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Two sequential PCR amplifications for detection of Schistosoma mansoni in stool samples with low parasite load

Overview of attention for article published in Revista do Instituto de Medicina Tropical de Sao Paulo, October 2012
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Title
Two sequential PCR amplifications for detection of Schistosoma mansoni in stool samples with low parasite load
Published in
Revista do Instituto de Medicina Tropical de Sao Paulo, October 2012
DOI 10.1590/s0036-46652012000500002
Pubmed ID
Authors

Maria Cristina Carvalho do Espírito-Santo, Mónica Viviana Alvarado-Mora, Pedro Luiz Silva Pinto, Flair José Carrilho, João Renato Rebello Pinho, Ronaldo Cesar Borges Gryschek

Abstract

Schistosomiasis constitutes a major public health problem, with an estimated 200 million individuals infected worldwide and 700 million people living in risk areas. In Brazil there are areas of high, medium and low endemicity. Studies have shown that in endemic areas with a low prevalence of Schistosoma infection the sensitivity of parasitological methods is clearly reduced. Consequently diagnosis is often impeded due to the presence of false-negative results. The aim of this study is to present the PCR reamplification (Re-PCR) protocol for the detection of Schistosoma mansoni in samples with low parasite load (with less than 100 eggs per gram (epg) of feces). Three methods were used for the lysis of the envelopes of the S. mansoni eggs and two techniques of DNA extraction were carried out. Extracted DNA was quantified, and the results suggested that the extraction technique, which mixed glass beads with a guanidine isothiocyanate/phenol/chloroform (GT) solution, produced good results. PCR reamplification was conducted and detection sensitivity was found to be five eggs per 500 mg of artificially marked feces. The results achieved using these methods suggest that they are potentially viable for the detection of Schistosoma infection with low parasite load.

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Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 30 September 2012.
All research outputs
#20,674,485
of 25,394,764 outputs
Outputs from Revista do Instituto de Medicina Tropical de Sao Paulo
#565
of 785 outputs
Outputs of similar age
#148,930
of 191,059 outputs
Outputs of similar age from Revista do Instituto de Medicina Tropical de Sao Paulo
#18
of 21 outputs
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