Can a UTI be contageous by sharing the same toilet?

No, a urinary tract infection (UTI) is not contagious and cannot be transmitted by sharing the same toilet. UTIs are typically caused by bacteria that originate from a person's own body, often from the gastrointestinal tract. While good hygiene practices are important, the risk of spreading a UTI through toilet use is extremely low. It is mainly caused by factors like sexual activity, certain medical conditions, or improper hygiene rather than direct person-to-person transmission.