Antibiotic resistance turns up in Australian horses - Vet Practice Magazine

Australian researchers have uncovered a concerning development in the global fight against antibiotic resistance: a genetic mutation in the bacterium Pseudomonas aeruginosa (P. aeruginosa) causing drug resistance in Australian horses. A University of the Sunshine Coast (UniSC) study, published in Scientific Reports on June 9, 2026, revealed this mutation confers resistance to a commonly used antibiotic, highlighting a critical threat to both equine and human health given P. aeruginosa status as a World Health Organization (WHO) priority pathogen. The discovery intensifies the urgency for robust antimicrobial stewardship, a call already amplified by recent national initiatives. In April 2026, Australia launched the Animal Antimicrobial Stewardship Framework, spearheaded by CSIRO, to standardize best practices across animal sectors. This builds on the Australian Veterinary Association (AVA) landmark Antimicrobial Prescribing Guidelines for Horses, released in September 2025, which aimed to equip clinicians with science-based solutions. These domestic efforts operate within the broader context of Australia's Animal Sector Antimicrobial Resistance Action Plan 2023-2028, currently undergoing a mid-term review in 2026, underscoring a multi-faceted approach to a problem that a June 3, 2026 UN report warns could see livestock antibiotic use rise by a third globally in the next 15 years. Looking ahead, the presence of resistant P. aeruginosa in horses, animals often in close contact with humans, demands immediate and enhanced surveillance, especially under the 'One Health' framework that recognizes the interconnectedness of human, animal, and environmental health. The Department of Agriculture, Fisheries and Forestry (DAFF) is set to finalize a business case in June 2026 for sustainable funding of national AMR priority actions, which will be crucial for guiding future investments in mitigating these risks. Veterinary practices face increasing pressure to adopt stringent prescribing protocols, with the ongoing risk of common infections becoming untreatable posing significant implications for animal welfare and public health globally.