Antibiotic-resistant bacteria can be killed with a laser. It does not harm the person

The effectiveness of antibiotics decreases, so scientists are looking for a replacement. Researchers from Washington

University of St. Louis showed that ultra-short pulses of laser radiation can kill bacteria and viruses without harming human cells.

Growth of drug-resistant superbugsIs a serious health problem. Because of this, according to some studies, up to 10 million people can die by 2050. There are already strains of bacteria that are resistant to all antibiotics used.

The authors of the new work studied how ultra-short pulses of laser radiation can kill viruses and ordinary bacteria, in particular, they were interested in those that are resistant to antibiotics.

The team focused on twospecific types of superbugs: Staphylococcus aureus (MRSA) and Escherichia coli. As a result, laser pulses killed more than 99.9% of the microbe. According to the authors, lasers excite protein structures within viruses and bacteria, causing molecular bonds to break.

Also, laser pulses do not harm human cells - they must be several orders of magnitude more powerful in order to pose a real threat.

Their approach will be used to disinfect biological products in vitro and even treat bloodstream infections, the researchers said.

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