scFv against HSP60 of Strongyloides sp. and Its Application in the Evaluation of Parasite Frequency in the Elderly.
Dis Markers
; 2020: 4086929, 2020.
Article
em En
| MEDLINE
| ID: mdl-32399087
ABSTRACT
The present study is aimed at evaluating serological method using scFv anti-Strongyloides sp. and reporting the frequencies of the results with conventional parasitological technique (faeces) in elderly individuals. Among 112 elderly individuals (≥60 years of age), 14.28% were positive for at least one enteroparasite, with one individual positive for S. stercoralis. Sera were evaluated for the presence of anti-Strongyloides sp. antibodies using total or detergent fraction extracts of Strongyloides venezuelensis, which presented positivity rates of 19.64% and 10.71%, respectively. An anti-HSP60 single-chain variable fragment from Strongyloides sp. was used to detect parasite antigens, with 5.36% (6 individuals) of ELISA-positive individuals returning a positive result. While the serological test indicates previous or recent infection and may be limited by antigen purification, the anti-HSP60 method reflects the presence of Strongyloides sp. immune complexes and exhibits greater sensitivity and specificity. Our results demonstrate the variable occurrence of enteroparasites in elderly individuals residing in long-term nursing homes and validate a novel epidemiological tool to describe infection cases by Strongyloides sp.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Estrongiloidíase
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Anticorpos Anti-Helmínticos
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Chaperonina 60
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Anticorpos de Cadeia Única
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Complexo Antígeno-Anticorpo
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Antígenos de Helmintos
Tipo de estudo:
Diagnostic_studies
Limite:
Aged
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Aged80
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Animals
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Female
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Humans
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Male
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Middle aged
País como assunto:
America do sul
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Brasil
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article