Abstract：
:Genetic analysis of the complete haemagglutinin (HA) gene of fourteen Nigerian avian influenza isolates showed multiple basic amino acids at the cleavage site (321PQRERRRK del R*GLF333), characteristic of highly pathogenic avian influenza (HPAI). Substitution of Gln to Lys at position 322 (H5-specific numbering) was identified in one isolate. In some isolates, amino acid substitutions were observed across the HA gene, however the receptor binding, antigenic and glycosylation sites were conserved in all. Phylogenetic analysis revealed two clusters of the HPAI H5N1 clade 2.3.2.1c. Cluster I has close genetic relatedness (97.8-99.8%) with viruses circulating in some West Africa countries. Cluster II shared close identity (98.9-100.0%) with isolates from Europe, Côte d'Ivoire and Niger and viruses from this cluster were detected in five of the eleven states investigated in Nigeria. In view of the continuous HPAI outbreaks being recorded in Nigerian poultry and the zoonotic potential of the virus, extensive and continued characterization of HPAI isolates is advocated.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Shittu I,Meseko CA,Gado DA,Olawuyi AK,Chinyere CN,Anefu E,Solomon P,Okewole PA,Shamaki D,Joannis TMdoi
10.1007/s00705-016-3149-4subject
Has Abstractpub_date
2017-03-01 00:00:00pages
841-847issue
3eissn
0304-8608issn
1432-8798pii
10.1007/s00705-016-3149-4journal_volume
162pub_type
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