Researchers offered new method for rapid detection of infection in wounds

February 9, 2016  21:38

A new method for detection of infection in wounds could take physicians less than a minute to complete, rather than the current 24 hours it takes to plate bacteria and leave it to incubate overnight, according to research by the George Washington University's (GW) Victoria Shanmugam, M.D.

Shanmugam and co-authors Edgar Goluch, Ph.D., DiPietro Assistant Professor of Chemical Engineering at Northeastern University College of Engineering, and Agnes Chan, Ph.D., assistant professor at the J. Craig Venter Institute, published this new method in the journal Wound Repair and Regeneration. The method uses an electrochemical detection strategy to identify molecules produced by the bacteria Pseudomonas, which commonly infects chronic wounds.

The team tested the use of an inexpensive, disposable electrochemical sensor that immediately reveals bacteria based on the detection of pyocyanin, a bacterial quorum sensing molecule produced by Pseudomonas. The probe correctly identified the presence of the bacterium 71 percent of the time and correctly identified absence of the bacterium 57 percent of the time.

After further enhancement and testing, probes harnessing this methodology could potentially provide a way for physicians to detect wound infections at the bedside, allowing physicians to switch from broad-spectrum antibiotics to specific directed therapies sooner, lowering health care costs, minimizing drug resistance, and improving patient care outcomes.

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