ISLAMABAD: The World Health Organisation (WHO) Friday released updated Bacterial Priority Pathogens List (BPPL) 2024, featuring 15 families of antibiotic-resistant bacteria grouped into critical, high and medium categories for prioritisation.
The list provides guidance on the development of new and necessary treatments to stop spread of Antimicrobial Resistance (AMR).
The updated BPPL incorporates new evidence and expert insights to guide research and development (R&D) for new antibiotics and promote international coordination to foster innovation. “By mapping the global burden of drug-resistant bacteria and assessing their impact on public health, this list is key to guiding investment and grappling with the antibiotics pipeline and access crisis," said Dr Yukiko Nakatani, WHO’s Assistant Director-General for Antimicrobial Resistance ad interim.
Since the first Bacterial Priority Pathogens List was released in 2017, threat of antimicrobial resistance has intensified, eroding efficacy of numerous antibiotics and putting many of the gains of modern medicine at risk.
The critical priority pathogens, such as gram-negative bacteria resistant to last-resort antibiotics, and Mycobacterium tuberculosis resistant to the antibiotic Rifampicin, present major global threats due to their high burden, and ability to resist treatment and spread resistance to other bacteria. Gram-negative bacteria have built-in abilities to find new ways to resist treatment and can pass along genetic material that allows other bacteria to become drug resistant as well.
High priority pathogens, such as Salmonella and Shigella, are of particularly high burden in low- and middle-income countries, along with Pseudomonas Aeruginosa and Staphylococcus aureus, which pose significant challenges in healthcare settings. Other high priority pathogens such as antibiotic-resistant Neisseria Gonorrhoeae and Enterococcus faecium, present unique public health challenges, including persistent infections and resistance to multiple antibiotics, necessitating targeted research and public health interventions.
Medium priority pathogens include Group A and B Streptococci (both new to the 2024 list), Streptococcus Pneumoniae, and Haemophilus Influenzae, which present a high disease burden. These pathogens require increased attention, especially in vulnerable populations including paediatric and elderly populations, particularly in resource-limited settings.
“Antimicrobial resistance jeopardises our ability to effectively treat high burden infections such as tuberculosis, leading to severe illness and increased mortality rates”, said Dr Jérôme Salomon, WHO's Assistant Director-General for Universal Health Coverage, Communicable and Noncommunicable Diseases.
The BPPL 2024 also emphasises the need for a comprehensive public health approach to addressing AMR, including universal access to quality and affordable measures for prevention, diagnosis and appropriate treatment of infections, as outlined in WHO’s people-centred approach to addressing AMR and core package of AMR interventions. This is crucial for mitigating AMR’s impact on public health and the economy.
Changes between the 2017 and 2024 lists: The BPPL 2024 saw removal of five pathogen-antibiotic combinations that were included in BPPL 2017, and addition of four new combinations. The fact that third-generation cephalosporin-resistant Enterobacterales are listed as a standalone item within the critical priority category emphasises their burden and need for targeted interventions, especially in low- and middle-income countries.
Carbapenem-resistant Pseudomonas aeruginosa (CRPA) infection moving from critical to high priority in BPPL 2024 mirrors recent reports of decreases in global resistance.
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