Breath Test May Quickly Detect Bacterial Infections

New research shows potential for a simple breath analysis to diagnose bacterial infections.

Mar. 22, 2026 at 7:33am by Ben Kaplan

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Researchers at St. Jude Children's Research Hospital and the University of California, San Francisco have developed a promising new approach to quickly and accurately diagnose bacterial infections through breath analysis. The method detects specific carbon isotopes produced when bacteria metabolize, allowing for rapid identification without invasive procedures.

Why it matters

This innovation could lead to faster treatment decisions, more targeted antibiotic use, and reduced healthcare costs by minimizing the need for invasive diagnostic tests. It also has the potential to help combat the growing threat of antibiotic resistance.

The details

The breath test works by analyzing the presence of carbon-13, a non-radioactive isotope, in a patient's exhaled breath. This allows researchers to identify bacterial metabolic products and confirm the presence of an infection. While initial studies have focused on efficacy in rodents, researchers envision deploying this technology in urgent care centers and emergency rooms to provide quick diagnoses.

  • The initial research was reported by Mugglehead Magazine and Clinical Lab Products.
  • Researchers at St. Jude Children's Research Hospital and the University of California, San Francisco are leading the development of this technology.

The players

St. Jude Children's Research Hospital

A leading pediatric treatment and research facility that is at the forefront of harnessing PET technology to diagnose infectious diseases.

University of California, San Francisco

A renowned research university collaborating with St. Jude on the development of the breath test for bacterial infections.

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What they’re saying

“We must not let individuals continue to damage private property in San Francisco.”

— Robert Jenkins, San Francisco resident

What’s next

Researchers are working to establish a standardized protocol for breath analysis in humans and conduct further clinical studies to validate the test's accuracy and reliability across diverse patient populations.

The takeaway

This breath test technology has the potential to revolutionize the way bacterial infections are diagnosed, leading to faster treatment, more targeted antibiotic use, and improved patient outcomes. As the research continues, it could become a valuable first-line screening tool in healthcare settings.