PMID: 8600765Mar 1, 1996Paper

Evaluation of commercial enzyme immunoassay (EIA) and immunofluorescent antibody (FA) test kits for detection of Cryptosporidium oocysts of species other than Cryptosporidium parvum

The American Journal of Tropical Medicine and Hygiene
Thaddeus K GraczykR Fayer

Abstract

A commercial enzyme immunoassay (EIA) (ProSpect Rapid Assay), a direct immunofluorescence antibody (IFA) test for stool testing (MERIFLUOR Cryptosporidium/Giardia), and an indirect IFA test for environmental testing (Hydrofluor-Combo Cryptosporidium/Giardia) were evaluated for detection of low public health risk Cryptosporidium oocyst isolates, and for C. parvum oocyst isolates from human and bovine feces that represent a high public health risk. There was no cross-reactivity of EIA with ova of eight medically important helminths, three Eimeria species oocysts, Sarcocystis cruzi sporocysts, and two Candida sp. isolates. All nine snake oocyst isolates (C. serpentis), two of seven lizard oocyst isolates, one turtle oocyst isolate, two avian oocyst isolates (turkey, C. meleagridis), one C. wrairi oocyst isolate from guinea pigs, one C. muris oocyst isolate from hyrax, one heifer C. muris isolate, and two C. muris-like oocyst isolates from a camel were positive by both IFA tests; six of these 19 oocyst isolates were EIA-positive. There was no difference in the sensitivity and specificity between direct and indirect IFA tests. The sensitivity of the EIA and both IFA tests to the C. parvum oocysts was 100%. The EIA showed less cross-...Continue Reading

Citations

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