Performance of POC-CCA® in diagnosis of schistosomiasis mansoni in individuals with low parasite burden
Rev. Soc. Bras. Med. Trop
;
49(3): 341-347, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-785789
ABSTRACT
Abstract INTRODUCTION:
Schistosomiasis, caused by Schistosoma mansoni, is a public health concern in Brazil. However, the most popular diagnostic method, the Kato-Katz technique, exhibits low sensitivity in low-endemicity areas. We aimed to compare the performance of an immunological assay, the point-of-care circulating cathodic antigen (POC-CCA®) test, with that of two parasitological techniques in a low-endemicity population.METHODS:
Our study included 141 individuals living in Estreito de Miralta, Minas Gerais, Brazil. Fecal samples were obtained from all participants and analyzed for schistosomiasis using two parasitological techniques the Kato-Katz technique and the saline gradient technique. Additionally, POC-CCA® strips were utilized for testing urine samples. The results obtained by the different techniques were compared.RESULTS:
Analysis of two or 24 slides using the Kato-Katz technique resulted in a positivity rate of 10.6% (15/141) or 19.1% (27/141), respectively. The saline gradient technique yielded a positivity rate of 17.0% (24/141). The prevalence according to both parasitological techniques was 24.1% (34/141). The POC-CCA® test yielded a positivity rate of 22.7% (32/141); however, the positivity rate was merely 2.1% if trace results were considered negative. The agreements observed between POC-CCA® and the parasitological techniques were good (Kappa indexes > 0.64). The POC-CCA® test was more sensitive than the two-slide Kato-Katz technique (p < 0.05) in detecting cases of S. mansoni infection when trace results were considered positive.CONCLUSIONS:
These findings reinforce the importance of using multiple diagnostic techniques in low-endemicity areas for effective control of disease.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Schistosoma mansoni
/
Esquistossomose mansoni
/
Fezes
/
Antígenos de Helmintos
Tipo de estudo:
Estudo diagnóstico
/
Fatores de risco
Limite:
Aged80
/
Animais
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Rev. Soc. Bras. Med. Trop
Assunto da revista:
Medicina Tropical
Ano de publicação:
2016
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Fundação Oswaldo Cruz/BR
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