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Free Content Assessing the validity of an ELISA test for the serological diagnosis of human fascioliasis in different epidemiological situations

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Objectives  To improve the diagnosis of human fascioliasis caused by Fasciola hepatica and Fasciola gigantica, we evaluated the diagnostic accuracy of an enzyme‐linked immunosorbent assay (ELISA), with Fasciola antigen from the adult liver fluke, for the detection of IgG against fascioliasis in human sera.

Methods  The sera of 54 fascioliasis cases, originating from three endemic areas, were used in this evaluation: (i) a hyperendemic F. hepatica area where humans usually shed a great number of parasite eggs in faeces (11 sera); (ii) an epidemic F. hepatica area where humans usually shed small amounts of parasite eggs (24 sera) and (iii) an overlap area of both Fasciola species and where human shedding of parasite eggs in faeces is usually scarce or non‐existent (19 sera). One hundred and sixty‐eight patients with other parasitic infections and 89 healthy controls were also analysed.

Results  The respective sensitivity and specificity of this assay were 95.3% (95% confidence intervals, 82.9–99.2%) and 95.7% (95% confidence intervals, 92.3–97.5%). No correlation between egg output and the OD450 values of the F. hepatica IgG ELISA test was observed.

Conclusions  This test could be used both as an individual serodiagnostic test for human fascioliasis when backed up by a compatible clinical history together with a second diagnostic technique for other cross‐reactive helminth infections, and in large‐scale epidemiological studies of human fascioliasis worldwide.
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Language: English

Document Type: Research Article

Affiliations: 1:  Departamento de Parasitología, Facultad de Farmacia, Universidad de Valencia, Spain 2:  Centro Nacional de Microbiología, ISCIII, Madrid, Spain 3:  Servicio de Microbiologia, Hospital Universitario y Politecnico “La Fe”, Valencia, Spain

Publication date: 2012-05-01

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