Pathogen

• Bacteria

  Single cell organisms characterised by shape
• Virus

  Infectious agents, too small to see with light microscope

  • depend on living cells (host) for reproduction; not alive: cant replicate own genetic material
  • Either DNA or RNA -> surrounded with protein coat
• immunity

  Ability to resist and overcome infection and disease
• Disease

  Any condition which impairs or has potential to impair normal functioning of an organism or part of it
• COmmunicable Disease

  Transmissible infection disease
• pathogen?

  Disease causing agent/organism
• Vector

  Immediate host carrying pathogen
• Contact

  Either direct contact with infected person or indirect contact with something they touched.

  eg) fluid-like lesions- million copies of pathogen and itchy-> prompt scratching; allow spread to new host upon touch

  eg) indirect: beddings, towels, coins
• characteristics of bacteria?

  single cell

  microscopic

  lack organelles

  cell wall of sugar and AA

  variable shapes