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Pathogens

Pathogens. Aims: Must be able to define the term pathogen and state the different forms. Should be able to describe the main features of the different forms of pathogen. Could be able to give examples of each pathogen form and outline how they affect humans. Pathogens.

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Pathogens

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  1. Pathogens • Aims: • Must be able to define the term pathogen and state the different forms. • Should be able to describe the main features of the different forms of pathogen. • Could be able to give examples of each pathogen form and outline how they affect humans.

  2. Pathogens • Pathogens are microbes that cause diseases when they live in other organisms. • Pathogens can cause the following effects: • Destroy cells • Produce toxins (poisons) • Interfere with normal function • Excessive immune response • There are several main forms of pathogen:

  3. Prion • Tiny protein particles. • No nucleic acids.

  4. virus • Sub-microscopic molecules. • Have protein coats surrounding an RNA or DNA core . • Only capable of growth and replication inside cells.

  5. Bacteria • Microscopic unicellular organisms.

  6. Fungi • Single or multicellular organisms. • Produce spores and obtain food directly by absorption. • Sometimes classified as plants without chlorophyll.

  7. Viroid • Plant pathogens. • Consist of short strands of circular RNA. • No protein coat.

  8. protozoa • Single-celled parasites that resemble animals and may form large colonies.

  9. Activity • Complete the disease sheet using information in chapter 7.

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