UTIs: Causes and Risk Factors
UTIs: Causes and Risk Factors One of the most common types of infection, urinary tract infections (UTIs), occur when harmful microscopic organisms enter your urinary tract. Although these organisms can include fungi and viruses, most UTIs are caused by bacteria. Your body typically eliminates these bacteria before they can trigger symptoms, but risk factors ranging from sexual activity to underlying health problems can increase the likelihood of developing a urinary tract infection. Common Causes and Risk Factors While a UTI can occur in any part of your urinary system (including the bladder, kidneys, ureters, and urethra), most UTIs affect the bladder and urethra (i.e. the lower urinary tract). Escherichia coli , Klebsiella pneumoniae , and Proteus mirabilis ...