Multiplex PCR and 12S rRNA gene sequencing for detection of meat adulteration: A case study in the Egyptian markets

•Meat adulteration has become a critical case, worldwide.•Frozen liver samples were correctly identified through 12S rRNA gene sequencing.•Multiplex PCR revealed that processed beef samples contained poultry contaminants.•Sequencing and mPCR are sensitive methodologies for controlling meat industry.