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An enzyme-linked immunosorbent assay for diagnostic detection of Taenia saginata copro-antigens in humans

Deplazes, P. ; Eckert, J. ; Pawlowski, Z. S. ; Machowska, L. ; Gottstein, B.

In: Transactions of The Royal Society of Tropical Medicine and Hygiene, 1991, vol. 85, no. 3, p. 391-396

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    Titre
    • An enzyme-linked immunosorbent assay for diagnostic detection of Taenia saginata copro-antigens in humans
    Auteur
    • Deplazes, P.. Institute of Parasitology, University of Zürich, Winterthurerstrasse 266a, CH-8057 Zürich, Switzerland
    • Eckert, J.. Institute of Parasitology, University of Zürich, Winterthurerstrasse 266a, CH-8057 Zürich, Switzerland
    • Pawlowski, Z. S.. Clinic of Parasitic and Tropical Diseases, Academy of Medicine, Poznan, Przybyszwewskiego 49, 60-355 Poznan, Poland
    • Machowska, L.. Clinic of Parasitic and Tropical Diseases, Academy of Medicine, Poznan, Przybyszwewskiego 49, 60-355 Poznan, Poland
    • Gottstein, B.. Institute of Parasitology, University of Zürich, Winterthurerstrasse 266a, CH-8057 Zürich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Transactions of The Royal Society of Tropical Medicine and Hygiene, 1991, vol. 85, no. 3, p. 391-396. Royal Society of Tropical Medicine and Hygiene
    Autre version électronique
    Classification
    • Santé
    Identifiant OAI-PMH
    • oai:doc.rero.ch:303185
    Summary
    An immunodiagnostic sandwich enzyme-linked immunosorbent assay (ELISA) was developed for the detection of soluble Taenia saginata antigens in stool samples (copro-antigens) of infected humans, using affinity-purified polyclonal antibodies obtained from rabbits hyperimmunized with excretory/secretory antigens derived from T. saginata maintained in vitro. Investigation of operating characteristics showed very low cross-reactivity with crude antigens from helminths other than Taenia, including Dipylidium caninum and Diphyllobothrium latum. The specificity of the assay was 95% when testing stool samples from 100 persons who were either infected with Ascaris lumbricoides, Trichuris trichiura, hookworms, Enterobius vermicularis or Hymenolepis nana, or who had no intestinal helminthosis detected. Analysis of diagnostic sensitivity demonstrated that in 85% of 34 samples from 23 untreated persons with intestinal T. saginata infection (selected by previous proglottid and/or egg detection) copro-antigens were detected by the T. saginata ELISA. In the same samples, Taenia eggs were detected in 62%. Only 41% of the samples reacted positively in a heterologous T. hydatigena ELISA. Post-treatment control revealed a high concentration of T. saginata copro-antigens for 1-4 d after administration of niclosamide or praziquantel, and negative values 9-17 d after treatment. The Taenia copro-antigens remained detectable by ELISA even after storage of untreated faeces at 25 °C for at least 5 d