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Understanding Bacteria: Causes, Prevention, and Antibiotic Resistance

Learn about the causes of bacterial diseases, how antibiotics work, and the rise of antibiotic resistance. Discover ways to prevent bacterial infections.

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Understanding Bacteria: Causes, Prevention, and Antibiotic Resistance

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  1. KEY CONCEPT Understanding bacteria is necessary to prevent and treat disease.

  2. Some bacteria cause disease. • Bacteria cause disease by invading tissues or making toxins. • A toxin is a poison released by an organism. Staphylococcus aureus

  3. may colonize new tissues • Normally harmless bacteria can become destructive.

  4. Normally harmless bacteria can become destructive. • immune system may be lowered

  5. 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.

  6. 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. Bacteria can evolve resistance to antibiotics. • Bacteria are gaining resistance to antibiotics. • overuse • underuse • misuse • Antibiotics must be used properly.

  7. Evolutionary Arms Race segment

  8. SuperBugs • Video • Video 2 • website

  9. 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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