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- W2791091301 abstract "The early detection of Shiga toxin-producing Escherichia coli (STEC) is important for early diagnosis and preventing the spread of STEC. Although the confirmatory test for STEC should be based on the detection of Shiga toxin using molecular analysis, isolation permits additional characterization of STEC using a variety of methods, including O:H serotyping. The conventional slide agglutination O-antigen serogrouping used in many clinical laboratories is laborious and time-consuming. Surface plasmon resonance (SPR)-based immunosensors are commonly used to investigate a large variety of bio-interactions such as antibody/antigen, peptide/antibody, DNA/DNA, and antibody/bacteria interactions. SPR imaging (SPRi) is characterized by multiplexing capabilities for rapidly screening (approximately 100 to several hundred sensorgrams in parallel) molecules. SPRi-based O-antigen serogrouping method for STEC was recently developed by detecting the interactions between O-antigen-specific antibodies and bacterial cells themselves. The aim of this study was to evaluate its performance for E. coli serogrouping using clinical STEC isolates by comparing the results of slide agglutination tests. We tested a total of 188 isolates, including O26, O45, O91, O103, O111, O115, O121, O128, O145, O157, and O159. The overall sensitivity of SPRi-based O-antigen serogrouping was 98.9%. Only two O157 isolates were misidentified as nontypeable and O121. The detection limits of all serotypes were distributed between 1.1 × 106 and 17.6 × 106 CFU/ml. Pulsed-field gel electrophoresis (PFGE) revealed the heterogeneity of the examined isolates. In conclusion, SPRi is a useful method for the O-antigen serogrouping of STEC isolates, but the further evaluation of non-O157 minor serogroups is needed." @default.
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- W2791091301 date "2018-06-01" @default.
- W2791091301 modified "2023-09-30" @default.
- W2791091301 title "Evaluation of a surface plasmon resonance imaging-based multiplex O-antigen serogrouping for Escherichia coli using eleven major serotypes of Shiga -toxin-producing E. coli" @default.
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- W2791091301 doi "https://doi.org/10.1016/j.jiac.2018.01.008" @default.
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