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8 Cards in this Set
- Front
- Back
What is this white clearing (halo) marked as #1, around the cells called?
(Lab Exercise 8-Bacterial Capsules) |
Capsule
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What is the rod shaped structure inside the halo(#2) called?
(Lab Exercise 8-Bacterial Capsules) |
Bacterium----Vegetative Cell
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What are the functions of the region labeled as #1?
(Lab Exercise 8-Bacterial Capsules) |
Protection, Nutrition, Adherence
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What type of staining does the structure labeled as #1 show?
(Lab Exercise 8-Bacterial Capsules) |
Negative Staining
Why???? |
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What is a capsule? What important role does it play?
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Capsule-round, thick, and firmly attached coating of bacteria
FUNCTION: (1) Capsular coating BLOCKS the mechanisms that phagocytes (WBC) use to attach to and engulf them. (2) they escape phagocytosis and can survive longer in the host and cause disease (***VIRULENCE FACTOR) |
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What is a slime layer?
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Slime Layer-a loose shield around bacteria
FUNCTION: (1) PROTECTS bacteria from dehydration (2) LOSS OF NUTRIENTS |
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What is the chemical nature of capsules? What are they made of?
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Capsules are made of polysaccharides.
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When staining an encapsulated bacteria what structure are you staining?
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You're staining the polysaccharide capsule
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