chapter 9: physical and chemical microbial control

Question 1

what is a biocide?

Answer 1

anything that can be used to control a microbe

Question 2

what is sterilizing ?

Answer 2

when we remove completely all presence of living cells, spores, and viruses

Question 3

what is disenfection?

Answer 3

when we remove or inhibit microbes from multiplying. (typically on an inanimate object)

Question 4

do disenfectants sterilize?

Answer 4

no

Question 5

understand what sanitizing something is

Question 6

what is antisepsis?

Answer 6

when we reduce the number of microbes on living tissue. this can also be done to combat sepsis

Question 7

what is chemotherapy?

Answer 7

when we use chemicals to kill microbes in host tissue

Question 8

what is the difference between -cides and -statics?

Answer 8

-cides kill and -statics inhibit growth

Question 9

what is sepsis?

Answer 9

when microbes enter and infect the bloodstream

Question 10

what is asepsis?

Answer 10

preventing the process of preventing agents into sterility

Question 11

understand and be able to explain why we do aseptic and antiseptic techniques and the difference between them

Question 12

why do we have different levels of cleanliness for medical tools such as critical, semi critical, and noncritical?

Answer 12

certain medical tools require sterility, others may only require disinfection

Question 13

what happens when alcohol or a detergent targets a cell’s wall?

Answer 13

it can either destroy it or it can inhibit the synthesis

Question 14

what does moist heat do for a microbe?

Answer 14

it destroys bacterial cells and viruses

Question 15

does moist heat automatically mean sterilization?

Answer 15

no we need something of a higher heat above boiling to do this process

Question 16

when we think about boiling, does this become disenfection, sanitizing, or sterilization?

Answer 16

disenfection

Question 17

when we pass instruments in an autoclave (which uses moist heat at above 100 degrees celcius) what happens?

Answer 17

they become sterilized (think big heat=big consequences for microbes and spores)

Question 18

what is pasteurization?

Answer 18

using heat to clean milk from any microbes that may be present

Question 19

understand the use of dry heat

Question 20

thermal death time is what ?

Answer 20

the ammount of time it takes for the heat to kill the microbes

Question 21

is uv radiation good?

Answer 21

it is lethal but it can not penetrate glass

Question 22

what is filtration?

Answer 22

a method to remove microbes is a substance

Question 23

what happens to food that we store with high osmotic pressure?

Answer 23

it gets preserved

Question 24

what happens when we store food in high enviornments of salt ?

Answer 24

it becomes preserved

Question 25

high level chemical agents are made to ____ spores and microbes

Answer 25

sterilize

Question 26

do intermediate agents kill bacterial spores?

Answer 26

no they kill fungal ones

Question 27

what do low level agents kill ?

Answer 27

vegetative bacteria