Control Of Microbial Growth

Question 1

Examples of Bacteriostasis

Answer 1

Refrigeration
Freeze drying (lyphilization)
Rapid freezing through liquid nitrogen

Question 2

Lowest temperature that will kill all organisms in a standardized culture with specified period of time

Answer 2

Thermal Death Point

Question 3

Two methods of using heat

Answer 3

Moist Heat Sterilization

Dry Heat Sterilization

Question 4

Destruction or removal kf pathigens from nonliving objects by physical kr chemical methods

Answer 4

Disinfection

Question 5

Stop or inhibition of microbial growth or multiplication

Answer 5

Bacteriostasis

Question 6

Ways of controlling sources of infections

Answer 6

Destruction of disease-causing microbes
Blocking source, vector and route of transmission of disease agents
Improvement of body defenses and host resistance

Question 7

Common vector

Answer 7

Insects

Question 8

Free or devoid of pathogens or the absence of significant contamination

Answer 8

Asepsis

Question 9

The complete or total destruction of all organisms including cells, viable spores and viruses

Answer 9

Sterilization

Question 10

Factors that influence effectiveness of antimicrobial procedures

Answer 10

Length of time applied
Concentration
Temperature
Nature and number of microorganisms present
Presence of organic matter

Question 11

Organic matter

Answer 11

Urine
Stool
Blood
Sputum

Question 12

Growth of pathogens in living tissues which indicates a disease process or contamination

Answer 12

Sepsis

Question 13

Dry heat characteristics

Answer 13

Protein oxidation
Slower
Higher temperature
More destructive
Less efficient

Question 14

Steam

Answer 14

70 degrees celsius

10 minutes

Question 15

What are the physical agents of sterilization?

Answer 15

Mechanical methods
Use of heat
Other methods like Ultrasonics and radiation

Question 16

Length of time necessary to kill a pure culture at a specified temperature

Answer 16

Thermal Death Time

Question 17

Examples of Moist Heat Sterilization

Answer 17

Boiling
Steam
Pressurized steam
Autoclave
Pasteurization
UHT
HTST

Question 18

What does HTST stands?

Answer 18

High Temperature Sterilization or High Temperature Slow Time

Question 19

What does UHT stands?

Answer 19

Under high temperature

Question 20

Practical, inexpensive and effective

Answer 20

Use of heat

Question 21

Examples of filtration

Answer 21

Cellulose membrane
Asbestos
Unglazed porcelain
Layer of sand
Sintered glass
HEPA Filters

Question 22

Mechanical Methods

Answer 22

Filtration
Scrubbing
Sedimentation

Question 23

Pressurized steam

Answer 23

Max 121 degrees celsius

Question 24

Involves mild heating to destroy microbes found in milk, beer, wine and other dairy products without losing nutritional value

Answer 24

Pasteurization

Question 25

HTST

Answer 25

72 degrees celsius- -15 seconds

Question 26

UHT

Answer 26

140 degrees celsius- less than a second

Question 27

Autoclave

Answer 27

121 degrees celsius- 15 pounds per square inches- 20 minutes

Question 28

Ideal for cooking

Answer 28

Steam

Question 29

Moist heat sterilization characteristics

Answer 29

``` Protein Coagulation Faster Low temperature Less destructive More efficient ```

Question 30

Used together with a nonliving object or inanimate object

Answer 30

Disinfectant

Question 31

Methods of dry heat sterilization

Answer 31

Flaming, burning or incineration | Hot air sterilization

Question 32

Other term for hot air sterilization

Answer 32

Dry heat baking

Question 33

Smell of protein oxidation

Answer 33

Burnt hair

Question 34

Uses an oven or hot air sterilizer and used for glasswares, surgical instruments or any material destroyed in presence of water like oil or powder

Answer 34

Hot air sterilization or dry heat baking

Question 35

Used in association with a living body or tissue

Answer 35

Antiseptic

Question 36

Used for contaminated disposable materials like wire loop or needle

Answer 36

Flaming, burning or incineration

Question 37

Common organic disinfectant

Answer 37

Phenol or Carbolic acid

Question 38

Ideal boiling point

Answer 38

100 degrees celsius

Question 39

Preserving the body

Answer 39

Cryogenics