<prompt> Which of the following conditions is most likely to be associated with a vaginal pH of 6?Atrophic vaginitisCandidal vaginitsDoderleins bacillusGardnella vaginitis  <response>: - Normal pH of vagina is 3.8 to 4.5. A pH of 6 is alkaline which ours Trichomoniasis Bacterial vaginosis. - Bacterial vaginosis is more common. It include Gardnella vaginalis, Ureaplasma urealyticum, Mobiluncus species, Mycoplasma hominis, and Prevotella species. - pH of vagina:- Before pubey - 7 At pubey - the pH becomes acidic 4-4.5 , it occurs due to Doderlein bacteria which conves glycogen present in vaginal epithelium into lactic acid under the influence of oestrogen. Post menopause 7 Doderlein bacteria disappears after menopause 