Headline: WATT Poultry, 9/23/2026
Elizabeth Doughman reports:
Article Summary
Researchers detected highly pathogenic avian influenza (HPAI) H5N1 in stranded dolphins along Brazil's coast between November 2023 and August 2025, with the virus found in 18 of 45 dolphins tested, including two endangered or vulnerable species, representing a new conservation threat for marine mammals already facing survival pressure.
- H5N1 avian influenza was confirmed in 18 of 45 dolphins tested along three Brazilian coastal regions (Rio Grande do Sul, Rio de Janeiro, and Ceará)
- Two endangered or vulnerable species were affected: the Franciscana dolphin (vulnerable status) and Lahille's bottlenose dolphin (endangered status)
- Six dolphin species tested positive including rough-toothed dolphins, Clymene dolphins, dwarf sperm whales, and Fraser's dolphins
- Viral RNA was detected in internal tissues including cerebral, oral, intestinal, and tracheal samples, indicating actual infection rather than environmental contamination
- The findings highlight the need for continued systematic surveillance of marine mammals to monitor pathogen dynamics at the wildlife-marine interface
Other South and Central America bird flu posts:
June 2026
April 2026
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