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Loiasis: "Calabar" Swellings and Involvement of Deep Organs^*

Yohannes Negesse^**,, Leo O. Lanoie, Ronald C. Neafie AND Daniel H. Connor

Armed Forces Institute of Pathology
Karawa Mission Hospital, Karawa, Zaire
Department of Infectious and Parasitic Disease Pathology and the World Health Organization Reference Laboratory for Histopathology of Filarial Diseases of Man, Armed Forces Institute of Pathology, Washington, DC 20306

The authors report clinical and histopathologic changes in six patients with symptomatic loiasis. One patient had cutaneous swellings, three patients presented with hydrocele, one patient developed bowel obstruction, and one had generalized fatal loiasis. The first five patients had localized lesions provoked by adult worms; all were surgically removed. The sixth patient died of disseminated loiasis that included a severe loal encephalitis. The authors discuss the mechanism of "Calabar" swellings, the reaction to adult Loa loa worms and loal encephalitis.

Accepted for publication November 12, 1984.

^* The opinions or assertions contained herein are the private views of the authors and are not to be construed as official or as reflecting the views of the Department of the Army or the Department of Defense.

^** Dr. Negesse was on a research fellowship to AFIP supported by WHO.

Address reprint requests to: Dr. Daniel H. Connor, Chairman, Department of Infectious and Parasitic Disease Pathology, Armed Forces Institute of Pathology, Washington, DC 20306.

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