The US Center for Disease Control and Prevention said this from the analysis of samples on Thursday First serious case of bird flu The mutation was not seen in samples from a backyard herd infected on the patient’s property in the country last week.
The CDC said the patient’s samples showed a mutation in the hemagglutinin (HA) gene, the part of the virus that plays a key role in attaching to host cells.
The health body said the risk to the general public from the outbreak has not changed and remains low.
Last week, the United States reported that First serious case of virus, In a Louisiana resident over the age of 65 who was suffering from severe respiratory illness.
The patient was infected with D1.1 Genotype of virus It was recently found in wild birds and chickens in the United States, not the B3.13 genotype found in dairy cows, human cases, and some chickens in several states.
The mutations seen in the patient are rare but have been reported in some cases in other countries and often during severe infection.
One of these mutations was also seen in another serious case in British Columbia, Canada.
No transmission from the patient to other individuals has been identified in Louisiana, the CDC said.
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