What is Urinary tract infection?
{{Infobox disease | Name = Urinary tract infection | ICD10 = {{ICD10|N|39|0|n|30}} | ICD9 = {{ICD9|599.0}} | ICDO = | Image = Pyuria.JPG | Caption = Multiple [[white blood cell|white cells]] seen in the urine of a person with a urinary tract infection using a [[microscope]] | OMIM = | OMIM_mult = | MedlinePlus = 000521 | eMedicineSubj = emerg | eMedicineTopic = 625 | eMedicine_mult = {{eMedicine2|emerg|626}} | DiseasesDB = 13657 | MeshID = D014552 }} A '''urinary tract infection''' ('''UTI''') is an [[infection]] caused by [[bacteria]] in the [[Urinary system|urinary tract]]. The urinary tract is: the [[Kidney|kidneys]], [[Ureter|ureters]], the urinary [[bladder]], and [[urethra]]. [[Symptom]]s of a UTI may be painful [[Urination|peeing]], frequent peeing, or wanting to pee (or both). Symptoms of a kidney infection include [[fever]] and [[Abdominal pain|side and back pain]]. In older people and young children, the symptoms are not always clear. Often the main cause of a UTI is the bacteria ''[[Escherichia coli]].'' Other bacteria, [[virus]]es, or [[fungus|fungi]] may be the cause less often. Women get urinary tract infections more often than men. Half of women have an infection at some point in their lives. It is common for a person to have many UTI infections in their life. One risk factor for having a UTI is [[sexual intercourse]]. Sometimes a person who has a bladder infection will get a kidney infection. Kidney infection may also, but rarely, be caused by bacteria in the blood. Diagnosis in young healthy women can be based on symptoms alone. Sometimes, the urine needs to be tested. A person with frequent infections can take low-dose [[antibiotic]]s to prevent future infections. Antibiotics are used to treat simple cases of urinary tract infections. [[Antibiotic resistance|Resistance]] to antibiotics is increasing. People who have complicated urinary tract infections sometimes have to take antibiotics for a longer time,