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Streptococcus viridans
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Streptococcus viridans

bacterium

Learn about this topic in these articles:

infectious agents

  • The routine monitoring of blood pressure levels is an important part of assessing an individual's health. Blood pressure provides information about the amount of blood in circulation and about heart function and thus is an important indicator of disease.
    In human disease: Infectious agents

    Streptococcus viridans bacteria, for example, are found in the throats of more than 90 percent of healthy persons. In this area they are not considered pathogenic. The same organism cultured from the bloodstream, however, is highly pathogenic and usually indicates the presence of the disease…

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subacute bacterial endocarditis

  • T cell infected with HIV
    In immune system disorder: Type III hypersensitivity

    The infectious agent is often Streptococcus viridans, normally a harmless inhabitant of the mouth. The bacteria in the heart become covered with a layer of fibrin, which protects them from destruction by granulocytes, while they continue to release antigens into the circulation. These can combine with preformed antibodies to form…

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