Bird flu strain raises alarm as virus kills South American wildlife
SAO PAULO – The deadly H5N1 bird flu virus has spread more aggressively than ever before in wild birds and marine mammals since arriving in South America in 2022, raising the risk of it evolving into a bigger threat to humans, according to interviews with eight scientists.
The strain has shown up in dozens of bird species, including some migrating species, which can spread it beyond the region, scientists told Reuters. Since the virus was first detected in Colombia in October 2022, there have been two known cases in humans on the continent, one each in Ecuador and Chile. Both came from exposure to infected birds.The World Health Organization is unlikely to raise the risk level for humans from the current "low" without evidence of human-to-human transmission or mutations adapted to human receptors, experts said.
Last November, Vanstreels came across a grim scene: hundreds of dead and rotting pups on the beach. Researchers estimate 17,400 pups died, nearly all born to the colony that year. The same mutations were found in samples collected in 2022 and 2023 in Chile and Peru, which were also hit by mass mortality of sea lions and birds.
پاکستان تازہ ترین خبریں, پاکستان عنوانات
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