Study: New fluorescent light technology detects hidden bacteria in wounds

Editor's Note

Research led by the University of Southern California and published in the journal Advances in Wound Care showed new technology using fluorescent light has proven effective in detecting bacteria missed during standard wound cleaning, US News & World Report August 30 reports. In a review of 26 medical studies, a handheld device using autofluorescence (AF) imaging identified bacteria in nine out of 10 wounds.

Per the outlet, this technology allows real-time visualization of bacteria and offers significant advancement over traditional methods that rely on lab testing of tissue samples, which can take days to yield results. That AF imaging can detect bacteria more timely shows promise in improving targeted wound care as well as reducing the risk of infection and the need for antibiotics by enabling earlier intervention.

Researchers noted that different types of bacteria emitted different colors under the fluorescent light, aiding in their identification. This technology could be particularly beneficial in managing chronic wounds, such as diabetic foot ulcers, where high bacterial loads can slow healing without necessarily causing symptoms.

The technology has limitations, however. It requires controlled lighting conditions to function accurately, which could be challenging in certain clinical settings. Additionally, it does not replace the need for lab tests that provide detailed bacterial identification and antibiotic sensitivity. Some experts also noted fluorescence imaging only detects bacteria that produce fluorescent molecules, and its effectiveness depends on the bacterial load present.