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Brief summary

This study looked at whether antibiotic-resistant E. coli is found on beef and lamb meat sold by independent butchers in Wales. The researchers took meat samples, did lab tests and DNA sequencing, and compared the bacteria from meat with bacteria from farm animal fecal and from patients. They found that antibiotic-resistant E. coli was more common on lamb than on beef. Lamb meat bacteria were more similar to sheep fecal bacteria than to cow bacteria. Also, meat bacteria did not closely match the bacteria that cause human infections. So the researchers concluded that the risk of people getting infected with antibiotic-resistant E. coli from this type of meat in Wales is low.

Strengths

1. The study connects animals, meat, and humans together.

The authors point out that they used a "One Health" approach. This means they didn't just look at meat alone. They compared bacteria from each process of the transmission. This makes it easier to see if resistant bacteria are really moving from farms to humans through meat.

2. The study focuses on extensively farmed animals.

Many previous studies looked at intensive farms where antibiotics are used a lot. This study is different because it looks at beef and lamb from Wales, where animals are mostly raised outside on grass and get fewer antibiotics. This gives us new information that was missing before.

3. The DNA methods are very detailed.

The authors used whole-genome sequencing and compared the core genomes of the bacteria. This makes their conclusions about how bacteria are related more reliable.

Major concerns

1. The human bacteria samples does not come from Wales.

The authors used over 2,000 human samples, but those samples came from Bristol and nearby areas in England. The meat and farm samples were from Wales. So we can't really say for sure whether Welsh meat is spreading resistant bacteria to Welsh people. The authors say future studies should get human samples from the same local area.

2. Meat was sampled per butcher at a single timepoint.

The study only collected meat from each butcher one time. This means they can't see how contamination changes over time, for example in different seasons or after different slaughter batches. They agree that a longer study with repeated sampling would be needed to know if their results stay the same over time.

Competing interests

The author declares that they have no competing interests.

Use of Artificial Intelligence (AI)

The author declares that they did not use generative AI to come up with new ideas for their review.