We report the first case of proven disseminated infection due to Fusarium dimerum associated with a favorable outcome in a patient with acute leukemia and prolonged neutropenia. The patient presented persistent fever, multiple necrotic skin lesions, and bilateral pneumopathy. F. dimerum was first isolated from three blood cultures and then from a skin biopsy and a mouth wash. Microscopy of positive blood cultures showed hyphae with phialides and few curved unicellular and some rare bicellular phialoconidia, permitting immediate presumptive identification of the genus Fusarium. The patient failed to respond to conventional amphotericin B but recovered after treatment was switched to amphotericin B-lipid complex and neutrophil recovery
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