Prof. Holderbaums Micro Class Ch. 9 Microbial Growth In The Environment

Front 1

___ refers to the removal or destruction of all microbes, including viruses and bacterial endospores.

Back 1

sterilization

Front 2

The term ___ describes an environment or procedure that is free of contamination by pathogens.

Back 2

aseptic

Front 3

____ refers to the use of physical or chemical agents to inhibit or destroy microorganisms.

Back 3

Disinfection

Front 4

When a chemical is used on the skin or other tissue, the process is called ___.

Back 4

antisepsis

Front 5

___ is the removal of microbes from a surface by scrubbing.

Back 5

Dergeming

Front 6

___ is the process of disinfecting plates and utensils used by the public to meet acceptable health standards.

Back 6

Sanitization

Front 7

____ is the use of heat to kill pathogens and reduce the number of spoilage in food and beverage.

Back 7

Pasteurization

Front 8

The permanent loss of reproductive ability under ideal environmental conditions is known as ___.

Back 8

microbial death

Front 9

True/False
The action of antimicrobial agents includes altering the cell walls or cytoplasmic membranes, and interrupting cellular metabolism and reproduction.

Back 9

True

Front 10

Cellular metabolism and reproduction can be interrupted by interfering with the structures of ___ and ___.

Back 10

proteins; nucleic acids

Front 11

True/False
Harsh chemicals or intense heat cannot be used on humans, this is one factor affecting antimicrobial methods.

Back 11

True

Front 12

True/False
The relative susceptibility of the microorganisms affect the efficacy of antimicrobial methods.

Back 12

True

Front 13

The most resistant microbes are ____.

Back 13

bacterial endospores

Hint 13

specifically the species myocobacterium and the cysts of protozoa

Front 14

True/False
Another factor affecting antimicrobial methods includes the environmental conditions under which it is used.

Back 14

True

Front 15

True/False
Cool disinfectants work better than warm ones.

Back 15

False

Hint 15

warm work better

Front 16

The ____ involves soaking paper disks with the agents to be studies and incubating them on an inoculated medium overnight.

Back 16

disk-diffusion method (kirby bauer method)

Front 17

An area where bacteria do not grow is called the ____.

Back 17

zone of inhibition

Front 18

___ provide accurate determination of an agent's efficacy under real life conditions.

Back 18

In-use tests

Hint 18

Ex. swab taken in an E.R. department

Front 19

Physical methods of microbial control include exposure to extreme heat or cold, desiccation, filtration, ____ and radiation.

Back 19

osmotic pressure

Front 20

The ____ is the lowest temperature that kills all cells in a broth in 10 minutes.

Back 20

thermal death point

Front 21

The ___ is the time it takes to sterilize a volume of liquid.

Back 21

thermal death time

Front 22

___ is the time required to destroy 90% of the microbes in a sample.

Back 22

Decimal reduction time

Front 23

An ___ is a device consisting of a pressure chamber, pipes, valves, and gauges that uses steam heat under pressure to sterilize chemicals and objects that tolerate moist heat.

Back 23

autoclave