Avian Influenza

[Saviour Uyinosa]

Please note that the major Clades and Variants Affecting Poultry are Clade 2.3.4.4 (H5Nx Variants), Clade 2.3.2.1 (H5N1 Variants), Clade 2.2 (H5N1 Variants) and Clade 1 (H5N1 Variants). <div>

Thank you 👍 😊

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[Olayiwola Danso]

When discussing Clades in poultry, we often refer to the avian influenza (AI) virus variants, which have different clades affecting poultry across the world. The highly pathogenic avian influenza (HPAI) H5 and H7 strains have multiple clades, each varying in virulence and geographic spread.

Nigeria and West Africa

most Common Clades:

H5N1 (Clade 2.3.4.4) – Major outbreaks in poultry.

H9N2 – Causes low mortality but affects productivity.

Impact: High mortality, economic losses, and occasional human cases.

Control Measures: Biosecurity & vaccination, Early detection & culling.

[Saviour Uyinosa]

Well done 👍✅

[Bello Bashir Bello]

Since 2020, the H5N1 clade 2.3.4.4b has been a major concern for poultry globally, causing outbreaks in Europe, Asia, Africa, and North America. Other notable clades and variants include H5N8 and H5N6, with H5N1 (clade 2.3.4.4b) becoming predominant in Europe from 2021 onwards. <div>
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