WHO updates list of drug-resistant bacteria posing highest global health threat

The World Health Organization (WHO) has released the 2024 update to its Priority Pathogen List, identifying 15 families of antibiotic-resistant bacteria categorized by critical, high, and medium priority. This updated index aims to provide strategic guidance for global research and development (R&D) to combat the rising crisis of antimicrobial resistance (AMR).

AMR occurs when pathogens, including bacteria and fungi, no longer respond to existing medications, leading to severe health complications and increased mortality. The WHO notes that the overuse and misuse of antimicrobial drugs remain the primary drivers of this trend, which threatens to undermine decades of progress in modern medicine.

Critical threats identified include multidrug-resistant gram-negative bacteria and rifampicin-resistant Mycobacterium tuberculosis. These pathogens are classified as critical due to their ability to resist last-resort treatments and their capacity to transfer genetic resistance to other bacteria. The 2024 list also adds new entries, such as group A and B streptococci, which represent a significant health burden for vulnerable pediatric and elderly populations.

The organization emphasizes that addressing AMR requires a shift beyond pharmaceutical innovation. A comprehensive public health approach, focusing on infection prevention, universal access to diagnostic tools, and improved treatment protocols, is considered essential to curbing the global economic and health impacts of resistant pathogens.