Abstract：
:During the peak outbreak (July-September 2009), a total 1886 patients were screened in eastern India, of which 139 (7.37%) and 52 (2.76%) were positive for pH1N1 and seasonal H1N1, respectively. Full-length HA1, NA, NS1 and PB1-F2 genes of representative strains were sequenced. Phylogenetic analysis of deduced amino acid sequences of pH1N1 strains revealed HA1 and NS1 to be of North American swine lineage, and the NA gene of Eurasian swine lineage. Consistent with previous reports, the PB1-F2 gene of pH1N1 strains was unique due to a mutation resulting in a truncated protein of 11 aa. The HA, NA and NS1 genes of H1N1/2009 strains clustered with H1N1 strains of 2000-2009, whereas a subset of strains contained a pH1N1-like truncated PB1-F2. The truncated PB1-F2 may confer the advantage of lower pathogenicity but higher replication and infectivity to the human H1N1 strains. This is the first report of seasonal H1N1/2009 strains with a pH1N1/2009-like gene segment.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Sarkar M,Agrawal AS,Sharma Dey R,Chattopadhyay S,Mullick R,De P,Chakrabarti S,Chawla-Sarkar Mdoi
10.1007/s00705-010-0842-6subject
Has Abstractpub_date
2011-02-01 00:00:00pages
207-17issue
2eissn
0304-8608issn
1432-8798journal_volume
156pub_type
杂志文章abstract：:The swine pathogen porcine circovirus type 2 (PCV2) causes significant economic damage worldwide. The PCV2 capsid (CP) residues 169-STIDYFQPNNKR-180 have been identified as a decoy epitope that diverts the host immune response away from protective epitopes. However, the decoy epitope may include important linear or co...
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