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Bacteria
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One cell microorganisms
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The two general classifications of bacteria
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Nonpathogenic and pathogenic
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Nonpathogenic bacteria
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Non disease producing, can be beneficial, 70% of bacteria, many live on the skin
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Pathogenic bacteria
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Disease producing, live everywhere, spread easily, 3 basic shapes,produce toxins
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Cocci
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Round shaped cells that appear in groups or singularly
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Staphylococci
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Found in boils, pus forming, bunches
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Streptococci
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Causes strep,pus forming, long chain
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Diplococci
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Causes pneumonia, pairs
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Bacilli
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Rod, most common
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Spirilla
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Spiral, causes syphilis, Lyme disease, cholera
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Growth of bacteria
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Active and inactive
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Active
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Reproduces and grows rapidly, require dark, damp, dirty, spaces with food, absorb food, grow and divide
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Inactive
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Conditions unfavorable, they die or become inactive, some form spores only destroyed by sterilization or sporicidal, if conditions are good they can activate again
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How does cocci travel
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Via air and dust movements
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How do bacilli and spirilla travel
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Use figella and cillia to propel themselves through liquids
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