What are the identification characteristics for colony morphology?

What are the identification characteristics for colony morphology?

Observing colony morphology is an important skill used in the microbiology laboratory to identify microorganisms. Colonies need to be well isolated from other colonies to observe the characteristic shape, size, color, surface appearance, and texture. Another important characteristic of a bacterial colony is hemolysis.

What are the 3 characteristics of bacterial colonies?

Colony Characteristics

• Form – The form refers to the shape of the colony.
• Elevation – This describes the “side view” of a colony.
• Margin – The margin or edge of a colony (or any growth) may be an important characteristic in identifying an organism.

What are the characteristics by which bacterial colonies may be distinguished?

Bacterial colonies can be distinguished by these many characteristics. 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.

What is morphological characteristics of bacteria?

Morphological Characteristics  The major morphological characteristics of bacteria include: (1) size (2) shape (3)structure and (4) arrangement of bacterial cells.  The basic shapes that occur are: (1) spherical (2) rodlike and (3) helical.

What is the purpose of a streak plate?

The purpose of the streak plate is to obtain isolated colonies from an inoculum by creating areas of increasing dilution on a single plate. Isolated colonies represent a clone of cells, being derived from a single precursor cell.

What is the morphology of your bacteria?

The term morphology comes from the Greek for form and means the form and structure of living organisms. The morphology of bacteria describes the external appearance of bacterial cells including shape, arrangement, and size.

How are you going to describe the morphology of a bacteria?

1. Bacteria are complex and highly variable microbes. They come in four basic shapes: spherical (cocci), rod-shaped (bacilli), arc-shaped (vibrio), and spiral (spirochete) (Figure 1.3(A)).

What factors are used in colony morphology?

Colony morphological characteristics may be viewed with the naked eye, a hand lens, a stereo (dissecting) microscope, or a colony counter (Fig. 2.3). The seven basic categories include colony size, shape, margin (edge), surface, elevation, texture, and optical properties (Fig. 2.4).

What characteristics does a good streak plate have?

Tips for the best results

• Use only a small amount of inoculum.
• Streak lightly so that you do not gouge the agar.
• Flame the loop after you streak each quadrant.
• Make sure the surface of the plate is free of droplets of condensed moisture.

How do you describe a streak plate?

An unglazed piece of porcelain, such as a tile, used to test the characteristic streak of minerals by rubbing the mineral across the tile. Streak plates have a hardness of about 6.5 on the Mohs scale and cannot be used for testing harder minerals.

What are morphological characteristics of bacteria?

What is the main objective of the streak plate?

What is associated with morphological characteristics of bacteria?

Cell shape, nature of multicell aggregates, motility, formation of spores, and reaction to the Gram stain are important. Those morphological features, including the shape and colour of bacterial colonies, are not always constant and can be influenced by environmental conditions.