QUIZ 1. What is least likely to be a reason to use a bactericidal drug? a. In an immunocompromised host b. With a particularly virulent organism c. When the organism isn’t known d. When the infection is life-threatening Answer: c. Each of these is a situation in which a bactericidal drug is recommended; however, it is not necessarily recommended when the infection is not known. 2. Which type of antibiotic is generally chosen empirically when the causative organism isn’t known? a. Broad-spectrum b. Narrow-spectrum c. Bactericidal d. Bacteriostatic Answer: a. A broad-spectrum antibiotic is often chosen when the causative agent isn’t known so that there is a greater chance of covering for the most probably organism in the infection. 3. What do the beta-lactam drugs have the most affect on with regard to antibacterial activity? a. DNA synthesis b. Cell membrane c. Cell wall d. Metabolism Answer: c. The beta-lactam antibiotic classification is one that acts directly on cell wall synthesis, which is something relatively unique to prokaryotes.
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