Editor,—We would like to comment on the study by Arya and colleagues¹ in which they failed to find evidence for Mycoplasma hominis being pathogenic in the vagina, or otherwise contributing to bacterial vaginosis (BV). They mentioned the 21 year old review of Taylor-Robinson and McCormack² who surmised that M hominis might act in symbiosis with other organisms or as a sole pathogen in BV. The latter was referred to as non-specific vaginitis or Gardnerella associated vaginitis at that time, the term BV being used from about 1984. Since then, much has been learned about the vaginal microflora in health and disease, but …