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Beating superbugs with a high-tech cleanser
Date:12/9/2011

According to the World Health Organization, antibiotic-resistant bacteria are one of the top three threats to human health. Patients in hospitals are especially at risk, with almost 100,000 deaths due to infection every year in the U.S. alone.

Now Dr. Udi Qimron of the Department of Clinical Microbiology and Immunology at Tel Aviv University's Sackler Faculty of Medicine has developed an efficient and cost-effective liquid solution that can help fight antibiotic-resistant bacteria and keep more patients safe from life-threatening infections. The solution is based on specially designed bacteriophages viruses that infect bacteria that can alter the genetic make-up of antibiotic-resistant bacteria. "We have genetically engineered the bacteriophages so that once they infect the bacteria, they transfer a dominant gene that confers renewed sensitivity to certain antibiotics," explains Dr. Qimron.

The solution, recently detailed in the journal Applied and Environmental Microbiology, could be added to common antibacterial cleansers used on hospital surfaces, turning resistant bacteria into sensitive bacteria. It's easy to prepare, easy to apply, and non-toxic, Dr. Qimron notes. He estimates that one liter of the growth medium the liquid in which the bacteriophages are grown will cost just a few dollars.

The research was done in collaboration with Ph.D. student Nir Friedman, lab technician Shahar Mor, and Dr. Rotem Edgar of the Ichilov Medical Center.

Changing bacteria's genetics

Certain antibiotics are designed to target and bind to a part of the bacteria cell called a ribosome the protein factory of the cell. But after continual and frequent exposure to antibiotics, the bacteria "learn" to change components in the ribosome itself so that the antibiotics are unable to bind.

Dr. Qimron and his colleagues set out to determine whether they could make resistant bacteria sensitive to antibiotics ag
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Contact: George Hunka
ghunka@aftau.org
212-742-9070
American Friends of Tel Aviv University
Source:Eurekalert

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