A single case of H5N1 avian influenza has been confirmed in a person in Louisiana. The case marks the first human infection in the state.
The Louisiana Department of Health has confirmed a single case of highly pathogenic avian influenza ( H5N1 ) in a person older than 65 with underlying medical conditions. The individual contracted the virus through exposure to both wild birds and a noncommercial backyard flock. This marks the only known human case of H5N1 in the state. The department has found no additional cases or evidence of person-to-person transmission.
The CDC analyzed virus specimens collected from the Louisiana patient and compared their sequences with those from dairy cows, wild birds, and poultry in various parts of the United States infected with H5N1. The patient was infected with the D1.1 genotype of the H5N1 virus, which, while related to viruses found in recent human cases in Washington and British Columbia, is distinct from the widely spreading B3.13 genotype linked to outbreaks in animals and sporadic human cases in the US. Despite some changes observed between the virus in the Louisiana patient and samples from poultry on the patient's property, the CDC considers these changes less concerning in a human host. Further sequencing is underway. The risk to the general public remains low, but individuals working with or recreationally exposed to birds, poultry, or cows are at increased risk. The CDC and Louisiana Department of Health advise avoiding direct contact with wild birds or potentially infected animals, avoiding dead animals, and keeping pets away from sick or dead animals and their feces
H5N1 Avian Influenza Louisiana Public Health Virus
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