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More than 8-log reduction in bacteria tests at ALS UK

In January, we visited the ALS Laboratories in Manchester, UK, to test the effectiveness of our broadband UV technology PureFize on three types of bacteria: Legionella pneumophila, Pseudomonas aeruginosa, and Escherichia coli. Both Legionella and Pseudomonas can spread in water systems causing severe infections in humans. Hospitals and healthcare environments are at particular risk.

The PureFize UV chips were tested in inoculated water in a beaker. A sample of 5 ml was taken from the beaker at defined time intervals. Samples from each time point were then plated onto TSA pour plates with appropriate dilutions and incubated for 72 hours.

The test results were outstanding. For Legionella, PureFize achieved at least an 8-log reduction within 60 seconds. For Pseudomonas, we achieved at least a 7-log reduction within the same time frame. For E. coli, which was tested for comparison, we achieved at least a 7-log reduction within 120 seconds.

About ALS
ALS is the UK’s leading provider of food and drinks testing services and offers a comprehensive range of high-quality analytical testing services, including microbiological and chemical testing services. The company has seven accredited laboratories across the UK and 370 sites worldwide.