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Cards In This Set
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What is the effect of UV radiation on bacterial growth?
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UV light has a bacteriocidal effect
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How does UV radiation kill cells?
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UV light damages DNA. The thymine nucleotides dimerize.
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How does time affect the bacteriocidal effect of the UV light?
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More time under UV light, the more damage occurs to DNA
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How does distance from UV source affect the bacteriocidal effect of the UV light?
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As distance increases, the UV light is less effective. As distance decreases the UV light is more effective.
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How does shielding affect the bacteriocidal effect of the UV light?
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UV light cannot pass through glass, plastic, liquid or solid media. This limits UV light as an antimicrobial agent.
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How can UV be used medically?
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UV can be used to kill microbes that it is in direct contact with.
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Bacteriocidal means?
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Bacterial cells are killed on a surface, object, or media
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Bacteriostatic means?
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Bacterial proliferation or growth is inhibited. Cannot be used on surgical instruments.
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What are bacteriostatic and bacteriocidal substances considered?
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Antimicrobial
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Types of antimicrobial substances are...
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Chemical and biological
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What are chemical antimicrobials
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Disinfectants, antiseptics
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What are biological antimicribials
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Antibiotics
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Disinfectants are what?
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Chemical agents that can be used on inanimate objects and surfaces.
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Antiseptics are
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Antimicriobial chemical agents that can be safely used on living tissue w/o causing harm.
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Carbolic acid is also known as
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Phenol
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