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 urethra/bladder during sexual activity.
are urinary tract infections contagious. my boyfriend has a kidney stone and had a lithotripsy done to break it up. they inserted a stent and it has been there for a few months. during which we had sex and he was given an rx for a u. t. i. but didn't take it. i want to see if he does have a u. t. i. could it be contagious or can it cause any other complications for me?