Microbiology research. Close-up of a microbiologist handling a petri dish. The petri dishes contain nutrient media that will be used to culture microbes. Culturing and studying such samples allows bacterial and fungal diseases to be diagnosed and treated. The nutrient media here are: MacConkey Agar [red], Hektoen Enteric Agar [green], and Brilliant Green Agar (Modified) [orange]. Photographed at the Centre for Infections of the UK's Health Protection Agency.
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