 [ Symptoms ] toddler urinating every 5 minutes [ Disease ] no urinary tract infections are not contagious a person with a bacterial infection in their urinary tract could indeed transfer these bacteria to a vagina during sexual intercourse but it would be highly unlikely for the exposed person to get a urinary tract infection for this alone with that said you can develop a urinary tract infection on your own from sexual activity as a matter of fact this is listed as one of the most common causes in most cases it your own bacteria    bacteria from your colon and rectal area    that become contaminated or colonized in your vaginal area that gets transferred into your urethrabladder during sexual activity