The common causative agents of urinary tract infections mainly include two major groups of gram-negative and gram-positive bacteria. Gram-negative bacteria mainly include Escherichia coli, which accounts for about 70% or more of the causative organisms of human urinary tract infections, and other Gram-negative bacteria include Klebsiella and Aspergillus chimaera. There is also a large group of gram-positive bacteria, mainly enterococci, the most common enterococci in urinary tract diseases are Enterococcus faecalis and Enterococcus faecalis, these two types of cocci once caused by urinary tract infections, are more serious infections, and sometimes even lead to infectious shock.