Mobiluncus, a genus associated with polymicrobial vaginal infections, is most closely linked to which condition?

• A. Bacterial vaginosis
• B. Meningitis
• C. Urinary tract infection
• D. Pneumonia

Answer: (A)

Mobiluncus is part of the anaerobic bacterial overgrowth that characterizes bacterial vaginosis. In BV, the normal Lactobacillus-dominated vaginal flora shifts to a mixed, polymicrobial community rich in anaerobes, including Mobiluncus, Gardnerella, and Prevotella. This dysbiosis leads to symptoms like discharge and odor and is reflected in diagnostic clues such as a higher vaginal pH and the presence of clue cells on microscopy. Meningitis, urinary tract infections, and pneumonia involve different sites and typically different pathogens, so Mobiluncus is not associated with those conditions. The most closely linked condition for Mobiluncus is bacterial vaginosis.