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A 24-year-old woman presents to her primary care physician with a chief complaint of 1 week of increased vaginal discharge with an unpleasant odor. She is sexually active with one partner and uses oral contraception for birth control. A pregnancy test is negative. Gynecologic examination reveals a pink cervix and a thin, white discharge. The discharge has a positive amine “whiff” test and a pH of 6. Wet saline mount microscopy yields the following image.
What is the etiology of this condition?
A. Facultative intracellular bacteria infection
B. Fungal infection
C. Parasitic infection
D. Polymicrobial synergistic infection
E. Viral infection
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