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  • Title: Detection of antibodies to secretions of Ancylostoma caninum in human eosinophilic enteritis.
    Author: Loukas A, Croese J, Opdebeeck J, Prociv P.
    Journal: Trans R Soc Trop Med Hyg; 1992; 86(6):650-3. PubMed ID: 1287934.
    Abstract:
    To evaluate the role of canine hookworms in human eosinophilic enteritis (EE) in north-eastern Australia, we tested human sera in an enzyme-linked immunosorbent assay (ELISA) which incorporated antigens of adult Ancylostoma caninum. Sera from the following groups were examined: 10 patients with EE (unexplained recurrent abdominal pain and related symptoms, with peripheral eosinophilia) from Townsville and Brisbane; 2 persons known to be infected with A. caninum and 20 presumed unexposed healthy controls; 20 patients with other gastrointestinal diseases; 20 with other identified parasitic infections; and 20 with atopic conditions. High levels of specific immunoglobulin (Ig) G and IgE antibodies were found in patients with EE but not other gastrointestinal disease. Excretory-secretory (ES) products were more discriminating than somatic antigens in the ELISA and the IgG/ES-ELISA was the most specific; occasional cross-reactions could be explained on epidemiological or parasitological grounds. The IgM-ELISA was neither specific nor sensitive. We conclude that canine ancylostomiasis is a major cause of human EE in north-eastern Australia, and the pathogenesis is based probably on hypersensitivity to antigens secreted by the parasite.
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