By the authority vested in me as President by the Constitution and the laws of the United States of America, including the Immigration and Nationality Act (INA) (8 U.S.C. 1101 et seq.), and in order to ensure the public safety of the American people in communities across the United States as well as to ensure that our Nation's immigration laws are ...
Pyelonephritis is a bacterial infection of one or both kidneys. Infection can spread up the urinary tract to the kidneys, or uncommonly the kidneys may become infected through bacteria in the bloodstream. Chills, fever, back pain, nausea, and vomiting can occur. Urine and sometimes blood and imaging tests are done if doctors suspect pyelonephritis.
As a rule, the farther up in the urinary tract the infection is located, the more serious it is. 1  The upper urinary tract is composed of the kidneys and ureters. 2  Infection in the upper urinary tract generally affects the kidneys (pyelonephritis), which can cause fever, chills, nausea, vomiting, and other severe symptoms. The lower urinary tract consists of the bladder and the urethra. 2  Infection in the lower urinary tract can affect the urethra (urethritis) or the bladder (cystitis).