<s>[INST] I have been in a monogamas relationship for years was seen by gyn 3yr ago was fine! Still with Same partner and I go to gyn last week -that said I had trichomoniasis! My partner went to get checked and he says he donot have it!! How is this possible????? I have not been with any one else!!! So how I have it and he doesn t?-we been together 15yrs. Now he thinks I cheated!! [/INST] Hi, Thanks for the query. I understand your concern. Trichomoniasis is a protozoal infection spread mostly by sexual relations (vaginal, oral or anal sex).  - Only possibility of its nonsexual transmission can be use of contaminated towel / from a toilet seat.  - Many a times symptoms are evident earlier in women due to the peculiar physical conditions & though male partner is infected he may not suffer from the symptoms.  -Itching & white discharge is seen in females with diabetes/ after menopause due to vaginal Candidiasis...(which is not sexually transmitted) & it can be differentiated from trichomoniasis by careful inspection/ microscopic swab testing.  So you need to rule out all these possibilities before blaming each other / misunderstanding.  Thanks </s>