Sterilisation

Sterilisation

1. Destroying or eliminating pathogens from ...

   • an object
   • food
   • environment

2. Ways of sterilisation

   • Heat treatment
     • Sterilisation and disinfection
     • Boiling
       • Kill most microorganisms except thick-walled spores
         • Milk bottles, metal spoons and forks, surgery equipment
     • Heating
     • Autoclave
       • Autoclave
       • Kill microorganisms and spores using high pressure and high heat.
         • Glassware, culture mediums and surgical tools.
   • Chemical treatment
     • Antiseptic
       • Kills or inhibits microorganisms on the skin or wounds
       • Examples
         • Iodine solution, hydrogen peroxide, ethanol, acriflavine, potassium permanganate solution
     • Disinfectant
       • Examples
         • Iodine solution, chlorine, phenol, copper sulphate and Lysol
       • Sterilises walls, floors, blankets, bedsheets, toilet bowls and medical tools.
   • Radiation treatment
     • Gamma rays
       • Disinfect tools that are sensitive to heat and chemicals..
         • Plastic tools, medications, vaccines, syringes an surgical tools.
     • UV rays
       • Use sunlight to kill microbes on ..
         • mattress, pillows and clothes

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