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See variations in colonial morphology among various species of bacteria. Bacteria grow on solid media as colonies. 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.
Colony morphology can sometimes be useful in bacterial identification. Colonies are described based on size, shape, texture, elevation, pigmentation, and effect on growth medium. Find common criteria that are used to characterize bacterial growth; Colony shape. Size of the bacterial colony. Appearance of the colony surface. Consistency/Texture.
On agar plates, bacteria grow in collections of cells called colonies. Each colony arises from a single bacterium or a few bacteria (CFU). Although individual cells are too small to be viewed with the unaided eye, masses of cells can be observed. Colonies can have different forms, margins, elevations and colors.
Colony morphology. A swab from a bin spread directly onto nutrient agar. Colonies differ in their shape, size, colour and texture. Can you count how many different colony types there are? Use the diagrams on colony morphology to help you interpret your plate. A cough that was aimed directly onto nutrient agar.
A colony (see Fig. \(\PageIndex{1}\)) is a visible mass of microorganisms growing on an agar surface and usually originating from a single organism or arrangement of organisms. Different microorganisms will frequently produce colonies which differ in their morphological appearance (form, elevation, margin, surface, optical characteristics, and ...
Determining the morphology of a single colony growing on the surface of a plate culture can be an important tool in the description and identification of microorganisms.
Nov 19, 2011 · Gross morphology includes colony shape, size, and surface features (Fig. 2.1). For example, Bacillus atropheu s strain globigii produces an orange-pigmented colony on tryptic soy agar but produces small white colonies on other media.
Determining the morphology of a single colony growing on the surface of a plate culture can be an important tool in the description and identification of microorganisms.
Describing Colony Morphology. As we document our discoveries it is absolutely essential that we use common adjectives to describe the physical characteristics of the colonies that our isolates form when cultivated on an agar surface. Below is an illustrated guide to the terms we will use. 1. Culture conditions.
In microbiology, colonial morphology refers to the visual appearance of bacterial or fungal colonies on an agar plate. Examining colonial morphology is the first step in the identification of an unknown microbe.
