Researchers at Perdue University have developed a laser sensor that is capable of detecting salmonella in food samples three times faster than conventional methods.
The system which goes under the name BARDOT, (bacterial rapid detection using optical scatter technology) scans bacteria colonies and generates a distinct ‘fingerprint’ on samples. The system is then able to pinpoint the presence of Salmonella within 24 hours.
Arun Bhunia, professor of food science at Purdue said that the BARDOT system is far more efficient at detecting the potentially fatal pathogen than methods that are currently employed by the food industry.
“BARDOT allows us to detect Salmonella much earlier and more easily than current methods," said Bhunia.
"This could ultimately help provide safer food to consumers."
According to the researchers, current salmonella detection methods can take up to 72 hours to yield results, and often require artificial alteration of the bacteria.
"BARDOT screens quickly and inexpensively," said Atul Singh, postdoctoral research associate and first author of the study. "If you get a positive result for Salmonella, you can do a follow-up test. This can help food processors make more informed decisions."
In addition, Bhunia says that the BARDOT system can detect multiple types of disease-causing bacteria with a single scan including Escherichia coli, Vibrio, Listeria, Bacillus and other foodborne pathogens.
"That's the beauty of this system," Bhunia said. "It's so versatile. It can find organisms that you didn't even think about."
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