The bacteria often exist in human feces, water and soil containing animal carcasses, is a normal intestinal flora, belongs to the conditional pathogenic bacteria, the body does not have a pathogenic effect under normal circumstances, if the human body has intestinal flora disorders or immune system decline and other stress conditions will cause disease, often cause urinary tract infections, the severity of the infection is related to the situation. Aspergillus mirabilis is second only to Escherichia coli, the main pathogenic bacteria causing urinary tract infections, and Aspergillus infection may be related to the formation of kidney stones and bladder stones, and in serious cases some strains can cause sepsis, peritonitis, meningitis, etc. Urine culture and drug sensitivity test should be performed promptly after the infection appears, and antibacterial treatment should be carried out promptly after the diagnosis is confirmed, and attention should be paid to local cleanliness and hygiene.