Evidence map›Paper›PMID 22894717›Full record

ArticleVirology journal2012

Phylogenetic analysis of HDV isolates from HBsAg positive patients in Karachi, Pakistan.

Shadab Perveen, Muhammad Israr Nasir, Syed M Shahid, Abid Azhar, Obaid Yusuf Khan

Abstract read
In one paragraph

Article in Virology journal, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Trial
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Shadab PerveenThe Karachi Institute of Biotechnology & Genetic Engineering (KIBGE), University of Karachi, Karachi, Pakistan.
Muhammad Israr Nasir
Syed M Shahid
Abid Azhar
Obaid Yusuf Khan

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn spite of a high occurrence of Hepatitis Delta in the province of Sindh in Pakistan, no genetic study of Hepatitis Delta virus (HDV) isolates from this region was carried out. The aim of this study is to analyze the genetic proximity within local HDV strains, and relationship with other clades of HDV, using phylogenetic analysis.

resultsPhylogenetic analysis of nucleotide sequences of the Hepatitis Delta Antigen (HDAg) R0 region obtained in this study, showed considerable diversity among the local strains with a potential subgroup formation within clade I. The multiple sequence alignment of predicted amino acids within clade I showed many uncommon amino acid substitutions within some conserved regions that are crucial for replication and assembly of HDV.

conclusionsThe studied strains showed a range of genetic diversity within HDV clade I. There is clustering of sequences into more than one group, along with formation of potential subgroup within clade I. Clustering shows the genetic closeness of strains and indicates a common origin of spread of HDV infection. Further phylogeny-based studies may provide more information about subgroup formation within clade I and may be used as an effective tool in checking and/or preventing the spread of hepatitis D virus infection in this region.

Indexed as

Genetic VariationPhylogenyAdultCluster AnalysisFemaleHepatitis BHepatitis B Surface AntigensHepatitis DHepatitis delta AntigensHepatitis Delta VirusHumansMaleMolecular Sequence DataPakistanRNA, ViralSequence Analysis, DNAHepatitis B Surface AntigensHepatitis delta AntigensRNA, Viral

Identifiers

PMID22894717
PMCPMC3493343

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