Intense light pulses can kill 99.999% of food poisoning bugs in just six bursts, say researchers from Strathclyde University today (Wednesday, 06 April 2005) presenting at the Society for General Microbiologys 156th Meeting at Heriot-Watt University, Edinburgh.
The dangerous food poisoning bacteria Listeria monocytogenes can be effectively cleared from contaminated kitchen surfaces, water treatment plants, hospital operating theatres, and even from the air by using pulses of intense ultra-violet light, according to scientists from the Robertson Trust Laboratory for Electronic Sterilisation Technologies (ROLEST), based at the University of Strathclyde in Scotland.
The bursts of UV-rich light last just one millionth of a second each, but six pulses are enough to effectively disinfect an area, killing all but one in every hundred thousand bacteria. The researchers found that the way the bacteria were grown affected their susceptibility to the light pulses, with already stressed bacteria most likely to be killed.
Faye Jones | alfa
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