An improved colorimetric PCR-based method for detection and differentiation of Entamoeba histolytica and Entamoeba dispar in feces.

Abstract:

:The epidemiological implications of the recent separation of "Entamoeba histolytica" into two separate species, pathogenic E. histolytica sensu stricto and commensal E. dispar, will not become apparent without methods of distinguishing between them which are applicable to large numbers of specimens. We have modified a PCR-based method to produce such a technique which may be completed in 1 day while still identifying 10(-1) E. histolytica and 1 to 10 E. dispar trophozoites per g of feces when present separately and 10 E. histolytica and 100 E. dispar trophozoites per g in the presence of 10(6) trophozoites per g of the other species. Applied to fecal specimens from 18 patients from which E. histolytica or E. dispar had been grown and identified to the species level by hexokinase isoenzyme analysis, the method in every case yielded the correct result. Positive and negative results are easily distinguished by eye, and we are now applying this technique to a large-scale epidemiological study of amebiasis in the eastern Mediterranean region.

journal_name

J Clin Microbiol

authors

Britten D,Wilson SM,McNerney R,Moody AH,Chiodini PL,Ackers JP

doi

10.1128/JCM.35.5.1108-1111.1997

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

1108-11

issue

5

eissn

0095-1137

issn

1098-660X

journal_volume

35

pub_type

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