Background Visceral leishmaniasis, usually caused by Leishmaniadonovani, has rarely been reported from eastern Saudi Arabia,so it was not expected to affect the soldiers of Operation DesertStorm.
Methods We evaluated eight soldiers with visceral leishmanialinfection, examining their serum with an immunofluorescent-antibodyassay, examining their marrow or biopsy tissue for amastigoteswith an indirect immunofluorescent-monoclonal-antibody assay,and culturing the parasites. Cultured promastigotes were isolatedand characterized by isoenzyme analysis.
Results None of the eight soldiers had classic signs or symptomsof visceral leishmaniasis (kala-azar). Seven soldiers had unexplainedfever, chronic fatigue, malaise, cough, intermittent diarrhea,or abdominal pain that began up to seven months after they returnedto the United States; one had no symptoms. Five had adenopathyor mild, transient hepatosplenomegaly. None had cutaneous manifestations.Diagnoses were made by bone marrow aspiration (seven patients)or lymph-node biopsy (one patient). Six isolates have been identifiedas L. tropica, which usually causes only cutaneous disease.Of the six patients treated with sodium stibogluconate, fiveimproved and one remained symptomatic.
Conclusions L. tropica can produce visceral infection that cancause unexplained systemic illness in persons returning fromareas where this organism is endemic.
Source Information
From the Infectious Disease Section, Walter Reed Army Medical Center (A.J.M., R.A.G., W.S., C.N.O.), and the Division of Experimental Therapeutics, Walter Reed Army Institute of Research (M.G.), both in Washington, D.C. The opinions or assertions herein are the private views of the authors and are not to be construed as official or as reflecting the views of the Departments of the Army or the Air Force or the Department of Defense.
Address reprint requests to Dr. Magill at the Department of Immunology, Walter Reed Army Institute of Research, Washington, DC 20307-5100.
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