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["Peculiar infection" with fever, splenomegaly and acute kidney failure in a 24-year-old forestry student].

When confronted by the combination of initial high fever associated with intense malaise, splenomegaly, elevated levels of transaminases, and acute renal failure, consideration must be given to the differential diagnosis of leptospirosis even in Germany. As a rule, the diagnosis is confirmed by serological testing based on the titer curve. Renal involvement is frequent, but usually has a good prognosis, especially if jaundice has not developed. Treatment with doxycycline or penicillin can shorten the disease course and exudation, possibly also the nephritis, or hinder it.