Hello, and I am pleased to help, use of my answers are for educational purposes only.
No, BV - bacterial vaginosis is an Overgrowth of NORMAL vaginal bacteria, so by definition, men do NOT get affected by BV. So, men do NOT need to be treated, and women actually do not always need to be treated with antibiotics - sometimes a pH balancing product such as RepHresh or Boric Acid vaginal suppositories can help keep the vagina balanced and hence no more BV.
RepHresh is available OVER the counter - so you can get this at any pharmacy, no prescription is required.
Boric acid will require a prescription.
And, they can be just as effective as antibiotics.
Basically she can use the RepHresh when she feels or notices the odor and use for a few days each time - this is just trying to keep the vagina with a perfect pH balance and this will keep the vaginal bacteria to a minimum with a good vaginal pH.
You can have sex, but realize that semen/sperm does set off the abnormal vaginal pH, so she should use the RepHresh soon after sex and then she will not have an odor.