Chapter 14: Antimicrobial Agents

Chapter 14: Antimicrobial Agents

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. The simplest and most common method of preparing bacteria for examination and identification is

ANS:  D

The simplest and most common preparation is the Gram stain. This stain designates bacteria into two major classes: gram-positive (stain purple) or gram-negative (stain pink). Bacteria stain differently depending on the structural components of their cell wall. These structural components also affect their susceptibility to antimicrobials.

REF:   p. 239

2. The most common pathogens responsible for community-acquired pneumonia include which of the following?
3. Haemophilus influenzae
4. Chlamydia pneumoniae
5. 3. Streptococcus pneumoniae
6. Legionella pneumophila
7. Mycoplasma pneumoniae

ANS:  D

Research has shown that the most common pathogens responsible for community-acquired pneumonia include Streptococcus pneumoniae; Haemophilus influenzae; and atypical (intracellular) organisms such as Mycoplasma pneumoniae, Chlamydia pneumoniae, and Legionella pneumophila. Consequently, empiric therapy for community-acquired pneumonia involves antimicrobials active against this spectrum of organisms.

REF:   p. 241

3. A drug that inhibits the growth of bacteria is called

ANS:  A

Drugs that inhibit the growth of bacteria but do not kill them are termed bacteriostatic. A bactericidal drug is one that kills bacteria. Virucidal drugs kill viruses, and fungicidal drugs kill fungi.

REF:   p. 240

4. A bactericidal agent

ANS:  C

Drugs that kill bacteria are termed bactericidal. A bacteriostatic drug inhibits the growth of bacteria but does not kill them. Virucidal drugs kill viruses, and fungicidal drugs kill fungi.

REF:   p. 240