Bacterial vaginosis can be non STD. This may be due to change in the pH of the vagina and neosprin can be the culprit.
Treatment of the bacterial vaginosis is cumbersome. Following are the treatment modalities;
1) Metronidazole (flagyl) and clindamycin have been the drugs of choice.
2) Azithromycin too is effective, especially if there is recurrence or persistence. Secnidazole, ornidazole and tinidazole are also used in the case of antibiotic resistance.
3) Antiseptics as vaginal suppositories;
c) dequalinium chloride,
d) polyhexamethylene biguanide,
e) povidone iodine
f) hydrogen peroxide
5) Stop douching or bubble bath, if one does.
6) Avoid liquid sopas and body wash.
But trichomoniasis transmission occurs predominantly via sexual intercourse. Though rarely it can be transmitted via clothes, linen etc. So with no previous partners; this may be the explanation. Or the diagnosis may be wrong. Usually it is diagnosed by saline mount test in office. You may get a culture test for the confirmation which is the current criterion standard for trichomoniasis diagnosis.
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