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First U.S. Pig Infected With Bird Flu Raises Concerns

This 2005 electron microscope image shows an avian influenza A H5N1 virion. (Cynthia Goldsmith, Jackie Katz/CDC via AP, File)

An Oregon farm in Crook County recently made headlines as a pig was discovered to have contracted bird flu, marking the first known case of the virus in U.S. swine. The U.S. Department of Agriculture confirmed the infection, sparking worries about the potential threat of bird flu to humans.

The incident occurred at a backyard farm where various animals cohabitate and share resources. Following the detection of the virus in poultry at the farm, testing revealed that one of the five pigs on the premises had also been infected.

As a precautionary measure, the farm was placed under quarantine, and all five pigs were euthanized for further testing. While the farm is not a commercial operation, officials assured the public that there is no risk to the nation's pork supply.

Experts emphasized the significance of detecting bird flu in pigs, as these animals can serve as intermediaries in the adaptation of bird viruses to humans. The 2009 H1N1 flu pandemic, for instance, had origins in swine.

Genetic testing conducted by the USDA on the farm's poultry did not reveal any mutations indicating an increased risk of human transmission. Consequently, the current public health risk is deemed low.

Although a different strain of bird flu has been observed in pigs outside the U.S. previously, it did not lead to a human pandemic. Researchers underscored that the mere presence of the virus in pigs does not automatically elevate the threat level.

The Type A H5N1 bird flu strain has been circulating among various animal populations in the U.S., heightening the likelihood of human exposure. While the pig infection in Oregon is notable, experts maintain that it does not alter the overall risk assessment at this time.

As of now, nearly 40 human cases of bird flu have been reported in several states, with individuals mostly experiencing mild symptoms after contact with infected animals.

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