Pankaj, presumably you mean differential media as used in biological and medical tests? Specialized media can be selective; formulated to grow only certain microbes while inhibiting ​the growth of others. Have questions or comments? The indicators can be either eosin y, neutral red, phenol red or methylene blue. Differential media allow the characterization of several microorganisms based on the growth patterns of them. “Neisseria gonorrhoeae 01” (Public Domain) via Commons Wikimedia, Lakna, a graduate in Molecular Biology & Biochemistry, is a Molecular Biologist and has a broad and keen interest in the discovery of nature related things, Difference Between Selective and Differential Media, What are the Similarities Between Selective and Differential Media, What is the Difference Between Selective and Differential Media, What is the Difference Between E coli and Salmonella. SELECTIVE MEDIA. The selective and differential aspects are due to the medium containing crystal violet, bile salts, lactose and the pH indicator Neutral Red. Some specialized media are both selective and differential, others are either or. A complex medium in which the exact amounts of components and Examples of selective media include: Thayer Martin Agar used to recover Neisseria gonorrhoeae contains antibiotics; vancomycin, colistin and nystatin. 3. 1. Hektoen enteric agar (HE) which is selective for Gram-negative bacteria. these media. “Trichophyton tonsurans on Dermatophyte Selective Agar” By Nathan Reading from Halesowen, UK – Trichophyton tonsurans on Dermatophyte Selective Agar (CC BY 2.0) via Commons Wikimedia 2. Some examples of selective media include: Differential media or indicator media distinguish one microorganism type from another growing on the same media. Differential Media: Differential media use unique growth patterns of microorganisms to differentiate them from others. Differential media are used to identify and differentiate microorganisms from a closely-related group with the help of unique growth patterns. Two types of media with similar implying names but very different functions, referred to as selective and differential media, are defined as follows. What is the Difference Between Selective and Differential Media      – Comparison of Key Differences, Key Terms: Antibiotic Resistance, Biochemical Characteristics, Differential Media, Indicators, Marker, Microorganisms, Selective Media. Differential Media: Differential media refer to a type of growth media that allows the differentiation of closely-related microorganisms. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Differential media is also known as indicator media. Selective media refer to a type of growth media that allows the growth of selected microorganisms in the medium. Often, in a clinical setting, the most helpful type of medium is one that is both selective and differential. Two types of media with similar implying names but very different functions, referred to as selective and differential media, are defined as follows. Differential media takes advantage of biochemical properties of target organisms, often leading to a visible change when growth of target organisms are present. Specific nutrients or indicators are used in the differential media. The main difference between selective and differential media is their role in the identification of microorganisms. Selective media allows the selection of a group of organisms but not others.Examples are: McConkey Agar, Blood Agar, Mannitol Salt Agar, and EMB. Mannitol salt agar (MSA) which is selective for Gram-positive bacteria and differential for mannitol. Eosin methylene blue selects for Gram-negative organisms. Usually it is an undefined medium made from meat, plant, or yeast extracts. Selective Media: Selective media are used to isolate a particular strain of microorganisms. Examples of differential media include: The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Missed the LibreFest? Selective media are used for the growth of only selected microorganisms. Eosin methylene blue (EMB) that contains methylene blue – toxic to Gram-positive bacteria, allowing only the growth of Gram negative bacteria. (OpenStax CNX, 2018) Selective media are formulated with inhibitors such as antibiotics or high NaCl concentration. EMB agar, Mannitol Salt agar, MacConkey agar, and Phenylethyl Alcohol (PEA) are examples of selective media. While differential media is used in order to differentiate between closely related organisms.Examples are: McConkey, Blood, and EMB Agars. What is Selective Media       – Definition, Role, Examples 2. 1. Selective media are used for the growth of only selected microorganisms. The biochemical characteristics of a microorganism are used in the differentiation and identification of the microorganism among other microorganisms. They remain solid, as very few bacteria are able to decompose agar (the exception being some species in the genera: Cytophaga, Flavobacterium, Bacillus, Pseudomonas, and Alcaligenes). Bacteria grown in li… Selective medium. MacConkey (MCK), which is differential for lactose fermentationmannitol salt agar (MSA), which is differential for mannitol fermentation. On these media are used in the medium » Science » Biology » Microbiology » Difference between selective differential! 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