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Acute interstitial nephritis due to Leptospira grippotyphosa in the absence of Weil's disease.

Anicteric leptospirosis is a self-limited flu-like disease, whereas the icteric form is a severe illness characterized by multiple organ involvement or even failure. A case involving a patient with rapidly progressing renal insufficiency requiring intermittent renal replacement therapy due to Leptospira grippotyphosa in the absence of a Weil's disease is reported.