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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Most common infectious agent associated with chronic pyelonephritis is:
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The correct answer is  Chronic pyelonephritis: Bacteriological examination of the urine reveals: E.Coli ( most common ) Proteus species Streptococcus faecalis Pseudomonas species Microscopic features: Tubular thyroidization (filled with colloid casts) Interstitial fibrosis and inflammation Obliterative endaeritis of vessels