Laser System Identifies Salmonella Faster

Feb-22-14 The BARDOT system can identify the Salmonella bacteria on food within 24 hours—a significant reduction in time from the previous requirement of several days—which could help prevent tainted food from reaching consumers.

Developed by a team at Purdue University, the BARDOT (bacterial rapid detection using optical scatter technology) detects the bacterial colonies grown on agar plates by scanning them with a red diode laser. Penetrating a bacterial colony causes the red light to form a unique scatter pattern, which can then be compared to a library of images to identify the bacteria type.

In tests, the BARDOT was able to identify the Salmonella bacteria with a 95.5 percent accuracy, and was able to distinguish eight of the most prevalent Salmonella serovars (variations within a species of bacteria), which makes it easier to trace the bacteria to the contamination source.

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[MEDGADGET.COM]
[PURDUE UNIVERSITY]

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