More than one way: Urinary tract infections (UTI) are more common in women and infection often travels up the urethra into the bladder. Infection of the kidney usually occurs from bacteria in blood stream settling in the kidney. You may consult this site for more info. http://www.nhs.uk/conditions/Urinary-tract-infection-adults/Pages/Introduction.aspx
Answered 3/22/2020
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