Control of microorganisms

• What are the types of microbial control?

  • physical
  • chemical
  • chemotherapuetic - chemicals promoting health
• ”cidal”

  Kills growth
• “Static”

  slows growth
• sterilization 


  destroying all forms of life
• disinfection

  removes pathogens, on living tissue its called an antiseptic
• aseptic


  conditions without contaminating microbes
• septic

  conditions with contaminating microbes
• sanitize

  reducing microbe population on and in an object
• degerm


  removing microbes from surface (washing hands)
• What determines the effectiveness of antimicrobial measures?

  1. microbe population
  2. environmental factors
  3. time of exposure
  4. Concentration of control measure
  5. microbial characteristics (gram + or -)
• More susceptible to more resistant.

  1. Enveloped virus
  2. Gram positive
  3. nonenveloped bacteria
  4. fungi
  5. gram negative
  6. protozoa trophozoites
  7. fungal spores
  8. protozoa cyst
  9. mycobacteria
  10. bacterial endospores
  11. Prions