Severe human case of bird flu confirmed in Louisiana, CDC says
A Louisiana resident has been hospitalized with a severe case of H5N1 bird flu, also called avian influenza A, marking the first reported instance of severe illness linked to the virus in the United States, according to the Centers for Disease Control and Prevention (CDC). The case was confirmed on Friday.
Since April 2024, 61 human cases of H5N1 bird flu have been reported nationwide. Partial genome data from the Louisiana patient’s infection shows the virus belongs to the D1.1 genotype, which has been detected in wild birds, poultry, and recent human cases in British Columbia, Canada, and Washington state. This genotype is distinct from the B3.13 genotype previously identified in dairy cows, sporadic human cases, and some poultry outbreaks in the U.S.
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Health officials believe the Louisiana patient contracted the virus after exposure to sick and dead birds in backyard flocks. This marks the first U.S. case of H5N1 bird flu tied to backyard flock exposure.
While such cases of severe illness are rare, H5N1 has caused severe infections and deaths in humans in other countries this year and in prior outbreaks. The CDC says there is no evidence of person-to-person transmission of the virus, and the immediate risk to public health remains low.
The CDC advises people with occupational or recreational exposure to infected animals to follow recommended precautions, including wearing personal protective equipment.
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H5N1 bird flu spreads through contact with infected birds’ saliva, mucus, and feces. Other animals can also shed the virus through respiratory secretions and bodily fluids, such as unpasteurized milk. Backyard flock owners, hunters, and bird enthusiasts are urged to take precautions to minimize the risk of infection.
The CDC recommends avoiding contact with sick or dead animals, especially wild birds and poultry, whenever possible. Individuals in direct contact with wild birds or sick or dead poultry should wear protective equipment and avoid touching contaminated surfaces or materials. Even wild birds that appear healthy may carry avian influenza viruses.
For more information on preventing H5N1 bird flu and safety guidelines, visit the CDC’s website.