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Concordance of the point-of-care circulating cathodic antigen test for the diagnosis of intestinal schistosomiasis in a low endemicity area

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Infectious Diseases of Poverty 2019年第3期8卷 99-100页

作者： Sergei Rodrigo Magalhaes de Sousa Isabelle Helena Lima Dias Alvaro Luan Santana Fonseca Bianca Rodrigues Contente joyce favacho cardoso nogueira Tatyellen Natasha da Costa Oliveira Stefan Michael Geiger Martin Johannes Enk Programa de Pos-Graduacao Strictu Sensu em Biologia Parasitaria na Amazonia da Universidade do Estado do Para Tv.Perebebui2623-MarcoBelemPA 66087Brazil Laboratorio de Parasitoses Intestinais Esquistossomose e Malacologia(LPIEM)Secgao de ParasitologiaInstituto Evandro Chagas/SVS/MSAnanindeuaParaBrazil

Background:The Kato-Katz technique is recommended worldwide for the diagnosis of intestinal schistosomiasis,detecting parasite eggs in feces of infected ***,new tests have been developed in order to facilitate diagnosis,*** detection of specific antigens secreted by schistosomes,such as the circulating cathodic antigen(CCA).The aim of this study was to evaluate the performance of the point-of-care circulating cathodic antigen test(POC-CCA)compared to the Kato-Katz technique in a low prevalence area in the Amazon Region,located in the municipality of Primavera,State of Para,***:Positivity rates of the POC-CCA test and the Kato-Katz technique were *** sensitivity,specificity,accuracy and kappa coefficient were determined by comparing both *** reference standard was established using 16 Kato-Katz slides,12 of the first fecal sample,two of the second and two of the third *** study also included the concordance between POC-CCA results and different numbers and combinations of Kato-Katz ***:The prevalence of schistosomiasis according to the reference standard or POC-CCA test reached a rate of 9.4%or 23.9%,respectively,among a total of 372 *** positivity rates by the Kato-Katz technique increased from 2.4 to 9.4%,according to the increase in the number of slides examined and fecal samples colleaed.A sensitivity of 55.6%,specificity 76.9%,accuracy 76%and k coefficient of 0.06 was observed by comparing one slide of the first sample and *** 6 slides from three different samples,two slides of each,with POC-CCA resulted in a sensitivity of 583%,specificity 78.4%,accuracy 77%and k coefficient of ***,the comparison of 16 slides from three different samples with POC-CCA revealed a sensitivity of 65.7%,specificity 80.4%,accuracy 79%,and k coefficient of ***:The immunochromatographic test has the potential to be an important tool to combat schistosomiasis because of its practi

关键词： Schistosoma mansoni Kato-Katz POC-CCA Accuracy Diagnosis Low prevalence area

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