Answer to Question 1
ANS: A
Once an infection has occurred, systemic antimicrobials are recommended as treatment. Topical antiseptics will not be as effective. C. difficile occurs in the intestines. Concentrations of ethanol greater than 70 are less effective, and ethanol should not be applied to open wounds because of the risk of tissue damage and coagulation of proteins.
Answer to Question 2
ANS: B
Gardnerella vaginalis causes bacterial vaginosis and is treated with metronidazole gel. C. trachomatis is treated with systemic antibiotics. H. ducreyi, which causes chancroid, is treated with systemic antibiotics. T. vaginalis is treated with oral metronidazole.