Selective media are the culture media designed for the growth of a selected organism while inhibiting the growth of other microorganisms. For example, if a microorganism is resistant to a certain antibiotic, such as ampicillin or tetracycline, then that antibiotic can be added to the medium in order to prevent other cells, which do not possess the resistance, from growing. The resources below are used to supplement an actual 16week college cell biology course. Selective and differential media flashcards quizlet. We show how to distinguish different bacteria based on. Bacteria may be identified by studying the colony character, b mixed. The main difference between selective and differential media is that selective media are used to isolate a particular strain of microorganisms whereas differential media are used to identify and differentiate a closelyrelated group of microorganisms. Selective media are used for the growth of only selected microorganisms. Differential media are the culture media designed to distinguish microorganisms from one another by visible growth characteristics. Chapter 3 methods of culturing microorganisms five basic techniques. Blood agar bap is another type of differential medium. Enriched, selective, and differential media youtube.
Selective media allows for the growth of specific organisms, while differential media is used to distinguish one organism from another. Mannitol salt agar is a selective media, and macconkey agar is a. Identify and describe culture media for the growth of bacteria, including examples of allpurpose media, enriched, selective, differential, defined, and enrichment. Mac is a selective differential media selecting for gram bacteria, then differentiating between lactose fermentation and no fermenting organism. A selective and differential medium for enteric gram. Selective media for different microorganisms labmonk. Use of selective and differential media for bacterial. Selective media allow certain types of organisms to grow, and inhibit the.
Selective media are purposively used for isolation and identification of some particular kind of microorganisms, because such media allow some specific types of microorganisms to grow and inhibit others. Selective and differential media is extremely useful when examining mixed bacterial cultures since it provides. Selective media use specific growth characteristics of a microorganism to selectively grow that microorganism in the growth medium. Start studying selective and differential media microbiology. This video part 1 of 2 describes inoculation of six different selective and differential agars with different bacterial species. Selective media allow certain types of organisms to grow, and inhibit. Selective and differential medium for the primary isolation of. Selective and differential media biology libretexts. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Selective and differential media are used to isolate or identify particular organisms. An example of a selective medium is macconkey agar. It is not selective, and will grow many different types of microbes. Selective growth media for differentiation and detection. It will display a color change in the presence of bacteria that can lyse break down the red blood cells in the medium.
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