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Colony morphology The term “ colony morphology ” refers to the visible characteristics of a colony. However.

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Presentation on theme: "Colony morphology The term “ colony morphology ” refers to the visible characteristics of a colony. However."— Presentation transcript:

1 Colony morphology The term “ colony morphology ” refers to the visible characteristics of a colony However , colony morphology is not a reliable way to identify bacteria , because as many different types of bacteria have similar colony morphology.

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5 Colony Morphology Size: Colony shape: Margin (edge): Elevation: Texture: Color:

6 The size of the colony can be a useful characteristic for identification. The diameter of a representative colony may be measured in millimeters . Tiny colonies are referred to as punctiform.

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8 filamentous

9 filamentous

10 rhizoid

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13 Margin – The margin or edge of a colony may be an important characteristic in identifying an organism. .(entire , filiform , curled … )

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15 Undulate

16 lobate

17 lobate

18 Errose

19 Elevation – This describes the “side view” of a colony
Elevation – This describes the “side view” of a colony. These are the most common.(convex , raised , flat …)

20 Umbonate

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23 Extreme Example of Crateriform

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25 aspergillas

26 texture – ­several terms that may be appropriate for describing the texture or consistency of bacterial growth are ( dry , moist , mucoid , brittle ,viscous (sticks to loop hard to get off))

27 Smooth Mucoid

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29 A shiny, smooth, and/or mucoid appearance tends to be associated with the presence of capsular material.

30 Color – It is important to describe the color or pigment of the colony
Color – It is important to describe the color or pigment of the colony. Also include descriptive terms for any other relevant optical characteristics such as : opaque , cloudy , translucent , iridescent .

31 iridescent

32 Opaque and translucent


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