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Fighting Disease

Fighting Disease. Presentation by : M s. Pellicano. Vocabulary. Bacteria: single celled organisms without nucleus Contaminated: unclean, could infect body Infection: disease causing microorganism invades body, multiplies Toxin: poison produced by bacteria that damages cells

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Fighting Disease

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  1. Fighting Disease Presentation by: Ms. Pellicano

  2. Vocabulary • Bacteria: single celled organisms without nucleus • Contaminated: unclean, could infect body • Infection: disease causing microorganism invades body, multiplies • Toxin: poison produced by bacteria that damages cells • Tumor: abnormal growth resulting from uncontrolled division cells

  3. Flu Shot • Getting shot doesn’t mean you won’t get flu • Different strains appear • Could get sick from strain that you’re not vaccinated aganist

  4. Pasteur and Microorganisms • Investigated silkworms • Found microorganisms killed silkworms • Microorganisms cause most infectious diseases

  5. Lister • 1800’s: surgeons operated with dirty instruments, dirty hands • Many died from infection • Hypothesized microorganisms caused infections from surgery • Experiment: washed hands, instruments with carbolic acid • Sprayed patients, used bandages covered in the acid • 15% died compared to 45%

  6. Robert Koch • Specific organisms causes disease • Steps: 1.) id pathogen in blood 2.) inject pathogen into healthy mouse 3.) compare, found same pathogen

  7. Types of pathogens • Bacteria • Viruses • Fungi • Protists • Spread by contact with sick person, living things, objects

  8. Bacteria • One celled • Ear infection • Food poisoning • Tetanus • Strep throat • Produce toxins

  9. Viruses • Reproduce only inside living cells • Damaged, destroyed with new virus particles released • Cold • Flu

  10. Fungi • Molds • Yeasts • One celled • Many celled • Warm, dark, moist areas grow • Athletes foot • ringworm

  11. One celled Malaria: sleeping sickness Hikers disease Protists

  12. Pathogens Spread • Physical contact • Sneezes • Botulism: live in soil • Contaminate food, water • causes cholera, dysentery • Objects • Tetanus: contaminated nail, object punctures skin • Animal bites

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