How does the N-Light™ Salmonella Risk test work?

How does the N-Light™ Salmonella Risk test work?

The test combines two core technologies: NEMIS bacteriophages (selective enrichment) and AquaSpark™, an ultrasensitive chemiluminescent molecule that reacts with the alpha-D-galactosidase enzyme produced by almost all Salmonella spp. and some other Enterobacteriaceae. In practice, the user follows a simple protocol:

  • Collect the sample using a swab.
  • Transfer it to the enrichment tube.
  • Break and leave the swab inside the tube.
  • Add the antibiotic tablet.
  • Incubate it for 24 hours.
  • Release the AquaSpark™ tablet into the tube.
  • Incubate the activated tube at 37 ˚C for 3-4 minutes
  • Measure results

If there is a risk of having Salmonella spp. that have grown in the selective broth, bacteria will initiate a reaction that generates light which the Luminometer measures, thus yielding a presumptive positive result.

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