Tetracyclines are effective against which of the following? 1. Protozoa 2. Mycoplasmas 3. Rickettsiae 4. Gram-positive microorganisms 5. Gram-negative microorganisms

a. 4 and 5 only
b. 2 and 3 only
c. 1, 2, and 4 only
d. 1, 2, 3, 4, and 5


ANS: D

Health Professions

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