There are many types and causes of head injury, but, by far, the most common are concussions related to motor vehicle accidents and contact sports. Concussion comes from the Latin âConcutereâ, which means to shake violently.
Noun. 1. pyelonephritis-inflammation of the kidney and its pelvis caused by bacterial infection. urinary tract infection-any infection of any of the organs of the urinary tract. acute pyelonephritis-pyelonephritis resulting from the spread of a bladder infection.
Pyelonephritis may start with similar symptoms. However, once the infection has spread to the kidney, signs of more severe illness usually result. They include: 1  Back pain or flank pain.2  Fever (usually present) or chills. 3  Feeling sick (malaise). 4  Nausea and vomiting. 5  Confusion (especially in the elderly).owever, once the infection has spread to the kidney, signs of more severe illness usually result. They include: 1  Back pain or flank pain. 2  Fever (usually present) or chills. 3  Feeling sick (malaise). 4  Nausea and vomiting.