After screening eligible participants will be randomized to receive either 1% SPL7013 Gel or hydroxyethyl cellulose (HEC) placebo gel at a dose of 5g administered vaginally at bedtime for 7 consecutive days. Participants will be assessed for BV (both by Amsel criteria and Nugent score) at screening/Baseline, after last application (End of Treatment, EOT, Day 9-12) and at the final study visit approximately 2-3 weeks after last dose (Test of Cure, TOC, Day 21-30).