Is BV, trich, and the other 2 common clamydia gonnorrhea STDs the only conditions that can cause a foul vaginal odor?

Vaginal odor. Any condition that causes an increase in vaginal bacteria can result in a foul odor. This is because some of these bacteria produce chemicals that are quite offensive to humans sense of smell. Chlamydia, Gonorrhea and Trich do not usually cause this, but BV does. Also foreign material such as retained toilet paper or parts of tampons can do this by increasing the bacterial count.