Cutaneous leishmaniasis acquired in France due to Leishmania infantum detected by Western Blot assay

Background. Localized cutaneous leishmaniasis acquired in France is rarely reported. Diagnosis usually relies on detection of leishmania on smears or by culture. Case report. A 9-year-old child living outside endemic French Mediterranean areas had long-lasting crusted papules on the face for several months. Although the lesions were suggestive of cutaneous leishmaniasis, smears and culture were negative for Leishmania. Skin biopsy showed epithelioid and giant cell granuloma, but Leishman bodies were absent. Western Blot analysis of the patient's serum revealed antobodies directed against Leishmania infantum antigens, thus confirming the diagnosis of cutaneous leishmaniasis. Intralesional injections of meglumine antimoniate yielded complete regression of lesions. Discussion. Localized cutaneous leishmaniasis in France is caused by Leishmania infantum and may be diagnosed outside endemic Mediterranean areas, following transmission from a sandfly bite during summer holidays in Southern France. Serum analysis by Western Blot assay distinguishes between clinically active and asymptomatic Leishmania infections, the latter being common in endemic areas. Western Blot analysis is useful for the diagnosis of cutaneous leishmaniasis when parasites cannot be detected by direct techniques.