Disinfectant chemicals

Question 1

General info about disinfection chemicals

Answer 1

-none are perfect
strengths and limitations based on the following 
- organisms
- material being disinfectant
- organic matter
- cost + conditions

Question 2

Acids and alkalis

Answer 2

cheap and available

resistant to organic matter

Question 3

Alcohol

Answer 3

• skin disinfection
• longer chain = more activity
  fast but low residual

Question 4

Aldehydes

Answer 4

• endoscopes
• wide microbial range
• heat sensitive equipment
• toxic

Question 5

Chlorohexidine

Answer 5

• skin - as it is an non irritant
  0. 5% water solution –> oral mucous membrane
  0. 5% OH sol skin - 5 -10mins contact times

Question 6

Chorine

Answer 6

• halo disinfectant
• wide pathogen range
• cheap and accessible
  carious uses based on concentration
  limitations ( corrosive, irritant to mm, storage must be fresh

Question 7

Iodine

Answer 7

Halogen disinfectant
wide range  + highly effective
low irritant so used on teats
stains
anti fungal scrub

Question 8

Oxidixing agents

Answer 8

Environment
Ex hydrogen peroxide
peroygen biocide
- expensive - low toxicity
eg virkon

Question 9

Phenols

Answer 9

old, so not used anymore as toxic to cats and resistant tot organic material

Question 10

alkylating gases

Answer 10

pros highly diffusible - heat sensitive material + electronics
cons toxic, corrosive flammable - special equpitne