UNIT 4-Lab Notes 9.Bacteria Identification through Functional Media-Motility Testing.pdf

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UNIT 3-Lab Notes 9.Bacteria Identification through Functional Media-Motility Testing FUNCTIONAL MEDIA Functional media→ often used to determine the identity of unknown microbes, and come in several forms. Selective media→ contain agent(s) that prohibit the growth of some organisms, thus selecting or allowing the growth of other organisms. Helpful when growing mixed cultures containing many different microbes when only one or two specific microbes are of interest. Differential media→ enable many types of microbes to grow; however, differential media contain an indicator that enables differences between microbes to be visualized. In this experiment, you will use differential media to determine motility of two species of bacteria. Enriched media→ supplemented with essential growth factors for organisms that do not grow well on typical media. MOTILITY Motility → self-propelled motion, is present in many but not all bacteria.Determining the presence of motility is important for the classification of microbes. Bacteria move by a

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