Combination Antibiotics for Staphylococcus aureus Bacteremia in adults
Official title: COMBAT-SAB: Combination Antibiotic Therapy for Staphylococcus Aureus Bacteremia
Run by Intermountain Health Care, Inc. · NCT07376889 · Data updated 2026-11-12
This study tests whether using two antibiotics together for adults with Staphylococcus aureus in the blood works better than a single antibiotic.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 2096 (estimated) |
| Sponsor | Intermountain Health Care, Inc. Academic / other |
| Locations | 13 sites (Brighton, Colorado and 12 other locations) |
| Status | Recruiting |
| Started | February 1, 2026 |
| Main results expected | January 2029 |
| Study ends | January 2029 |
| Registry record updated | September 25, 2026 |
| Trial ID | NCT07376889 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults (18+ years) hospitalized with a first positive blood culture for MRSA or MSSA who meet high-risk criteria and have no contraindications to the assigned therapy.
✕Probably not a fit
Patients who do not meet high-risk criteria or who have contraindications to combination therapy may not benefit from the CAT approach.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This pragmatic interventional study compares combination antibiotic therapy to monotherapy for adults with Staphylococcus aureus bacteremia in hospital settings. High-risk patients may be randomized to receive either monotherapy or combination therapy, while low-risk patients receive usual care. The trial collects data from all eligible SAB patients at participating hospitals to assess outcomes across groups. It includes both MSSA and MRSA bloodstream infections and uses real-world clinical practice as the framework. Patients are followed during hospitalization to evaluate effectiveness and safety of treatment strategies.
Why it matters
Potential benefit: If successful, early targeted combination therapy could improve outcomes and reduce complications for patients with SAB.
How similar studies have gone: Prior evidence for combination therapy in SAB has been mixed, making this pragmatic, real-world trial an important step to determine potential benefits in routine care.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria:
* Age ≥18 years
* Alive and admitted to an Intermountain Health (IH) hospital acute care unit at enrollment
* Initial positive blood culture with either methicillin-resistant Staphylococcus aureus (MRSA) or methicillin-susceptible Staphylococcus aureus (MSSA), collected:
1. on or during the index admission to an IH hospital, or
2. in an ambulatory setting (laboratory, clinic or emergency department) within 48 hours of the index admission, or
3. at a non-IH network hospital within 24 hours of subsequent transfer to an IH hospital
Exclusion Criteria:
* Patient requests that patient health data not be included in the analysis
Where it's running
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Platte Valley Hospital
Brighton, Colorado, United States Recruiting -
Saint Joseph Hospital
Denver, Colorado, United States Recruiting -
St. Mary's Regional Hospital
Grand Junction, Colorado, United States Recruiting -
Good Samaritan Hospital
Lafayette, Colorado, United States Recruiting -
Lutheran Medical Center
Wheat Ridge, Colorado, United States Recruiting -
St. Vincent Regional Hospital
Billings, Montana, United States Recruiting
Show 7 more locations
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St. James Hospital
Butte, Montana, United States Recruiting -
Holy Rosary Hospital
Miles City, Montana, United States Recruiting -
Intermountain Medical Center
Murray, Utah, United States Recruiting -
McKay-Dee Hospital
Ogden, Utah, United States Recruiting -
Utah Valley Hospital
Provo, Utah, United States Recruiting -
LDS Hospital
Salt Lake City, Utah, United States Recruiting -
St. George Regional Hospital
St. George, Utah, United States Recruiting
Study contacts
- Principal investigator: Brandon J Webb, MD — Intermountain Health Care, Inc.
- Study coordinator: Brandon J Webb, MD
- Email: Brandon.Webb@imail.org
- Phone: 801-507-7781
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Switching to dabigatran versus staying on apixaban/edoxaban/rivaroxaban for S. aureus bloodstream infection
This trial will try whether switching people with S. aureus bloodstream infection who are already taking apixaban, edoxaban, or rivaroxaban to dabigatran leads to better outcomes.
-
Comparing Daptomycin and Vancomycin for MRSA Bloodstream Infections
This study is testing whether daptomycin or vancomycin works better for treating bloodstream infections caused by MRSA in patients.
-
Evaluating treatments for Staphylococcus aureus bloodstream infections
This study is testing different treatments for people with Staphylococcus aureus bloodstream infections to find out which ones work best to help them recover and live longer.
-
Combining two antibiotics to treat Staphylococcus aureus bacteremia
This study is testing if using two antibiotics together can help adults with Staphylococcus aureus bacteremia get better faster than the usual treatment.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.