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Related Flashcards
Cards In This Set
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Obligate aerobes
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Require oxygen
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Faculative anaerobes
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Can exist with or without oxygen
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Obligate anaerobes
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Die in presence of oxygen
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Lag phase (of growth curve)
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Organism transfers to new environment-make macro-molecules-binary fission
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Exponential phase (of growth curve)
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Rapid growth, produce primary metabolites (needed for growth)
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Late lag phase (of growth curve)
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Food/resources becoming low, starvation could occur cells beomce more rounded and resistant to chemicals + radiation-cell membrane changes-produce secondary metabolites (enzymes, exoenzyme to kill off other bacteria)
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Stationary phase (of growth curve)
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Balanced phase, resources gone (feed off dead bacteria to survive)
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Death phase (of growth curve)
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More bacteria die than grow, feed off each other, increase of waste products
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Prolong decline phase
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Only if organism is an endospore producer
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Antiseptic
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Disinfectant non-toxic enough to be used on skin, alcohol, iodine, hand sanitizer, baby wipes
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Aseptic technique
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Exclude contaminating microorganisms from an environment
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Bactericidal
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Kills bacteria
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Decontamination
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Decrease disease-causing microbes to level safe to handle
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Degerm
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Decrease # microbes in area
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Disinfectant
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Chemical to destroy microorganisms and virus
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