Clinical trial Recruiting at 13 sites Phase 4 Interventional Ages 18 and up

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

PhasePhase 4
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment2096 (estimated)
SponsorIntermountain Health Care, Inc.
Academic / other
Locations13 sites (Brighton, Colorado and 12 other locations)
StatusRecruiting
StartedFebruary 1, 2026
Main results expectedJanuary 2029
Study endsJanuary 2029
Registry record updatedSeptember 25, 2026
Trial IDNCT07376889 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

  • 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
  • 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

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • 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.

    Recruiting at 3 sites Phase 4 McGill University Health Centre/Research Institute of the McGill University Health Centre · St. John's, Newfoundland and Labrador and 2 other locations · NCT06650501

  • 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.

    Recruiting at 20 sites Phase 4 McGill University Health Centre/Research Institute of the McGill University Health Centre · Blacktown, New South Wales and 19 other locations · NCT06637332

  • 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.

    Recruiting at 126 sites Phase 4 University of Melbourne · Houston, Texas and 160 other locations · NCT05137119

  • 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.

    Recruiting at 8 sites Phase 2 McGill University Health Centre/Research Institute of the McGill University Health Centre · Calgary, Alberta and 7 other locations · NCT04886284

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.