This document discusses acute pyelonephritis, including its symptoms, diagnosis, and treatment. It presents three case studies related to pyelonephritis. Case study 1 compares the effectiveness of two antibiotic treatments for pyelonephritis. Case study 2 examines risk factors for septic shock in patients with obstructive pyelonephritis. Case study 3 describes a rare case of a urinary tract infection caused by Salmonella in a otherwise healthy child. The document provides details on these cases and on acute pyelonephritis to aid medical practitioners.