<P> Staphylococcus aureus is a Gram - positive , round - shaped bacterium that is a member of the Firmicutes , and it is a member of the normal flora of the body , frequently found in the nose , respiratory tract , and on the skin . It is often positive for catalase and nitrate reduction and is a facultative anaerobe that can grow without the need for oxygen . Although S. aureus is not always pathogenic ( and can commonly be found existing as a commensal ) , it is a common cause of skin infections including abscesses , respiratory infections such as sinusitis , and food poisoning . Pathogenic strains often promote infections by producing virulence factors such as potent protein toxins , and the expression of a cell - surface protein that binds and inactivates antibodies . The emergence of antibiotic - resistant strains of S. aureus such as methicillin - resistant S. aureus ( MRSA ) is a worldwide problem in clinical medicine . Despite much research and development , no vaccine for S. aureus has been approved . </P>
<P> Staphylococcus aureus is a Gram - positive , round - shaped bacterium that is a member of the Firmicutes , and it is a member of the normal flora of the body , frequently found in the nose , respiratory tract , and on the skin . It is often positive for catalase and nitrate reduction and is a facultative anaerobe that can grow without the need for oxygen . Although S. aureus is not always pathogenic ( and can commonly be found existing as a commensal ) , it is a common cause of skin infections including abscesses , respiratory infections such as sinusitis , and food poisoning . Pathogenic strains often promote infections by producing virulence factors such as potent protein toxins , and the expression of a cell - surface protein that binds and inactivates antibodies . The emergence of antibiotic - resistant strains of S. aureus such as methicillin - resistant S. aureus ( MRSA ) is a worldwide problem in clinical medicine . Despite much research and development , no vaccine for S. aureus has been approved . </P>
where is staphylococcus aureus found in the world
where is staphylococcus aureus found in the world
a member of the normal flora of the body , frequently found in the nose , respiratory tract , and on the skin
a member of the normal flora of the body , frequently found in the nose , respiratory tract , and on the skin