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Applied Microbiology and Biotechnology

, Volume 98, Issue 23, pp 9805–9816 | Cite as

Detection of pork adulteration in processed meat by species-specific PCR-QIAxcel procedure based on D-loop and cytb genes

  • Hassan BarakatEmail author
  • Hoda A. S. El-Garhy
  • Mahmoud M. A. Moustafa
Methods and protocols

Abstract

Detection of pork meat adulteration in “halal” meat products is a crucial issue in the fields of modern food inspection according to implementation of very strict procedures for halal food labelling. Present study aims at detecting and quantifying pork adulteration in both raw and cooked manufactured sausages. This is by applying an optimized species-specific PCR procedure followed by QIAxcel capillary electrophoresis system. Manufacturing experiment was designed by incorporating pork with beef meat at 0.01 to 10 % substitution levels beside beef and pork sausages as negative and positive controls, respectively. Subsequently, sausages were divided into raw and cooked sausages then subjected to DNA extraction. Results indicated that PCR amplifications of mitochondrial D-loop and cytochrome b (cytb) genes by porcine-specific primers produced 185 and 117 bp pork-specific DNA fragments in sausages, respectively. No DNA fragments were detected when PCR was applied on beef sausage DNA confirming primers specificity. For internal control, a 141-bp DNA fragment of eukaryotic 18S ribosomal RNA (rRNA) gene was amplified from pork and beef DNA templates. Although PCR followed by either QIAxcel or agarose techniques were efficient for targeted DNA fragments differentiation even as low as 0.01 % (pork/meat: w/w). For proficiency, adequacy, and performance, PCR-QIA procedure is highly sensitive, a time-saver, electronically documented, mutagenic-reagent free, of little manual errors, accurate in measuring PCR fragments length, and quantitative data supplier. In conclusion, it can be suggested that optimized PCR-QAI is considered as a rapid and sensitive method for routine pork detection and quantification in raw or processed meat.

Keywords

PCR Adulteration Halal processed meat cytb gene D-loop gene QIAxcel procedure 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Hassan Barakat
    • 1
    Email author
  • Hoda A. S. El-Garhy
    • 2
    • 3
  • Mahmoud M. A. Moustafa
    • 2
    • 3
  1. 1.Food Science Department, Faculty of AgricultureBenha UniversityMoshtohorEgypt
  2. 2.Genetics Department, Faculty of AgricultureBenha UniversityMoshtohorEgypt
  3. 3.Agricultural Biology Lab., Faculty of AgricultureBenha UniversityMoshtohorEgypt

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