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Staph stoppers
Date:12/20/2013

University of Iowa researchers have developed a new vaccine that protects against lethal pneumonia caused by Staphylococcus aureus (staph) bacteria, including drug-resistant strains like MRSA.

The research team was led by Patrick Schlievert, professor and chair of microbiology in the UI Carver College of Medicine. The findings are published this week in the Journal of Infectious Disease.

The new vaccine targets toxins that are made and secreted by staph bacteria. Earlier work by Schlievert's team found these toxins are responsible for the serious, sometimes deadly, symptoms produced by staph infections, including high fever, low blood pressure, and toxic shock. The researchers believed a vaccine that blocked the action of these toxins might prevent the serious illness caused by the bacteria.

Using an animal model that closely resembles human staph infection, the researchers showed that vaccination against three staph toxins provided almost complete protection against staph infections. The vaccinated animals were protected from disease even when they were infected with very high doses of bacteria. Furthermore, not only did the vaccine protect the animals from dying, but seven days after vaccination there were no disease-causing bacteria remaining in the animals' lungs.

"Our study suggests that vaccination against these toxins may provide protection against all strains of staph," Schlievert says. "If we can translate this finding into an effective vaccine for people it could potentially prevent millions of cases of serious and milder skin and soft tissue infections yearly."

The team also found that passive immunizationusing serum from vaccinated animals to immunize other animalswas successful. This finding suggests that antibodies induced by the vaccination are the protective factor.

According to the Centers for Disease Control and Prevention, Staphylococcus aureus bacteria are the most si
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Contact: Richard Lewis
richard-c-lewis@uiowa.edu
319-384-0012
University of Iowa
Source:Eurekalert

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