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[Acute renal insufficiency in Boutonneuse Mediterranean fever: description of three cases].

Boutonneuse fever is a bacterial infection caused by Rickettsia conorii. It occurs mainly in countries around the Mediterranean basin. Most cases are benign. However severe forms with major morbidity and a high mortality risk have been described. Severe forms often involve altered mental status, hepatic cytolysis, hemostatic disturbances, pneumopathy, and kidney failure. The causes of renal complications are unclear. The purpose of this report is to describe three cases of boutonneuse fever associated with acute kidney failure due to different underlying mechanisms, i.e., acute renal function failure, acute tubular necrosis, and extracapillary glomerulonephritis. While the first two mechanisms of kidney failure have been reported frequently in association with Boutonneuse fever, extracapillary glomerulonephritis has, to our knowledge, been mentioned only once. This case supports speculation that Rickettsia conorii has a toxic effect on glomeruli.