Concerns over cross-species transmission have been raised when a pig in Oregon tested positive for H5N1 avian flu, a first for the United States. Although they advise care, experts think this is a rare incidence rather than an indication of a larger risk.
For the first time in the United States, a pig has been tested positive for H5N1 bird flu virus. According to Dr. Danlyn Fick, Oregon veterinarian and program coordinator for Animal Health Branch of the USDA’s Office of Veterinary Resources, “The case occurred at a small farm with shared facilities between poultry and swine.
This does open an avenue for cross species transmission,” and the facility is placed under quarantine. Remains from the farm, however, are closely monitored by state veterinarians and the USDA for further developments.
Experts were quick to explain the implications. One of America’s most recognized infectious disease experts, Dr. Michael Osterholm, clarified that what was detected could be just a singular occurrence and not an actual infection. “It could simply be environmental contamination,” he said while calling for more data to be available before drawing a conclusion
With more than two dozen human cases this year, usually linked to contact with infected animals, the Centers for Disease Control and Prevention (CDC) has been monitoring H5N1 cases.
Because their lung cells resemble those of people, pigs are referred to as “mixing bowls” for flu viruses because they may harbor several strains of the virus, which may facilitate virus mutation.
Dr. Scott Weese, a veterinary specialist, pointed out that the case probably constitutes a “dead-end spillover” rather than a serious health danger, but he did draw attention to the possibility of cross-contamination on farms. For the time being, researchers are keeping a close eye on the virus as they examine its genetic makeup to make sure it stays isolated.
