Microbiology Lab 24- Chemiclas Method of Control: Disinfectants and Antiseptics Flashcards


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1

What are chemicals for controlling the growth of microbes called?

antimicrobial agents

2

Disinfectts are _________________.

Chemical agents used on inanimate to lower the level of microbes on their surfaces.

3

Antoseptics are __________________.

Chemicals used on living tissue to decrease the number of microbes.

4

Disinfectnants and antiseptics affect bacteria in many ways. Those that result in bacterial death are __________.

batericidal agents

5

Those agents causing temporary inhibition of growth are ______________.

bacteriostatic agents

6

True or false. Antimicrobial agents but be matched to specific organisms and environmental conditions.

true

7

Variables in selecting an ntiicrobial agent are ________,________,______,
_____, _________, ___________,

pH
soluability
toxicity
organic material present
cost

8

Factors in evaluating the effectiveness of antimicrobial agents are :

concentration
length of contact
whether it is lethal (-cidal) or inhibiting (static)

9

What is the DRT?

decimal reduction time
The time it takes to kill 90% of the tst microbial population

10

The most standard method for measuring the effectiveness of a chemical agent is______________________.

Use-dilution test

11

What agent can you use in a use-dilution test?

batericidal
can't use bacteristatic because it is only temporary and it does not kill the microbes

12

What type of plate is used for the use-dilution test?

Nutrient agar

13

What 3 bacterias are commonly used in use-dilution test?

1.staphylococcus aureus
2. Salmonella enterica Choleraesuis
3. Pseudomonas aeruginosa

14

To perform a use dilution test _____ are dipped into ________ removed and dried.
The rigs are then placed into a solution of ________ at the concentration recommended by the manufacturer. Of _____ minutes at _____ degrees.

metal rings
standardized cultures
disinfectant
10 minutes
20*C

15

True or false the use-dilution test can be used on bacteriostatic compounds.

false