<prompt> The common organism isolated in Emphysematous pyeloneohritis isE. ColiProteusPseudomonasKlebsiella  <response>: Emphysematous pyelonephritis EPN is a severe, necrotizing infection of the renal parenchyma causing gas formation within the collecting system, renal parenchyma, andor perirenal tissues. Also called renal emphysema and pneumonephritis. Gas in the renal pelvis alone, without parenchymal gas, is often referred to as emphysematous pyelitis.EPN most often occurs in persons with diabetes mellitus, especially women.Among the bacteria associated with emphysematous pyelonephritis EPN, Escherichia coli is isolated in 66 of patients, and Klebsiella species are repoed in 26 of patients. Proteus,Pseudomonas, and Streptococcus species are other organisms found in patients with EPN, and Entamoeba histolytica and Aspergillus fumigatus also have been repoed to cause the disease. Mixed organisms are observed in 10 of patients. Rare organisms such as Clostridium and Candida species have also been isolated in patients with EPN. 