There are different types of urinary tract infections, hospital-acquired (associated with the installation of a urinary catheter) and community-acquired urinary tract infections.
Acute urinary tract infections are among the most common. For example, in the United States, about 5.5 million patients seek medical help annually for UTI's, with women suffering from them much more often.
This condition occurs with a frequency of 1-3% among school-age girls, but then the incidence increases sharply at the onset of sexual activity.
According to data from various countries around the world, 25 to 40% of women have experienced at least one UTI - inflammation of the lower urinary tract.
Most of the acute urinary tract infections occur in young, sexually active women.
In old age, asymptomatic bacteriuria (according to several studies in 40-50% of cases) is equally common observed in persons of both sexes.
In men, UTIs usually occur at the age of 50 years and older.
Asymptomatic bacteriuria is also more often observed in women 20-50 years old.