Urinary tract infections are one of the most common afflictions caused by bacteria. It affects about 150 million people per year worldwide. Such types of infection are mainly associated with the presence of Escherichia coli, which initiates the infection from the periurethral area to the urethra and finally colonizes the bladder. Once there, bacteria can adhere to the walls, leading to biofilm formation. This can only occur not only in the bladder but also in indwelling urinary catheters.
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Source: Phys.org