Pathogens

• pathogens = a disease-causing microorganism
• microorganisms that can be pathogens: virus, fungi, bacteria and protists
• structure of bacteria

  A) loop of DNA/chromosomes

  B) flagellum

  
• structure of viruses

  A) antigens

  B) protein coat

  C) genetic material DNA/RNA

  
• antigens = the protein on the outside of a pathogen that causes your immune system to respond
• ways that diseases can spread:

  • bodily fluids
  • contaminated food
  • insects
  • contaminated water
  • contact
  • aerosol