Considered part of normal human flora of the mouth, digestive tract, vagina and skin, but can be involved in infections, for example in a wound. Peptococcus niger is the last species left in this genus, with all others moved to Peptostreptococcus.
Peptococcus spp. vulvovaginal colonisation and infections

Jessica Lloyd
Jessica is a degree-qualified naturopath (BHSc) specialising in vulvovaginal health and disease, based in Melbourne, Australia.
Jessica is the owner and lead naturopath of My Vagina, and is a member of the:
- International Society for the Study of Vulvovaginal Disease (ISSVD)
- International Society for the Study of Women's Sexual Health (ISSWSH)
- National Vulvodynia Association (NVA) Australia
- Australian and New Zealand Vulvovaginal Society (ANZVS)
- Australian Traditional Medicine Society (ATMS)