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. 1994 Apr;32(4):964–970. doi: 10.1128/jcm.32.4.964-970.1994

Diagnosis of amebic dysentery by detection of Entamoeba histolytica fecal antigen by an invasive strain-specific, monoclonal antibody-based enzyme-linked immunosorbent assay.

A Gonzalez-Ruiz 1, R Haque 1, T Rehman 1, A Aguirre 1, A Hall 1, F Guhl 1, D C Warhurst 1, M A Miles 1
PMCID: PMC267163  PMID: 8027351

Abstract

An invasive strain-specific monoclonal antibody against Entamoeba histolytica has been used in a capture enzyme-linked immunosorbent assay (ELISA) for the detection of invasive E. histolytica fecal antigen in clinical specimens and for the diagnosis of amebic dysentery in patients from Bangladesh. The fecal antigen capture ELISA (FAC-ELISA) did not cross-react with other parasite species in the clinical specimens or with noninvasive E. histolytica present in those specimens and in experimentally seeded stools. The limit of detection of the assay for invasive E. histolytica crude antigen diluted in phosphate-buffered saline or in stools was 0.58 and 3.9 micrograms/ml, respectively, which is the equivalent of approximately 72 and 487 E. histolytica trophozoites per well, respectively. The sensitivity, specificity, and efficiency of the FAC-ELISA were 87, 100, and 98%, respectively, for the detection of invasive E. histolytica antigens and 100, 100, and 100%, respectively, for the diagnosis of amebic dysentery. The FAC-ELISA is a potential alternative for the field diagnosis of amebic dysentery and for epidemiological studies to define the distribution of invasive E. histolytica.

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Selected References

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