CASE REPORTS
COMPARATIVE STUDY
JOURNAL ARTICLE
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[Weil's syndrome with bone marrow involvement after collecting walnuts].

HISTORY AND CLINICAL FINDINGS: A 65 year-old man was transferred to our department from a neighbouring hospital with anuria and epistaxis. A few days prior to hospitalization, he had experienced severe muscular and joint pain accompanied by chills. A careful history revealed that, in recent weeks, the patient had frequently collected wild walnuts growing, for the most part, on the banks of a small stream, known to have an infestation of rats. The physical examination revealed pronounced jaundice of the skin and sclerae, and petechia on the lower legs.

INVESTIGATIONS: Laboratory results showed marked thrombocytopenia, hyperbilirubinaemia, appreciably elevated urine retention parameters and increased C-reactive protein. During the subsequent course of his illness, serum leptospiral antibody titres were elevated, indicating an acute leptospiral infection manifesting as Weil's syndrome. Silver staining (>>Warthin-Starry<<) revealed rod-shaped bacteria, presumably representing leptospires, in some bone marrow macrophages.

TREATMENT AND COURSE: Treatment with i. v. penicillin was immediately initiated, and urine output established by intravenous fluid resuscitation in the intensive care unit, so that haemodialysis was not necessary. The platelet count returned to normal and bilirubin began to decrease again. The patient was discharged home after 2 weeks in the hospital.

CONCLUSION: When a patient presents with the triad of renal failure, jaundice and thrombocytpenia in the setting of a possible infection, then the severe form of leptospirosis known as Weil inverted question marks syndrome must be considered, and antibiotic treatment initiated without delay. Of importance for the definitive diagnosis is the repeated determination of the titres of antibodies to leptospires in the serum and urine, which usually become positive only in the second week of the illness. In our case, we detected bacteria directly in some bone marrow macrophages as well.

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