Chapter 5- Control Of Microbial Growth

Question 1

What kind of moist heat sterilizations are there ?

Answer 1

1. Boiling

2. Autoclave

Question 2

What does boiling do to bacteria ?

Answer 2

Kills vegetative form. Although endoscopes and some viruses are not destroyed quickly.

Question 3

What is autoclave ?

Answer 3

Autoclave is when a bacteria is steamed under pressure to achieve temperature above boiling point.

Question 4

Why does autoclave require extra time?

Answer 4

Because when hearing larger materials it requires extra time for the heat it reach the center if solid materials.

Question 5

What kind of milk pasteurization is used today ?

Answer 5

A. High temperature short time (HTST)

B. Ultra high temperature (UHT)

Question 6

What is dry heat sterilization ?

Answer 6

Drying heat that kills by oxidation effects

Question 7

What kinds of dry heat sterilization are there?

Answer 7

1. Flaming
2. Incineration
3. Hot air sterilization in hot air oven

Question 8

What are the physical methods of microbial control?

Answer 8

Heat, filtration, low temperature, desiccation, osmotic pressure, radiation