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Comparative analysis of the diagnostic performance of crude sheep hydatid cyst fluid, purified antigen B and its subunit (12 Kda), assessed by ELISA, in the diagnosis of human cystic echinococcosis

Parasitology Research volume 108, pages 371–376 (2011)Cite this article

Abstract

The diagnosis of patients with cystic echinococcosis (CE) by means of serology has a limited support in clinical practice due to cross-reactivity with other helminthes leading to overestimation of the parasite’s true prevalence. A wealth of reports on the diagnostic performance of antigen B (AgB) has been produced. This study was designed to comparatively assess the diagnostic efficacy of crude sheep hydatid cyst fluid (HCF), AgB and its subunit (12 KDa) to detect IgG or IgG4 antibodies in CE patients’ sera using enzyme-linked immunosorbent assay (ELISA).The best diagnostic performance was obtained with anti-HCF IgG ELISA which gave 92.4% sensitivity and 92.6% specificity. Despite the low sensitivity of anti AgB IgG ELISA (84%), it gave the best specificity (94.4%) with less cross-reaction with sera of subjects infected with other parasites. In conclusion, it is recommended to use anti-HCF IgG ELISA for initial screening in large seroprevalence studies. Further analysis of positive serum samples with anti AgB IgG ELISA would allow the confirmation of true positives. Specific IgG4 ELISA may represent a complementary assay, useful as secondary confirmatory tests for patients with suspected CE and negative for total IgG ELISA.

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Affiliations

  1. Department of Parasitology, Faculty of Medicine, Ain Shams University, Ramsis St, Abbassia, 11566, Cairo, Egypt

    Gihan M. Tawfeek, Hala S. Elwakil, Laila El-hoseiny, Hala S. Thabet & Rania M. Sarhan

  2. Department of Public Health, Faculty of Medicine, Ain Shams University, Cairo, Egypt

    Wagida A. Anwar

  3. Faculty of Biotechnology, Misr University for Science and Technology (MUST), 6th of October, Egypt

    Nabil S. Awad

Authors
  1. Gihan M. Tawfeek
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  2. Hala S. Elwakil
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  3. Laila El-hoseiny
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  4. Hala S. Thabet
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  5. Rania M. Sarhan
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  6. Nabil S. Awad
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  7. Wagida A. Anwar
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Correspondence to Hala S. Elwakil.

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Tawfeek, G.M., Elwakil, H.S., El-hoseiny, L. et al. Comparative analysis of the diagnostic performance of crude sheep hydatid cyst fluid, purified antigen B and its subunit (12 Kda), assessed by ELISA, in the diagnosis of human cystic echinococcosis. Parasitol Res 108, 371–376 (2011). https://doi.org/10.1007/s00436-010-2074-9

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  • DOI: https://doi.org/10.1007/s00436-010-2074-9

Keywords

  • Schistosomiasis
  • Echinococcosis
  • Echinococcus
  • Cystic Echinococcosis
  • Cystic Echinococcosis