AJTMH Transactions of the Royal Society of Tropical Medicine and Hygiene
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Am. J. Trop. Med. Hyg., 30(3), 1981, pp. 645-652
Copyright © 1981 by The American Society of Tropical Medicine and Hygiene

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Hydatid Disease in Ethiopia: Clinical Survey with Some Immunodiagnostic Test Results

George K. Fuller* AND Diane C. Fuller
Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia

After surveying various regions of Ethiopia using clinical examinations, filter paper indirect hemagglutination (IHA) test, and hydatid skin test, a hyperendemic focus of hydatid disease (Echinococcus granulosus) was found in southwestern Ethiopia. Two tribes, the Dassanetch and Nyangatom, in the lower Omo River Valley were found to have a particularly high prevalence of the disease. Of 1,342 individuals from these two tribes 4.8% had palpable abdominal cysts and 15% had hepatomegaly. This contrast with 0.2% and 5.6%. respectively, for all other groups combined. Among the Dassanetch and Nyangatom, 6.4% had filter paper indirect hemagglutination titers of 1:128 or greater versus only 0.3% for the combined results of other tested Ethiopian groups. Of 366 Dassanetch and Nyangatom, 31.7% were positive by the hydatid skin test versus 5.9% for all other southwestern Ethiopian tribes tested. Marked sex differences in hydatid skin test positivity, not reflected in the clinical findings or the IHA results, limit the use of this test for hydatid disease and suggest the possibility that men may be exposed more frequently than women to other antigens crossreacting with the hydatid skin test antigen.

Accepted for publication November 29, 1980.


* Present address: Helping Hands: The Association for Advancement of Health and Habitat, 4091 Lincoln Avenue, Oakland, California 94602.






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Copyright © 1981 by the American Society of Tropical Medicine and Hygiene.