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Background Chicken erythrocytes are involved in immunity through binding of toll-like receptors (TLRs) with their ligands to activate downstream signaling and lead to cytokine production in erythrocytes. Some avian β-defensins (AvBDs) are constitutively expressed in tissues and some others can be induced by various bacteria and viruses. However, the expression of AvBDs in erythrocytes has not yet...
Worldwide dissemination of reassortant variants of H5 clade 2.3.4.4 highly pathogenic avian influenza (HPAI) viruses has posed a great threat to the poultry industry. Here, we systematically characterized the H5N2, H5N6 and H5N8 influenza viruses in poultry and compared them with those of previous clade 2.3.4 H5N1 virus. All the three H5 subtype reassortants caused systematic infection in ducks, and...
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