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KEY CONCEPT Understanding bacteria is necessary to prevent and treat disease.
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Some bacteria cause disease.
Bacteria cause disease by invading tissues or making toxins. A toxin is a poison released by an organism. Staphylococcus aureus
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Normally harmless bacteria can become destructive.
may colonize new tissues
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Normally harmless bacteria can become destructive.
immune system may be lowered
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Antibiotics are used to fight bacterial disease.
Antibiotics may stop bacterial cell wall formation. Antibiotics do not work on viruses. Prevention is best method to fight bacterial disease.
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Bacteria can evolve resistance to antibiotics.
Bacteria are gaining resistance to antibiotics. A bacterium carries genes for antibiotic resistance on a plasmid. A copy of the plasmid is transferred through conjugation. Resistance is quickly spread through many bacteria. overuse underuse misuse Antibiotics must be used properly.
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Evolutionary Arms Race segment
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SuperBugs Video Video 2 website
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Exit Ticked What are two ways in which bacteria cause disease? How can antibiotics stop bacterial infection? What is antibiotic resistance, and how does it occur?
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