Communicable Diseases

• Pathogens are microorganisms that enter the body and cause disease
• Bacteria make you feel ill by producing the toxins that damage your cells and tissues
• Viruses live inside cells and replicate themselves using the cells' machinery. The cells then burst and then release new viruses. This damage makes you feel ill
• All protists are eukaryotes, but not all eukaryotes are protists
• Some fungi are single-celled. Others have a body which is made of hyphae.
• These hyhae can grow and penetrate human skin and the surface of plants. They can also produce spores, which can spread to other plants and animals
• Pathogen transportation

  • Water - drinking or bathing in dirty water
  • Air - pathogens can be breathed in
  • Droplets - Airborne pathogens carried when you cough or sneeze
  • Direct contact - Touching contaminated surfaces