MMG 301 Study Guide - Final Guide: Campylobacter Jejuni, Mycobacterium Leprae, Streptococcal Pharyngitis
16 Jul 2019
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Document Summary
A culture medium in which the exact chemical composition is not known. In clinical and public health microbiology, it is frequently necessary to detect the presence of specific microorganisms associated with disease or poor sanitation. A culture medium designed to suppress the growth of unwanted microorganisms and encourage the growth of desired ones. For example, bismuth sulfite agar is one medium used to isolate the typhoid bacterium, the gram-negative salmonella typhi from feces. A solid culture medium that makes it easier to distinguish colonies of the desired organism. Streptococcus pyogenes (p - j"en- z), the bacterium that causes strep throat, show a clear ring around their colonies where they have lysed the surrounding blood cells. Many clinical laboratories have special carbon dioxide incubators in which to grow aerobic bacteria that require concentrations of co2 higher or lower than that found in the atmosphere.
