Study Links Climate Change to Increased Antibiotic Resistance in Salmonella

A study published in the Lancet Planetary Health journal indicates that climate change is associated with a 10% increase in antibiotic resistance genes in salmonella from 1940 to 2023. Researchers from the UK, France, Australia, Switzerland, and China analyzed over 480,000 salmonella samples from 139 countries. They found that rising temperatures and altered rainfall patterns amplify the abundance of antimicrobial resistance genes in pathogens. While the misuse and overuse of antibiotics remain the primary drivers of antibiotic resistance, the study suggests that climate change exacerbates the issue. The findings indicate that 82% of the countries studied experienced increases in antibiotic resistance genes, particularly in the Middle East, North Africa, South Asia, and sub-Saharan Africa. The authors emphasize the need for integrated climate change-mitigation policies and improved antimicrobial stewardship to address this growing health threat.