The ingredients simply do not match the label claims.
The researchers, led by Bruce Hanner, found that five out of 15 sausage packages listed as turkey were entirely chicken.
Out of 27 beef sausage packages tested, seven samples also contained pork.
Among 20 chicken sausage packages, four also contained turkey and one contained beef.
And of the 38 pork sausage packages tested, two contained beef and one contained horse meat.
Products were considered contaminated when more than 1 percent of another meat was detected.
This, says the research team, ruled out trace amounts that might have resulted from incomplete cleaning of processing equipment.
The team used DNA and PCR (polymerase chain reaction) technology to detect ingredients. They didn’t extend their checking to other possible contaminants.
They say you really don't want to know what goes into sausages, but, then again, maybe you do, especially if you are trying to adhere to Jewish or Muslim dietary standards.