Vancomycin-resistant Staphylococcus aureus
Antibiotica resistant bacteria / From Wikipedia, the free encyclopedia
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Vancomycin-resistant Staphylococcus aureus (VRSA) are strains of Staphylococcus aureus that have acquired resistance to the glycopeptide antibiotic vancomycin.[3] Bacteria can acquire resistant genes either by random mutation or through the transfer of DNA from one bacterium to another. Resistance genes interfere with the normal antibiotic function and allow bacteria to grow in the presence of the antibiotic.[4] Resistance in VRSA is conferred by the plasmid-mediated vanA gene and operon.[5] Although VRSA infections are uncommon, VRSA is often resistant to other types of antibiotics and a potential threat to public health because treatment options are limited.[6] VRSA is resistant to many of the standard drugs used to treat S. aureus infections. Furthermore, resistance can be transferred from one bacterium to another.[5]
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Vancomycin-resistant Staphylococcus aureus | |
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Scanning electron micrograph (SEM) shows a strain of Staphylococcus aureus bacteria taken from a vancomycin-intermediate Staphylococcus aureus (VISA) culture. | |
Specialty | Microbiology |
Diagnostic method | Disk diffusion[1] |
Treatment | Beta-lactam antibiotic (in combination)[2] |