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Authentication of camel meat using species-specific PCR and PCR-RFLP

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Abstract

In India and some of the African countries, one of the unconventional meats receiving the latest attention in meat adulteration is camel meat. So, the objective of this study was to develop a species-specific PCR based on mitochondrial cytochrome b (CYTB) gene and a PCR-RFLP assay of mitochondrial 12S rRNA to identify camel meat in suspected samples. Known sample of camel meat, samples suspected to be from illegally slaughtered camel and known samples of cattle, buffalo, sheep, goat, pork and chicken were used in the study. DNA were extracted from all samples following spin column method and PCR amplification were carried out using both CYTB and 12S rRNA gene primers. The CYTB gene amplification produced amplicon with a size of 435 bp without any non-specific spurious amplification towards other species studied. Further, the 12S rRNA PCR products were analysed both by sequencing and by RFLP using enzyme AluI. On BLAST analysis the 448 bp sequence obtained from suspected samples showed > 99% sequence homology to previously reported Camelus dromedaries (accession no: AM 9369251.1). On AluI digestion of the 448 bp product from both known and suspected camel samples, a specific RFLP pattern with three distinct products of 90, 148 and 210 bp size were evident, which were significantly different from the pattern of cattle, sheep, goat, chicken and buffalo. Further, after in-house validation, this cost effective and rapid method of camel meat identification is placed into practice for regular screening of vetero-legal samples in the lab.

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Acknowledgements

The authors are thankful to the, Director, ICAR-National Research on Meat, Hyderabad, Telangana, India for providing the necessary facilities to carry out this study and Director, ICAR-National Research Centre on Camel, Bikaner, Rajasthan, India for providing autopsy samples for this study.

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Authors and Affiliations

  1. ICAR- National Research Centre on Meat, Chengicherla, Hyderabad, Telangana, 500092, India

    S. Vaithiyanathan, M. R. Vishnuraj, G. Narender Reddy & Ch. Srinivas

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  1. S. Vaithiyanathan
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  2. M. R. Vishnuraj
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  3. G. Narender Reddy
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  4. Ch. Srinivas
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Correspondence to M. R. Vishnuraj.

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Vaithiyanathan, S., Vishnuraj, M.R., Narender Reddy, G. et al. Authentication of camel meat using species-specific PCR and PCR-RFLP. J Food Sci Technol 58, 3882–3889 (2021). https://doi.org/10.1007/s13197-020-04849-w

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  • DOI: https://doi.org/10.1007/s13197-020-04849-w

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