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Evaluation of experimental conditions for quantification of LT produced by human derived enterotoxigenic Escherichia coli strains BJM
Lasaro,Melissa Ang-Simões; Rodrigues,Juliana Falcão; Cabrera-Crespo,Joaquim; Sbrogio-Almeida,Maria Elisabete; Lasaro,Marcio de Oliveira; Ferreira,Luís Carlos Souza.
The heat-labile toxin (LT) is a key virulence-associated factor associated with the non-invasive secretory diarrhea caused by enterotoxigenic Escherichia coli (ETEC) strains either in humans or domestic animals. Several LT detection methods have been reported but quantification of the toxin produced by wild-type ETEC strains is usually performed by the GM1 ganglyoside enzyme-linked immunosorbent assay (GM1 ELISA). In this study we conducted the optimization of an alternative LT-quantification method, the antibody-capture ELISA (cELISA). Detailed analysis of the appropriate dilutions of capture and detecting LT-specific antibodies significantly improved the sensitivity of the method. Additionally, testing of different LT extraction techniques indicated that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heat-labile toxin; LT; ETEC; CELISA.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300012
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