COMPLETEDBoston, Massachusetts, 02115, United States
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Research Site 123
RECRUITINGLos Angeles, California, 90027, United States
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Research Site 125
COMPLETEDMontebello, California, 90640, United States
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Research Site 126
RECRUITINGTustin, California, 92780, United States
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Research Site 131
RECRUITINGLancaster, California, 93534, United States
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Research Site 137
RECRUITINGSan Diego, California, 92037, United States
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Research Site 138
COMPLETEDFresno, California, 93710, United States
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Research Site 140
COMPLETEDJensen Beach, Florida, 34957, United States
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Research Site 145
RECRUITINGRaleigh, North Carolina, 27708, United States
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Research Site 149
RECRUITINGMiami, Florida, 33176, United States
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Research Site 151
RECRUITINGHialeah, Florida, 33013, United States
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Research Site 152
RECRUITINGMurrieta, California, 92563, United States
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Research Site 153
RECRUITINGOcala, Florida, 34473, United States
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Research Site 154
RECRUITINGSt Louis, Missouri, 63141, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Gut bacteria transplant tested against Antibiotic-Resistant urinary infections
- Why do some complicated UTIs resist treatment? massive study aims to find out
- Could removing catheters sooner after kidney transplant cut infections?
- Can better school toilets and peer support boost girls' health and grades? a madagascar trial aims to find out.
- Antibiotic levels in breast milk under the microscope
- Can antibiotic wash and suction stop Post-Surgery infections?