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Journal of Clinical Microbiology, 10 1995, 2653-2659, Vol 33, No. 10
SK Panda, SK Nanda, M Zafrullah, IH Ansari, MH Ozdener and S Jameel
Hepatitis E virus (HEV) is responsible for a majority of sporadic and
epidemic viral hepatitides in India and other developing countries. Even
though the genomes of four geographically distinct strains of HEV have been
cloned and sequenced, the Indian strain of HEV remains largely
uncharacterized. We have cloned and sequenced about 2.2 kb of the HEV
genome constituting the structural region from an Indian strain of HEV. The
nucleotide and amino acid sequences show a high degree of conservation with
sequences from other HEV strains. Open reading frames (ORF) 2 and 3 were
expressed in Escherichia coli as N-terminal hexahistidine epitope fusions.
The purified proteins were then used in an immunoblot assay to evaluate the
antibody status in sera from individuals from an area of high-level HEV
endemicity. The anti-ORF2 antibodies were found to be nonspecific and could
not be correlated to clinical disease. The immunoglobulin M anti-ORF3 was
found to be specific for the presence of acute disease. The implications of
these findings in HEV diagnosis and vaccine development are discussed.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
An Indian strain of hepatitis E virus (HEV): cloning, sequence, and expression of structural region and antibody responses in sera from individuals from an area of high-level HEV endemicity
Department of Pathology, All India Institute of Medical Sciences, New Delhi, India.
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