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Comparative Study of the Accuracy of Different Techniques for the Laboratory Diagnosis of Schistosomiasis Mansoni in Areas of Low Endemicity in Barra Mansa City, Rio de Janeiro State, Brazil

Schistosomiasis constitutes a major public health problem, with an estimated 200 million people infected worldwide. Many areas of Brazil show low endemicity of schistosomiasis, and the current standard parasitological techniques are not sufficiently sensitive to detect the low-level helminth infecti...

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Published in:BioMed research international 2015-01, Vol.2015 (2015), p.1-16
Main Authors: Pinho, João Renato Rebello, Carrilho, Flair J., Gryschek, Ronaldo Cesar Borges, Chieffi, Pedro Paulo, Gonçalves, Elenice Messias do Nascimento, Castilho, Vera Lúcia Pagliusi, Dias-Neto, Emmanuel, Sanchez, Maria Carmen Arroyo, Pinto, Pedro Luiz Silva, Alvarado-Mora, Mónica Viviana, Espírito-Santo, Maria Cristina Carvalho, Luna, Expedito José de Albuquerque
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cited_by cdi_FETCH-LOGICAL-c598t-32a26daa1d10d4e240bcdb61e3cf15587ff52deb13defb5a10defd23551944f63
cites cdi_FETCH-LOGICAL-c598t-32a26daa1d10d4e240bcdb61e3cf15587ff52deb13defb5a10defd23551944f63
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creator Pinho, João Renato Rebello
Carrilho, Flair J.
Gryschek, Ronaldo Cesar Borges
Chieffi, Pedro Paulo
Gonçalves, Elenice Messias do Nascimento
Castilho, Vera Lúcia Pagliusi
Dias-Neto, Emmanuel
Sanchez, Maria Carmen Arroyo
Pinto, Pedro Luiz Silva
Alvarado-Mora, Mónica Viviana
Espírito-Santo, Maria Cristina Carvalho
Luna, Expedito José de Albuquerque
description Schistosomiasis constitutes a major public health problem, with an estimated 200 million people infected worldwide. Many areas of Brazil show low endemicity of schistosomiasis, and the current standard parasitological techniques are not sufficiently sensitive to detect the low-level helminth infections common in areas of low endemicity (ALEs). This study compared the Kato-Katz (KK); Hoffman, Pons, and Janer (HH); enzyme-linked immunosorbent assay- (ELISA-) IgG and ELISA-IgM; indirect immunofluorescence technique (IFT-IgM); and qPCR techniques for schistosomiasis detection in serum and fecal samples, using the circumoval precipitin test (COPT) as reference. An epidemiological survey was conducted in a randomized sample of residents from five neighborhoods of Barra Mansa, RJ, with 610 fecal and 612 serum samples. ELISA-IgM (21.4%) showed the highest positivity and HH and KK techniques were the least sensitive (0.8%). All techniques except qPCR-serum showed high accuracy (82–95.5%), differed significantly from COPT in positivity P
doi_str_mv 10.1155/2015/135689
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Many areas of Brazil show low endemicity of schistosomiasis, and the current standard parasitological techniques are not sufficiently sensitive to detect the low-level helminth infections common in areas of low endemicity (ALEs). This study compared the Kato-Katz (KK); Hoffman, Pons, and Janer (HH); enzyme-linked immunosorbent assay- (ELISA-) IgG and ELISA-IgM; indirect immunofluorescence technique (IFT-IgM); and qPCR techniques for schistosomiasis detection in serum and fecal samples, using the circumoval precipitin test (COPT) as reference. An epidemiological survey was conducted in a randomized sample of residents from five neighborhoods of Barra Mansa, RJ, with 610 fecal and 612 serum samples. ELISA-IgM (21.4%) showed the highest positivity and HH and KK techniques were the least sensitive (0.8%). All techniques except qPCR-serum showed high accuracy (82–95.5%), differed significantly from COPT in positivity P&lt;0.05, and showed poor agreement with COPT. Medium agreement was seen with ELISA-IgG (Kappa = 0.377) and IFA (Kappa = 0.347). Parasitological techniques showed much lower positivity rates than those by other techniques. 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Carrilho, Flair J. ; Gryschek, Ronaldo Cesar Borges ; Chieffi, Pedro Paulo ; Gonçalves, Elenice Messias do Nascimento ; Castilho, Vera Lúcia Pagliusi ; Dias-Neto, Emmanuel ; Sanchez, Maria Carmen Arroyo ; Pinto, Pedro Luiz Silva ; Alvarado-Mora, Mónica Viviana ; Espírito-Santo, Maria Cristina Carvalho ; Luna, Expedito José de Albuquerque</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c598t-32a26daa1d10d4e240bcdb61e3cf15587ff52deb13defb5a10defd23551944f63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Adolescent</topic><topic>Adult</topic><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>Brazil - epidemiology</topic><topic>Child</topic><topic>Child, Preschool</topic><topic>Clinical Laboratory Techniques - methods</topic><topic>Clinical Laboratory Techniques - statistics &amp; numerical data</topic><topic>Colleges &amp; universities</topic><topic>Diagnosis</topic><topic>Diagnosis, Laboratory</topic><topic>Endemic Diseases - statistics &amp; 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Medium agreement was seen with ELISA-IgG (Kappa = 0.377) and IFA (Kappa = 0.347). Parasitological techniques showed much lower positivity rates than those by other techniques. We suggest the possibility of using a combination of laboratory tools for the diagnosis of schistosomiasis in ALEs.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><pmid>26504777</pmid><doi>10.1155/2015/135689</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record>
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source Wiley Online Library Open Access; ProQuest - Publicly Available Content Database
subjects Adolescent
Adult
Aged
Aged, 80 and over
Brazil - epidemiology
Child
Child, Preschool
Clinical Laboratory Techniques - methods
Clinical Laboratory Techniques - statistics & numerical data
Colleges & universities
Diagnosis
Diagnosis, Laboratory
Endemic Diseases - statistics & numerical data
Female
Gastroenterology
Humans
Immunoassay - methods
Immunoassay - statistics & numerical data
Immunology
Infant
Infections
Laboratories
Male
Medicine
Methods
Middle Aged
Parasites
Parasitic diseases
Parasitology
Population Surveillance - methods
Precipitin Tests - methods
Precipitin Tests - statistics & numerical data
Prevalence
Public health
Reproducibility of Results
Risk Assessment - methods
Schistosoma
Schistosomiasis
Schistosomiasis mansoni - diagnosis
Schistosomiasis mansoni - epidemiology
Schistosomiasis mansoni - parasitology
Sensitivity and Specificity
Young Adult
title Comparative Study of the Accuracy of Different Techniques for the Laboratory Diagnosis of Schistosomiasis Mansoni in Areas of Low Endemicity in Barra Mansa City, Rio de Janeiro State, Brazil
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