Search results
onlinelibrary.wiley.com
- A colony is defined as a visible mass of microorganisms originating from a single cell. Colonies are described based on their shape, size, pigmentation, texture, and other properties. Key characteristics include the colony's form, elevation, margin, size, color, surface appearance, odor, opacity, and consistency.
www.slideshare.net › slideshow › colony-morphology-and-characteristics-of-culture
Jan 19, 2021 · The document describes colony morphology and the characteristics used to identify bacterial cultures. A colony is defined as a visible mass of microorganisms originating from a single cell. Colonies are described based on their shape, size, pigmentation, texture, and other properties.
People also ask
What is a colony in microbiology?
What is a bacterial colony morphology?
Why is colony morphology important?
What is colony morphology?
This document discusses various characteristics used to describe microbial colonies, including colony appearance, elevation, margins, optical density, color, and odor.
Feb 6, 2024 · 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.
A colony is defined as a visible mass of microorganisms all originating from a single mother cell. Each bacteria has a special colony morphology on solid media. The commonly observed colonial characteristics are helpful in making a preliminary bacterial identification.
- 794KB
- 17
- Colony Shape
- Size of The Bacterial Colony
- Appearance of The Colony Surface
- Consistency/Texture
- Color of The Colonies
- The Opacity of The Bacterial Colony
- Some Important Terminologies
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. These four forms represent the most common colony shapes you are likely to encounter. 1. circular, 2. irregular, 3. filamentous, and 4. rhizoid Elevation of the bacterial colony:It gives information about how...
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. Tiny colonies are also referred to as punctiform(pin-point). Colonies larger than about 5 mm are likely to be motile organisms. Pu...
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. Bacillus species give dry, wrinkled colonies. Pseudomonas stutzerialso gives similar-appearing wrinkled colonies.
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).
Some bacteria produce pigment when they grow in the medium, e.g., green pigment produces by Pseudomonas aeruginosa, buff-colored colonies of Mycobacterium tuberculosis in L.J medium, and red-colored colonies of Serratia marcescens.
The opacity of a bacterial colony can be described as transparent (clear), opaque (not transparent or clear), translucent (almost clear, but distorted vision–like looking through frosted glass), or iridescent (changing colors in reflected light). A pinpoint translucent β-hemolytic colonies on blood agar is most probably a Streptococcus species. Sta...
Draughtsman colonies Young colonies of Streptococcus pneumoniae (pneumococci)have raised centers, but as the culture ages, they become flattened, with a depressed central part and raised edges giving them a ringed appearance also known as ‘draughtsman colonies’. References 1. Forbes, S., Sahm, D. F., & Weissfeld, A. S. (2002). Bailey & Scott’s Diag...
By the end of this laboratory period you will be able to: Differentiate between colony morphology and cell morphology, and describe the colony morphology of bacteria grown on a solid surface. Prepare a bacterial smear for staining. Perform a simple stain, and explain why they are useful.
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.
