WHAT IS YEAST INFECTION? A vaginal yeast infection is an infection caused by yeast (a type of fungus). Vaginal yeast infection is sometimes referred to as yeast vaginitis, Candidal vaginitis, or Candidal vulvovaginitis. The scientific name for the yeast that causes vaginitis is Candida. Over 90% of vaginal yeast infections are caused by the species known as Candida […]