Bacterial Vaginosis (also known as BV and vaginal bacteriosis) is the number one cause of infection of the vagina. It often develops as a result of sexual intercourse like many sexually transmitted diseases though is not generally classified as one itself. This is due to the unique cause of the infection which is a result of an imbalance of the naturally occurring flora of the vagina. This means it can be caused by intercourse even when the other partner does not have any infection themselves as well as clothing and other items that come into contact with the genitals.
The healthy vaginal flora is made up of microorganisms such as lactobacillus jensenii and lactobacillus crispatus. In someone who has bacterial vaginosis however, the amount of lactobacillus will be reduced and this allows for the production of more unwanted bacteria such as Gardnerella vaginalis, Bacteroides, Mycoplasma and Mobiluncus and the further reduction of healthy bacteria. This is generally caused by rubbing and this is how it can happen as a result of sexual intercourse. Another common cause is the wearing of thongs which again rubs against the vagina and anus. This occurs mainly in sexually active women aged between 15 and 45, though it can also occur in pre-pubescent girls as a result of strep and improper hygiene following bowel movements.
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