Any bacterial invasion of the urinary tract can cause urinary tract infection, with E. coli the most common, accounting for about 60-80%, followed by paraescherichia coli, Proteus, Klebsiella, aerobacter, alcaligenes, Streptococcus faecalis, staphylococcus or pseudomonas aeruginosa, and occasionally can be caused by fungi, viruses, parasites, etc.

The pathogenic bacteria of the above urinary sensation mainly come from the pathogenic bacteria that are usually found in the intestine, or the condition pathogenic bacteria that are normally parasitic in the intestine.

The general rule of infection is: the first urinary tract infection, asymptomatic bacterial urine, the pathogen is often E. coli; Most of the patients with urinary tract infection, urinary tract infarction, multiple antibiotics, urinary catheterization or cystoscopy were streptococcus faecalis, Proteus, Klebsiella and other infections.

Pseudomonas aeruginosa urinary tract infection is common after instrument examination. Proteus was more common in urinary calculi. Staphylococcus aureus is a common blood-borne infection.

In recent years, it has been found that plasma coagulase negative Staphylococcus aureus urinary tract infection is more common in women during the reproductive period, and its occurrence is mostly related to sexual life.