M5:Topic 1: Control microbes

• where are control microbes important?

  1. everyday life - personal, indsutry and lab
  2. prevention and treatment
  3. safe products ie. water and food
  4. hospitals
• list the methods for controlling growth

  1. sterilisation
  2. disinfection
  3. antimicrobial agents
  4. actions
  5. sanitation
  6. antisepsis
  7. decontamination
• sterilisation 


  complete decrease of all viable micro-organisms present upon/in article
• disinfection 


  application of chemicals to objects to kill pathogenic
• antimicrobial agents 


  kill and inhibit growth of micro-organ for a specific situtation
• actions


  used to prevent growth of microbes for a purpose
• sanitation 


  public health process of mech/chem cleaning
• antisepsis 


  topical application of chem to tissue = prevent infection
• what are the 3 types of anti-microbial agents

  1. bacteria static: agents inhibit growth, agents don’t kill cells, and viable count and total count = stable
  2. bacteridical: agents can kill microbe, viable count decreases but total count is stable, agents kills cells
  3. bacteriolytic: viable and total count decrease and agent break cells = destroy it
• list the factors influencing effectiveness of control method

  • size of pop
  • exposure time
  • [] of agent, temp and pH
  • nature of mat being treated
  • characteristics of pop
  • interaction/protective features of enviro
  • type of control
• which microbe is most resistant and least resistant

  most: endospore bacteria

  least: viruses with lipid envelopes
• what are the 3 levels of disease control

  1. primary: present measures and surveillance, maintance of good health, nutrient, and hygiene, vaccination
  2. secondary: diagonistic test, screening pros, and early treatement
  3. tertiary: actions stop disease further and prevention of deterioration
• explain public health measures to control disease

  -detect

  -monitor

  -response

  -provide evidence and prevent and control
• public health measures of controls

  1. reservoir: if animal you can immunised or destroy it
  2. transmission: immunisation, surveillance and quaratone
  3. individuals: treatment through pathogen eradication
• re-emerging disease 


  go away and come back
• why during COVID-19 did reports decrease

  • less people going to doctors
  • controls stopped diseases