Lab 24

Question 1

wide variety of chemicals available for controlling the growth of microbes

Answer 1

antimicrobial agents

Question 2

chemical agents used on inanimate objects to lower the level of microbes on their surfaces

Answer 2

disinfectants

Question 3

chemicals used on living tissue to decrease the number of microbes

Answer 3

antiseptics

Question 4

result in bacterial death

Answer 4

bactericidal agents

Question 5

cause temporary inhibition of growth

Answer 5

bacteriostatic agents

Question 6

the standard method for measuring the effectiveness of a chemical agent

Answer 6

American Official Analytical Chemist’s use-dilution test

Question 7

which three strains of bacteria are typically used in the use-dilution test

Answer 7

salmonella enterica, staphylococcus aureus, and pseudomonas aeruginosa

Question 8

what is the use-dilution test limited to?

Answer 8

bactericidal compounds, it cannot evaluate bacteriostatic compounds

Question 9

metal rings are dipped into standardized cultures of test bacteria, removed, and dried. rings are next placed into solution of disinfectant, then transferred to a nutrient medium to permit growth of surviving bacteria

Answer 9

use-dilution test