Final answer:
Mrs. Davis's symptoms of thin vaginal discharge with a fishy odor, but no itching, are indicative of bacterial vaginosis (BV), particularly caused by Gardnerella vaginalis. It is important for her to seek medical consultation for diagnosis and treatment.
Step-by-step explanation:
Mrs. Davis, a 46-year-old patient, is experiencing symptoms indicative of bacterial vaginosis (BV). The characteristic thin vaginal discharge with a fishy odor and absence of itching are common signs of this condition. BV is caused primarily by an imbalance in the normal vaginal microbiota, typically involving Gardnerella vaginalis. This bacterium can result in the notable fish-like odor, thus distinguishing BV from other forms of vaginitis such as Candida vulvovaginitis, which presents with a cottage cheese-like discharge and itching, or Trichomoniasis, which often has a frothy, yellow-green discharge and significant itching. Given the absence of symptoms like itching and the described nature of discharge, Mrs. Davis is likely to be suffering from BV rather than candidiasis or trichomoniasis.
To confirm the diagnosis of bacterial vaginosis, microscopic examination, culture, or pH testing of the vaginal discharge can be employed to detect the presence of causative bacteria and the characteristic high vaginal pH associated with BV. Treatments typically include antibiotic medications to restore the normal vaginal flora and alleviate symptoms. It is advised that Mrs. Davis consults her healthcare provider for a definitive diagnosis and appropriate treatment.