Control Of Microorganisms

Question 1

Hazard group 1:

Answer 1

unlikely to cause human disease

Question 2

hazard group 2:

Answer 2

can cause human disease, but unlikey to spread to community and there is usually prohpylaxis or treatment

Question 3

hazard group 3:

Answer 3

can cause severe human disease and may spread to community but there is usually prohpylaxis and treatment.

Question 4

hazard group 4:

Answer 4

Can cause severe human illness and is likely to spread to the community, there is usually no prophylaxis or treatment.

Question 5

Sterilisation:

Answer 5

All microbes are removed

Question 6

Disinfection:

Answer 6

killing, inhibition or removal of microbes that cause infections from inatimate objects

Question 7

Sanitation:

Answer 7

Reduction of microbial load to a level which is considered safe

Question 8

Antiseptics:

Answer 8

Similar to disinfectants but used on living matter

Question 9

3 physical methods of control

Answer 9

Dry heat (flame, oven)
Moist heat (boiling, pasteurisation)
Irradiation (UV)

Question 10

Methods of removal

Answer 10

Filtration: depth filters

membrane filters

Question 11

7 chemical methods of control:

Answer 11

phenolic
halogen-releasing compounds
alcohols
quaternary-ammonium compounds
aldehydes
oxidising agents
sterilising gases

Question 12

Aseptic technique:

Answer 12

proecdure used by medical staff to prevent the spread of infection

Question 13

Why use aseptic technique?

Answer 13

microbes are everywhere
must be sure the microbe being studied is from sample not from environment
in hospitals and pharmaceutical injury, very important that tools and equipment are microbially safe