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Researchers unzip MRSA and discover route for vaccine
Date:1/16/2011

University of Rochester Medical Center orthopaedic scientists are a step closer to developing a vaccine to prevent life-threatening methicillin-resistant staphylococcus aureus (MRSA) infections following bone and joint surgery.

Other MRSA vaccine research has failed to produce a viable option for patients because of the inability to identify an agent that can break through the deadly bacteria's unique armor. Most other research has targeted the surface of the bacteria, but the URMC team discovered an antibody that reaches beyond the microbe's surface and can stop the MRSA bacteria from growing, at least in mice and in cell cultures.

The Orthopaedic Research Society invited URMC researchers to present their findings on Jan. 16, 2011, at the ORS annual meeting in Long Beach, Calif. The team is led by Edward M. Schwarz, Ph.D., professor of Orthopaedics and associate director of the URMC Center for Musculoskeletal Research. John Varrone, a second-year graduate student in Schwarz's lab, will discuss the data at ORS and the ongoing search for attractive molecular candidates for use in a vaccine.

Staph infection is the leading cause of osteomyelitis, a serious bacterial infection of the bone. Up to half of these infections are due to MRSA, a particular strain of staph known as a "superbug" because of its antibiotic resistance. MRSA causes nearly 500,000 hospitalizations and 19,000 deaths a year in the United States. Although improvements in surgical techniques and use of prophylactic antibiotics prevents some MRSA infections, osteomyelitis is expected to remain a serious problem in the future as people live longer and request more joint replacements and reconstructive surgery.

Management of MRSA infections due to bone and joint surgery is very challenging, Schwarz said, and therefore a vaccine to prevent the infection is badly needed.

It is difficult to pin down the source of most post-surgical MRSA infections, but the heal
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Contact: Leslie Orr
Leslie_Orr@urmc.rochester.edu
585-275-5774
University of Rochester Medical Center
Source:Eurekalert

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