Species authentication needs to connect DNA findings with the product flow

A paper published on 9 November assessed meat sold as goat meat in Addis Ababa using PCR with species-specific primers targeting the mitochondrial COI gene. Of 427 raw-meat samples collected from licensed butcheries, 368 showed goat DNA. Five samples contained undeclared horse DNA, while 54 results could not be conclusively classified because no amplification occurred.

The five findings do not justify extrapolating a reliable substitution rate for the market as a whole. The publication itself explains that the small number of horse-positive results did not permit a statistical assessment of associated factors. Nor was the proportion of horse meat quantified: the method used gives a qualitative answer as to whether DNA of the target species is detected.

That is precisely where the research has practical value. Visual inspection of raw meat cannot guarantee species identity, and the survey showed that meat handlers had limited ability to identify adulteration from appearance alone. For products carrying species claims, religious restrictions or dietary requirements, authenticity therefore requires a system combining batch identification, risk-based sampling and validated analytical methods.