BIOL41 Lab Exam 2

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Author:
daynuhmay
ID:
181124
Filename:
BIOL41 Lab Exam 2
Updated:
2012-11-01 13:16:18
Tags:
microbiology
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BIOL41 Lab Exam 2
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  1. 3 surfaces in the mouth that microbes like to adhere to
    • 1) teeth
    • 2) tongue
    • 3) gums
  2. how does high fructose corn syrup increase risk of caries?
    • sucrose is broken down into fructose and glucose by Strep mutans
    • fructose is then metabolized into lactic acid
    • glucose is used for glucan and glycocalyx to make biofilms
  3. glucan
    giant glycocalyx
  4. 2 important natural defenses against bacteria in our mouth
    • 1) water in saliva washes bacteria away
    • 2) lysozyme breaks down peptidoglycan
  5. Snyder test
    • differential - turns yellow under 4.8pH
    • selective - favors the growth of oral bacteria with a low medium pH of 4.8
    • glucose added as fermentable carb
    • molten agar is inoculated and cooled/incubated for 72hr
    • yellow: bacteria present make acid - prone to caries

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