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Jan 8, 2025 6:29 PM - The Canadian Press

B.C. doctors comparing H5N1 virus that infected teen with that of Louisiana patient

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This will help to assess how easily it adapts and transmits between animals and humans.(Photo: The Canadian Press)

The BC Centre for Disease Control says it is comparing the genetic features of a local teenager's avian flu case with that of a Louisiana patient who died earlier this week.

Clinical microbiologist Dr. Agatha Jassem, co-program head of the virology lab at the BCCDC Public Health Laboratory, says they want to understand how the viruses in the two cases are related to each other, as well as to viruses circulating in birds.

This will help to assess how easily it adapts and transmits between animals and humans. Both cases are related to viruses detected in wild birds and poultry. While there is no evidence of human-to-human infection in either, it's something experts are keeping an eye on.

Louisiana health officials said Monday that a patient hospitalized with severe avian flu died, marking the first H5N1 fatality in the United States. The 13-year-old remained hospitalized in Vancouver as of last week, but was no longer in intensive care.

Jassem says the U.S. patient shared one of the three genetic mutations identified in the Canadian case, which infectious disease specialists have said could make it easier for the virus to spread from person-to-person.

The lab is testing samples collected on different days with a variety of methods to determine how the mutations affect replication of the virus in human airways.

This report by The Canadian Press was first published Jan. 8, 2025. Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

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