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- A colony is defined as a visible mass of microorganisms all originating from a single mother cell, therefore a colony constitutes a clone of bacteria all genetically alike. In the identification of bacteria and fungi much weight is placed on how the organism grows in or on media.
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What is a colony in microbiology?
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A colony is defined as a visible mass of microorganisms all originating from a single mother cell, therefore a colony constitutes a clone of bacteria all genetically alike. In the identification of bacteria and fungi much weight is placed on how the organism grows in or on media.
- Colony shape. It includes the form, elevation, and margin of the bacterial colony. Form of the bacterial colony: The form refers to the shape of the colony.
- Size of the bacterial colony. The size of the colony can be a useful characteristic for identification. The diameter of a representative colony may be measured in millimeters or described in relative terms such as pinpoint, small, medium, and large.
- Appearance of the colony surface. Bacterial colonies are frequently shiny and smooth in appearance. Other surface descriptions might be: dull (opposite of glistening), veined, rough, wrinkled (or shriveled), or glistening.
- Consistency/Texture. Several terms that may be appropriate for describing the texture or consistency of bacterial growth are: dry, moist, viscid (sticks to loop, hard to get off), brittle/friable (dry, breaks apart), mucoid (sticky, mucus-like).
Nov 3, 2020 · An Overview. In microbiology, a “colony” is a group of bacteria, fungi, and other microorganisms grown on a solid agar medium. The cells plated on this medium grow to form a mass, which can then be duplicated for further use in the lab. Colony morphology is used to pick out a pure colony—that is a colony grown from a single parent cell.
Jul 21, 2021 · Definition noun, plural: colonies (biology) Several individual organisms (especially of the same species) living together in close association. (cell culture) A cluster of identical cells (clones) on the surface of (or within) a solid medium, usually derived from a single parent cell, as in bacterial colony. Supplement
Nov 21, 2023 · A bacterial colony is a mass of genetically identical bacterial cells that grow from a single mother cell on a solid medium. Learn how to identify bacterial colonies by their form, margin, elevation, color and other characteristics.
Nov 19, 2011 · Classical microbiology uses both gross and microscopic morphology to identify microbes. Gross morphology includes colony shape, size, and surface features (Fig. 2.1). For example, Bacillus atropheus strain globigii produces an orange-pigmented colony on tryptic soy agar but produces small white colonies on other media. The structures assigned ...
