Volume 34, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



An indirect enzyme-linked immunosorbent assay (ELISA) was developed for the detection of in human feces, using both a monoclonal antibody and rabbit antisera. It detected from less than 1 to 57 trophozoites of 6 strains. Stool specimens were positive by ELISA in 18 of 22 (82%) patients with and in 3 of 186 (2%) of patients without demonstrable in their stools. The latter included one from a child living near an asymptomatic cyst carrier and another from a traveler with giardiasis who had recently taken antibiotics. One hundred eight of 183 microscopy- and ELISA-negative specimens contained other parasites including (49 specimens), (24), (21), (2), and (1). This ELISA for is a simple, sensitive and specific diagnostic tool.


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