Influenza activity in US shows another jump, first two pediatrician deaths reported
Influenza activity in the United States jumped again the week ending Dec. 18, with eight states reporting high or very high activity and the first two pediatric flu deaths reported for the season, the people said today. United States Centers for Disease Control and Prevention (CDC) in their regular update. .
Most influenza markers have shown consistent increases, with the eastern and central states seeing the largest increases, with H3N2 being the dominant strain and infections continuing to affect a wider range of groups. adulthood after diseases targeted the young earlier in the season.
States or jurisdictions reporting high or very high activity – a marker that reflects clinic visits for influenza-like illness – include New Mexico, Kansas, North Dakota, Indiana, Tennessee, Georgia, New Jersey and the District of Columbia. The CDC said other respiratory viruses are circulating and may influence influenza-like illness patterns.
Hospitalizations are starting to increase and 1,265 people have been admitted to hospital with laboratory-confirmed influenza in the week ending December 18. 11. The other occurred the following week and was related to untyped influenza A.
The CDC also provided its first genetic characterization of the influenza virus, noting that most H3N2 viruses are closely related to the vaccine strain, but some antigenic differences emerge as H3N2 viruses continue to evolve.
Dec. 27 CDC FluView
Canada, Portugal and Taiwan report outbreaks of H5 in birds.
In the latest developments regarding avian influenza, Canada reported an outbreak of highly pathogenic H5N1 in captive birds at a multispecies show farm in the insular part of Newfoundland and Labrador, and Portugal reported more H5N1 in poultry.
The Canadian Food Inspection Agency confirmed H5N1 after the farm suffered sudden bird death for several days. The event is considered a non-poultry event and the establishment does not produce birds for sale.
The outbreak in Portugal began on December 22 at a commercial turkey farm in the Leiria region, killing 1,459 of 18,100 birds, according to a notification from the World Organization for Animal Health (OIE).
Elsewhere, Taiwan has reported highly pathogenic H5N2 events in poultry and wild birds, according to separate OIE advisories. There have been nine outbreaks of poultry, mostly on farms, but also at one slaughterhouse and at a site where discarded chickens were found. Outbreaks occurred in different locations during November and December, and taken together, the virus killed 2,755 of 66,408 susceptible birds. Taiwan has also reported separate detections of H5N2 and H5N1 in wild birds.
Dec 22 CFIA declaration
Dec 24 OIE report on H5N1 in Portugal
Dec 24 OIE report in H5N2 in Taiwanese poultry
Dec 24 OIE report on H5N2 in Taiwanese wild birds
23 dec. OIE report on H5N1 in Taiwanese wild birds
In its latest bird flu snapshot, the European Center for Disease Prevention and Control (ECDC) said that between September 18 and December 8, 27 countries in the European Union and the United Kingdom reported 867 highly pathogenic detections in poultry, wild and captive birds. Italy recorded the highest number of events in poultry, followed by Hungary and Poland.
He said frequent forays into poultry flocks raised concerns about biosecurity gaps. Genetic analysis shows that the viruses belong to the 220.127.116.11b clade. Tests suggest that H5N1 viruses in Sweden, Germany, Poland and the UK have been circulating in Europe since October 2020. However, viruses from northern, central and eastern Europe have a new reassortant that was introduced in October. 2021.
Additionally, H5N1 has been found in mammals in Sweden, Estonia and Finland, and in some cases the viruses have an adaptive marker associated with increased virulence and replication in mammals.
Dec 22 ECDC report