The recent trajectory of highly pathogenic avian influenza (HPAI) in Mexico has been a rollercoaster of concern and cautious optimism, as indicated by a recent report from the World Organisation for Animal Health (WOAH). While the situation regarding HPAI in Mexican poultry is still under scrutiny by WOAH, there’s a glimmer of relief in the realm of non-poultry avian populations.
The narrative began on October 11, with the unsettling confirmation of HPAI in a wild common teal, despite its lack of clinical symptoms. Subsequently, 255 cases of HPAI were confirmed, accompanied by 242 fatalities. Among these cases, a notable hotspot emerged in a 40-hectare facility dedicated to the breeding of songbirds and ornamental birds.
However, amidst the flurry of outbreaks, there emerges a beacon of hope in WOAH’s latest proclamation. Citing Article 10.4.6 of the Terrestrial Animal Health Code, WOAH declared the resolution of HPAI in wildlife, marking more than 28 days since the last outbreak detection on January 3, 2024. This declaration underscores the importance of sustained vigilance and biosecurity measures, particularly among local poultry farmers who are urged to remain vigilant and promptly report any unusual occurrences.
In parallel, a separate report from WOAH delineates the narrative of HPAI within poultry populations. The last confirmed case in a backyard flock was on February 2 in Juanacatlán, while the commercial poultry sector witnessed its final encounter with HPAI in a flock of 54,000 laying hens in Cajame, confirmed on October 28, 2023. Though losses were incurred, decisive action, including depopulation, was taken to mitigate further spread.
Reflecting on the broader context, the 2022-24 HPAI outbreak has left its mark on 38 commercial poultry operations in Mexico, impacting a staggering 6,927,629 birds. Yet, amidst the challenges, there emerges a narrative of resilience and adaptation, underscored by collaborative efforts to combat the spread of HPAI and safeguard both poultry and wildlife populations alike.
