6) The toxicity of a given drug is expressed as the A) selective toxicity. B)

6) The toxicity of a given drug is expressed as the A) selective toxicity. B) therapeutic index. C) biocide index. D) biostatic index. E) bacteriostatic window. 7) A high therapeutic index is A) more toxic to the patient. B) less toxic to the patient. C) has no effect on the patient. D) has no effect on the pathogen. E) more toxic to the patient AND has little effect on the pathogen. 8) Drugs that are bacteriostatic A) kill all bacteria. B) promote bacterial growth. C) inactivate bacterial spores. D) inhibit the growth of bacteria. E) kill infected host cells. 9) Antimicrobials that kill microorganisms have the suffix A) -cidal. B) -static. C) -anti. D) -genic. E) -acto. 10) Antibiotics that affect various strains of Gram-positive bacteria and various strains of Gram-negative bacteria are called A) isolate usable. B) stress-induced. C) broad-spectrum. D) narrow-spectrum. E) intermediate.

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