Pig products are a staple in many diets, providing a rich source of protein. However, they might also be carrying unexpected hitchhikers: viruses. A recent study dug into this issue, focusing on pig livers meant for human consumption. The investigation involved collecting 140 liver samples from 14 different pig farms in Rio Grande do Sul, Brazil. The goal was to see if these livers could be harboring viruses that typically affect pigs.

The results were eye-opening. A significant number of samples, 93 out of 140, tested positive for a virus called swine torque teno virus (TTSuV). This virus comes in two main types, TTSuV1 and TTSuV2. The study found that some samples had one type, others had the other, and a few had both. This shows that these viruses are quite common in pig populations.  Another virus, porcine circovirus type 2 (PCV2), was also found in 24 samples. Most of these were a specific subtype called PCV2d, with only one sample containing PCV2b.

The study didn't stop there. It also looked for adenoviruses (AdV), which can infect various animals. Out of the samples tested for adenoviruses, 44 were positive. These viruses were of human, canine, and bird origins. This raises questions about how these viruses end up in pig livers. Additionally, porcine parvovirus (PPV) DNA was detected in 5 out of 70 samples. This virus is known to cause reproductive issues in pigs.

So, what does this mean for consumers? Pork liver is a key ingredient in many processed meats like pate, sausages, and mortadella. The presence of these viruses in raw liver samples suggests that they could potentially make their way into these products. While further processing usually inactivates viruses, there's still a risk, especially for people with weakened immune systems. This study highlights the need for better monitoring and perhaps stricter regulations to ensure the safety of pork products. It's a reminder that what we eat can have hidden risks, and it's crucial to stay informed and vigilant.

Pig Livers: A Hidden Risk in Your Favorite Meats

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