Cefazolin Inoculum Effect in MSSA Bacteremia
Official title: Clinical Impact of the Cefazolin Inoculum Effect
Funded at Methodist Hospital Research Institute · NIH-11404809 · Data updated 2026-11-12
This project tests how cefazolin works in severe MSSA bloodstream infections and whether a rapid test can predict which patients might have worse outcomes.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | Methodist Hospital Research Institute NIH-funded |
| Lab location | 1 site (Houston, United States) |
| Project start | June 5, 2023 |
| Project end | May 31, 2028 |
| Funding year | 2026 |
| Award (this year) | $425,805 |
| NIH project number | 5R01AI173138-04 |
| Project ID | NIH-11404809 on NIH RePORTER |
Who could benefit from this research
✓Could help
Adults and children with MSSA bacteremia, treated in participating hospitals, who could benefit from optimized antibiotic therapy based on CzIE detection.
✕Less likely to help
Patients without MSSA bacteremia or those not receiving cefazolin as part of their therapy may not benefit.
What this research studies
MSSA bacteremia is a serious infection and cefazolin is increasingly used as first-line therapy. The study develops a quick nitrocefin-based test to detect the cefazolin inoculum effect, with the goal of guiding which patients may need adjusted therapy. Researchers plan to compare patient outcomes with and without rapid CzIE detection to see if this approach improves safety and effectiveness. The work involves international collaboration and real-world clinical microbiology settings to translate the test into routine use.
Why it matters
Potential benefit: If successful, patients with MSSA bacteremia could receive more tailored and safer antibiotic choices, potentially improving survival and reducing side effects.
How similar studies have gone: Previous studies support Cefazolin as effective for MSSA infections and suggest CzIE may influence outcomes, but rapid clinical implementation remains unproven.
Where this research is happening
-
Methodist Hospital Research Institute
Houston, United States Active
Researchers
- Principal investigator: Arias, Cesar Augusto — Methodist Hospital Research Institute
- Study coordinator: Arias, Cesar Augusto
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About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.