However, this was associated with a high morbidity and complication rate, including sepsis, wound infections, peritonitis, and fistulas. [emedicine.medscape.com]

[…] cases and does not increase the risk of sepsis and bacteremia. [5] Disadvantages of retrograde decompression include lack of antegrade access for radiologic studies, a smaller-caliber urinary drainage catheter than with percutaneous access, increased irritative [emedicine.medscape.com]

Community-acquired methicillin-resistant Staphylococcus aureus as a cause of rapidly progressing pyelonephritis with pyonephrosis, necessitating emergent nephrectomy. Am J Med Sci. 2009 Sep. 338(3):233-5. [Medline]. [emedicine.medscape.com]