chapter 10 textbook questions

Question 1

a compound synthesized by bacteria or fungi that destroys or inhibits the growth of other microbes is a/an

Answer 1

antibiotic

Question 2

the main considerations in selecting an effective antimicrobial are

Answer 2

• the identity of the infecting microbe
• the microbe’s sensitivity to available drugs
• the overall medical status of the infected host

Question 3

drugs that prevent the formation of the bacterial cell wall are

Answer 3

penicillins

Question 4

microbial resistance to drugs is acquired through

Answer 4

• conjugation
• transformation
• tranduction

Question 5

antimalarial treatments are difficult beacause

Answer 5

• the protozoal parasite (plasmodium) is eukaryotic
• there are several species of plasmodium
• no single drug can target all the life stages of plasmodium

Question 6

most antihelminthic drugs function by

Answer 6

inhibiting worm metabolism

Question 7

the MIC is the______ of a drug that is required to inhibit growth of a microbe

Answer 7

smallest concentration

Question 8

an antimicrobial drug with a ___ therapeutic index is a better choice than one with a ___ therapeutic index

Answer 8

high; low

Question 9

state the main goal of antimicrobial treatment

Answer 9

administer a drug to an infected person, which destroys the infective agent without harming the host’s cells