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    Blood Culture

    Blood Culture

    A blood culture is a test on a sample of blood to check for bacteria, a fungus, or sometimes viruses in the bloodstream. The test may be done if a doctor suspects a blood infection. A blood culture may help determine the specific organism causing an infection and select the appropriate antibiotic to treat it.

    Usually a blood culture is needed only if a person is severely ill. Blood cultures are commonly done when a person has a high fever or shaking chills that mean there may be an infection of the blood.

    It usually takes between 1 and 3 days to get the results of a blood culture. But a blood culture to look for a fungus or virus can take weeks.

    Last Revised: August 6, 2012

    Author: Healthwise Staff

    Medical Review: E. Gregory Thompson, MD - Internal Medicine & Joseph O'Donnell, MD - Hematology, Oncology

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