Study on resistant strains in Brazil shows exported poultry rarely causes disease in the UK

An overview of the development of salmonella Bacteria infecting Brazilian poultry shows that the introduction of a salmonella This, coupled with the increasing use of antibiotics by Brazilian farmers, has led to the emergence of strains that are more resistant to antibiotics but less likely to cause disease in humans. Andrea Micke Moreno of the University of São Paulo, Brazil, and Alison Mather of the Quadram Institute Bioscience, UK, report these findings in a new study published June 2.n / A in the open access journal PLOS genetics.

The bacterium Salmonella enterica is a common cause of foodborne illness in humans, often resulting from contaminated poultry. Brazil is the world’s largest exporter of chicken meat, and a team led by Micke Moreno and Mather wanted to find out if the strains of salmonella present in Brazil contributed to cases of food poisoning in the countries that import their products. The researchers compared the genomes of 183 salmonella collected from chickens in Brazil and 357 salmonella Genomes of humans, domestic fowl and Brazilian poultry products imported into the UK. They also examined more than 1,200 publicly available genomes of the two main types of salmonella found in Brazil to see what they could learn about the evolution of Brazilian strains.

The team discovered that the two main lines are separate salmonella Types developed in Brazil in the early 2000s, around the same time the country introduced a salmonella vaccine for poultry. These bacteria have genes that make them resistant to three types of antibiotics. But despite their rise in Brazil, these antibiotic-resistant bacteria have caused very few cases of salmonella in humans in the UK and have not spread to domestic chickens.

Overall, these results suggest that the use of salmonella Vaccine in Brazil and the increased use of antibiotics have allowed the emergence of drug-resistant forms salmonella, but that these bacteria have not led to more cases of food poisoning in the UK. The researchers point out that their assessment of salmonella Genomes from a range of sources in Brazil and the UK underscore the importance of a “One Health” approach to disease that encompasses collaborative and multidisciplinary efforts to improve human, animal and environmental health.

Mather adds: “Through our genomic sleuthing, we have tracked how changes in chicken farming in Brazil have altered the profile of Salmonella bacteria circulating in the poultry industry. Although the bacteria did not pose an immediate health risk to importing countries such as the UK, they were resistant to antimicrobial drugs, underscoring the importance of a “One Health” approach that recognizes the links between human, animal and environmental health, particularly in the assessment of global food supply chains.

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