How would you describe the appearance of bacterial colonies?
How would you describe the appearance of bacterial colonies?
Bacterial colonies are frequently shiny and smooth in appearance. Other surface descriptions might be: veined, rough, dull, wrinkled (or shriveled), glistening.
What is the morphology of a bacterial colony?
Colony morphology is the visual culture characteristics of a bacterial colony on an agar plate. Observing colony morphology is an important skill used in the microbiology laboratory to identify microorganisms.
What are the characteristics by which bacterial colonies may be distinguished?
The bacterial colonies can be distinguished by their form and they may be circular, filamentous, irregular or rhizoid. Also they can be distinguished by elevation and may be raised, convex, flat, umbunate, or crateriform.
How would you describe a colony in microbiology?
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.
How does the appearance of bacterial colonies produced by different bacteria vary?
Different types of bacteria will produce different-looking colonies, some colonies may be coloured, some colonies are circular in shape, and others are irregular. Size – the diameter of the colony. Tiny colonies are referred to as punctiform. Elevation – this describes the side view of a colony.
What do bacteria look like?
Bacteria come in five basic shapes: spherical, cylindrical, comma-shaped, corkscrew and spiral. The scientific names for these shapes are cocci (round), bacilli (cylindrical), vibrios (comma-shaped), spirochaetes (corkscrew) and spirilla (spiral).
What is the appearance of a bacterial colony?
Appearance of colony on the surface: The bacterial colonies are frequently shiny/ smooth in appearance. Colonies may be veined, rough, dull, wrinkled, or glistening. Texture of the colony: Texture means consistency of the bacterial growth.
What is colony morphology in microbiology?
Each species of bacteria produces a colony that looks different from the colonies produced by other species of bacteria. Examination of the form and structure of bacterial colonies is termed colony morphology and is one of the first steps in characterizing and identifying a bacterial culture.
What are the characteristics of a motile bacterial colony?
Colonies that are irregular in shape and/or have irregular margins are likely to be motile organisms. Highly motile organism swarmed over the culture media. Such as Proteus spp. Size of the bacterial colony: The size of the colony can be a useful characteristic for identification.
How does the mucoid strain adapt to its environment?
The mucoid strain has adapted to a new environment and is often multi-drug resistant (MDRO). This occurs by expression of the pel and psl genes, which code for the adhesins pilin and flagellin, aiding in the stickiness and swarming motility of this bacterium.
