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Abstract
Background:
Enteroviruses are known as major pathogen for aseptic meningitis. Although rapid diagnosis for enteroviruses is very essential to exclude bacterial infections in patients with meningitis, classical diagnostic method based on virus isolation is not practicable for timely treatment of patients due to its laborious and time-consuming procedure. Recently molecular methodologies as alternatives are routinely used for rapid and sensitive diagnosis for enteroviruses infections.
Methods:
Reverse transcription (RT)-PCR ELISA kit for targeting 5' non-coding region (NCR) with highly conserved genetic identity among all genotypes of enteroviruses was introduced in this investigation. RT-PCR ELISA was evaluated about sensitivity and specificity through virus isolation using clinical specimens from patients suspected of enteroviral infections and enteroviral isolates comparing with conventional RT-PCR identifying them.
Results:
The detection limit of the RT-PCR ELISA was up to 10-100 folds higher than virus isolation using cell culture and conventional RT-PCR. On comparison between above two methods, the detection rate of RT-PCR ELISA for clinical specimens from patients with aseptic meningitis was 7% higher than that of conventional RT-PCR targeting 5' NCR (P=0.016).
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Fig. 1.
The schematic design of PCR ELISA reaction applied in this study
Abbreviations: HRP, horseradish peroxidase; Yellow P, phosphate; B, biotin; Purple P, horseradish peroxidase.
Fig. 3.
The comparative results of sensitivity for various assays for the detection of enteroviruses. ⬇, Detection limit; +, Relative low; ++, Moderate; +++, High.
Abbreviations: TCID50, Tissue Culture Infections Dose 50; RT-PCR, reverse transcription-PCR; OD, optical density.
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