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Article Abstract
Objective: To develop a detection method of the third-stage larvae of Angiostrongylus cantonensis by real-time PCR and high-resolution melt curve analysis.
Methods: A pair of specific primers was designed based on the internal transcribed spacer 1 (ITS1) region of the nuclear ribosomal DNA of A. cantonensis. The third-stage larvae of A. cantonensis were detected by real-time PCR and high-resolution melt curve analysis. The specificity of the method was analyzed by testing DNAs of A. cantonensis, Clonorchis sinensis, and Gnathostoma spinigerum. The genomic DNA were extracted from 1 to 10 third-stage larvae of A. cantonensis, respectively, and used to identify the sensitivity of the method.
Results: This method could specifically detect A. cantonensis and the detection limit reached to one larva. No amplification curve and melt curve were found in C. sinensis and G. spinigerum.
Conclusion: Real-time PCR and high-resolution melt curve analysis show good specificity and sensitivity for detecting the third-stage larvae of A. cantonensis.
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