Open AccessSequence analysis and biological characterization of virulent Avian avulavirus 1 isolated from asymptomatic migratory fowl
Author(s) -
Aziz UlRahman,
Tahir Yaqub,
Mohamed Imran,
Md. Ahasan Habib,
Tariq Sohail,
Nizar A. Mukhtar,
Muhammad Furqan Shahid,
Muhammad Munir,
Muhammad Zubair Shabbir
Publication year - 2019
Publication title -
acta virologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.412
H-Index - 33
eISSN - 1336-2305
pISSN - 0001-723X
DOI - 10.4149/av_2019_208
Subject(s) - biology , virulence , genotype , phylogenetic tree , fowl , genetics , virology , waterfowl , influenza a virus subtype h5n1 , clade , sequence analysis , neuraminidase , gene , genetic analysis , virus , ecology , habitat
Continuous monitoring and surveillance of avian avulaviruses (AAvVs) in water/migratory fowl is imperative to ascertain the evolutionary dynamics of these viruses. Here, we report genomic and amino acid characteristics of two AAvVs strains isolated from asymptomatic waterfowl (Anas carolinensis). Sequence characteristics including the presence of virulent motif (112RRQKR↓F117) and biological assessment confirmed the virulent nature of study isolates. Phylogenetic analysis of complete fusion (F) and hemagglutinin-neuraminidase (HN), and hyper-variable region of F gene revealed clustering of both strains within genotype VII and sub-genotype VIIi. The inferred residue analysis of complete F and HN genes revealed a number of substitutions in functionally and structurally important motif/s compared to reference strains of each genotype (I-XI). This study concludes an evolutionary nature of avian avulavaris 1 (AAvV-1), ascertaining continuous surveillance of migratory fowl to better elucidate their infection, epidemiology and subsequent impacts on commercial and backyard poultry. Keywords: virulent AAvV-1; migratory fowl; genetic characterization; evolutionary analysis; Pakistan.