Hello, Mind If We Ask... Supposing That If We Was

Hello, mind if we ask... Supposing that if we was a male and if we have previously have an intercourse by an unknown prostitute for many years ago... Are you still considered as the carrier of STDs even though you tried to wash your genitals with any soap that kills any types of germs and such? Will the doctors have to ask the male patient how many years has it been to have an intercourse with someone else other than your partner?