Bacterial Vaginosis Diagnosis and Treatment

Understanding Bacterial Vaginosis

Bacterial vaginosis (BV) is a clinical syndrome resulting from replacement of the normal H₂O₂-producing Lactobacillus species in the vagina with high concentrations of anaerobic bacteria, Gardnerella vaginalis, and Mycoplasma hominis, as reported by the Centers for Disease Control and Prevention (CDC) 1, 2
BV is the most prevalent cause of vaginal discharge or malodor, though up to 50% of women with BV may be asymptomatic, according to the CDC 2
BV is associated with having multiple sexual partners, though it's unclear whether it results from acquisition of a sexually transmitted pathogen, as noted by the CDC 2
Women who have never been sexually active are rarely affected by BV, as stated by the CDC 1

BV can be diagnosed using clinical criteria (Amsel criteria) requiring three of the following: a homogeneous, white, noninflammatory discharge that smoothly coats the vaginal walls, the presence of clue cells on microscopic examination, a pH of vaginal fluid greater than 4.5, and a fishy odor of vaginal discharge before or after addition of 10% KOH (the whiff test), as recommended by the CDC 1, 2
Alternatively, Gram stain can be used to determine the relative concentration of bacterial morphotypes characteristic of BV, as suggested by the CDC 1, 2

BV is associated with several complications, including endometritis, pelvic inflammatory disease (PID), and vaginal cuff cellulitis after invasive procedures, as reported by the CDC 1, 3
Adverse pregnancy outcomes, including premature rupture of membranes, preterm labor, preterm birth, and postpartum endometritis, are also associated with BV, according to the CDC 2
Increased susceptibility to sexually transmitted infections is another complication of BV, as noted by the American College of Obstetricians and Gynecologists (ACOG) is not mentioned, however, the CDC does not mention this, but Praxis Medical Insights does 4

All women who have symptomatic disease require treatment, regardless of pregnancy status, as recommended by the CDC 1
Recommended treatment is metronidazole 500 mg orally twice daily for 7 days, as suggested by the CDC, however the CDC does not mention this, but Praxis Medical Insights and the American College of Obstetricians and Gynecologists (ACOG) does not mention this, however, Praxis Medical Insights does 5
Alternative regimens include metronidazole gel 0.75% intravaginally once daily for 5 days or clindamycin cream 2% intravaginally at bedtime for 7 days, as recommended by Praxis Medical Insights 5

Treatment of male sex partners has not been shown to be beneficial in preventing the recurrence of BV, as stated by the CDC 1, 2
Patients using metronidazole should avoid alcohol during treatment and for 24 hours afterward due to potential disulfiram-like reaction, as recommended by Praxis Medical Insights 5
Clindamycin cream is oil-based and might weaken latex condoms and diaphragms, as noted by Praxis Medical Insights 5
BV has a high recurrence rate (50-80% within a year), which may necessitate repeated treatments, as reported by Praxis Medical Insights 4

Not treating BV before invasive gynecological procedures, which may increase risk of post-procedure infections, as recommended by the CDC 1, 3
Overlooking BV in pregnant women, as it is associated with adverse pregnancy outcomes, as noted by the CDC 2