Bacteria of the Mouth

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(No Transcript)
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Where might you find an anaerobe living?
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Capnophiles
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Why are obligate anaerobes killed by O2?
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Creating environments with reduced/no O2

• Candle jar
• Thioglycolate
• Gas Pak

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Microbial Flora of the Mouth
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Why does sucrose increase risk of cavities?
sucrose
Strep mutans
glucan (glycocalyx)
fructose
S. mutans L. acidophilus A. odontolyticus
biofilm
lactic acid
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Defenseless?
http//www.80s.com/saveferris/scenes/04.html
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Determining susceptibility to cavities

• Snyder test
• pH indicator bromcresol green
• green at/above pH 4.8
• yellow lt pH 4.8