Two Spanish poultry farm workers tested positive for bird flu following an outbreak in poultry, in what appear to be the first known human infections in Spain and the second in Europe since 2003, the World Health Organization said Nov. 4.
The poultry outbreak was confirmed by authorities on Sept. 20 and there has been no evidence to date of human-to-human transmission related to this event, the WHO said.
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The infections with influenza A (H5N1) of the two workers – males aged 19 and 27 – were detected in September and October, likely triggered by exposure to infected poultry or contaminated environments at the farm in Guadalajara in central Spain.
Both men did not have any symptoms and were isolated until they tested negative. Following the poultry outbreak, all farm workers and their close contacts were tested.
Spain’s health ministry did not immediately respond to a request for comment.
Bird flu infections in humans may range from asymptomatic or mild upper respiratory infection to severe pneumonia, acute respiratory distress syndrome, shock and even death.
From 2003 to Oct. 21, 868 human cases, including the two cases in Spain, and 456 deaths have been reported globally from 21 countries, according to the WHO.
Three human cases of infection, one from the United Kingdom in 2021 and the two from Spain in 2022, have been reported in Europe to date, it said.
