Urinary tract infections (UTIs) are a frequent health problem.
They are caused mainly by enterobacteria of intestinal origin, such as Escherichia coli. They are more frequent in women than in men. It is estimated that between 50 and 60 percent of adult women will have at least one episode of UTI in their lives.
The bacterium migrates from the anus to the urinary tract, where it attaches to epithelial cells with bacterial adhesion factors called pili or fimbriae. Once the pathogenic bacteria have attached to the urethral wall, they can already intake food and only have to multiply and proliferate.