Identification and differentiation of Fasciola hepatica and F. gigantica using multiplex PCR technique
Keywords:
Fasciola hepatica, Fasciola gigantica, multiplex PCR, PCR-RFLPAbstract
We aimed to present an alternate method instead of PCR-RFLP and also develop an optimized method for rapid, time-saving and affordable molecular-based approach to discriminate species of liver fluke, Fasciola hepatica and F. gigantica. Seventy-six samples of F. hepatica and 28 F. gigantica were collected from the slaughterhouses of endemic regions in Iran. Following a comprehensive analysis of the mitochondrial complete sequences of both F. hepatica and F. gigantica, the extracted DNAs from all samples were used as templates in multiplex PCR reactions containing two sets of primers specific for cytochrome c oxidase I (cox I) gene of both species. In a parallel experiment, PCR-RFLP was performed for each sample using internal transcribed spacer (ITS1) sequence. Furthermore, following a PCR amplification for cox I gene, the amplicons were purified for sequencing. To assess the validity of the multiplex PCR approach, the obtained data from the multiplex PCR and PCR-RFLP experiments were compared with each other. By sequence analysis of 104 samples, 76 and 28 samples were identified as F. hepatica and F. gigantica, respectively. Results revealed 100% and 92% of accuracy as for multiplex PCR and PCR-RFLP. The designed multiplex PCR strategy offers a valid alternative approach to the conventional methods with distinctive features including convenience, cost-effectiveness, time-saving (3 hours from sampling to obtain final results) and high efficacy.References
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