A blood culture is a lab test to look for microorganisms or other bacteria in a blood example. The website where blood will be drawn is first cleansed with a disinfectant such as chlorhexidine. This minimizes the chance of a microorganism from the skin entering the blood example and creating a false-positive outcome. A gram stain might be done. A gram discolor is a method of determining germs utilizing a special collection of discolorations.
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