A novel virus in swine is closely related to the human hepatitis E virus

A novel virus, designated swine hepatitis E virus (swine HEV), was identified in pigs. Swine HEV cross-reacts with antibody to the human HEV capsid antigen. Swine HEV is a ubiquitous agent and the majority of swine greater than or equal to 3 months of age in herds from the midwestern United States w...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 1997-09, Vol.94 (18), p.9860-9865
Hauptverfasser: Meng, X.J, Purcell, R.H, Halbur, P.G, Lehman, J.R, Webb, D.M, Tsareva, T.S, Haynes, J.S, Thacker, B.J, Emerson, S.U
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container_end_page 9865
container_issue 18
container_start_page 9860
container_title Proceedings of the National Academy of Sciences - PNAS
container_volume 94
creator Meng, X.J
Purcell, R.H
Halbur, P.G
Lehman, J.R
Webb, D.M
Tsareva, T.S
Haynes, J.S
Thacker, B.J
Emerson, S.U
description A novel virus, designated swine hepatitis E virus (swine HEV), was identified in pigs. Swine HEV cross-reacts with antibody to the human HEV capsid antigen. Swine HEV is a ubiquitous agent and the majority of swine greater than or equal to 3 months of age in herds from the midwestern United States were seropositive. Young pigs naturally infected by swine HEV were clinically normal but had microscopic evidence of hepatitis, and developed viremia prior to seroconversion. The entire ORFs 2 and 3 were amplified by reverse transcription-PCR from sera of naturally infected pigs. The putative capsid gene (ORF2) of swine HEV shared about 79-80% sequence identity at the nucleotide level and 90-92% identity at the amino acid level with human HEV strains. The small ORF3 of swine HEV had 83-85% nucleotide sequence identity and 77-82% amino acid identity with human HEV strains. Phylogenetic analyses showed that swine HEV is closely related to, but distinct from, human HEV strains. The discovery of swine HEV not only has implications for HEV vaccine development, diagnosis, and biology, but also raises a potential public health concern for zoonosis or xenozoonosis following xenotransplantation with pig organs
doi_str_mv 10.1073/pnas.94.18.9860
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Swine HEV cross-reacts with antibody to the human HEV capsid antigen. Swine HEV is a ubiquitous agent and the majority of swine greater than or equal to 3 months of age in herds from the midwestern United States were seropositive. Young pigs naturally infected by swine HEV were clinically normal but had microscopic evidence of hepatitis, and developed viremia prior to seroconversion. The entire ORFs 2 and 3 were amplified by reverse transcription-PCR from sera of naturally infected pigs. The putative capsid gene (ORF2) of swine HEV shared about 79-80% sequence identity at the nucleotide level and 90-92% identity at the amino acid level with human HEV strains. The small ORF3 of swine HEV had 83-85% nucleotide sequence identity and 77-82% amino acid identity with human HEV strains. Phylogenetic analyses showed that swine HEV is closely related to, but distinct from, human HEV strains. 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Swine HEV cross-reacts with antibody to the human HEV capsid antigen. Swine HEV is a ubiquitous agent and the majority of swine greater than or equal to 3 months of age in herds from the midwestern United States were seropositive. Young pigs naturally infected by swine HEV were clinically normal but had microscopic evidence of hepatitis, and developed viremia prior to seroconversion. The entire ORFs 2 and 3 were amplified by reverse transcription-PCR from sera of naturally infected pigs. The putative capsid gene (ORF2) of swine HEV shared about 79-80% sequence identity at the nucleotide level and 90-92% identity at the amino acid level with human HEV strains. The small ORF3 of swine HEV had 83-85% nucleotide sequence identity and 77-82% amino acid identity with human HEV strains. Phylogenetic analyses showed that swine HEV is closely related to, but distinct from, human HEV strains. 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subjects Amino Acid Sequence
AMINO ACID SEQUENCES
Amino acids
ANIMAL VIRUSES
Animals
ANTIBODIES
Antibodies, Viral - analysis
Antibodies, Viral - immunology
ANTICORPS
ANTICUERPOS
Biological Sciences
Capsid
CERDO
CHEMICAL COMPOSITION
COAT PROTEINS
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
ELISA
Enzyme-Linked Immunosorbent Assay
GENBANK/AF011921
GENE
GENES
Hepatitis
Hepatitis E virus
Hepatitis E virus - genetics
Hepatitis E virus - immunology
Hepatitis E virus - isolation & purification
Herds
Hogs
Humans
IMMUNE RESPONSE
Infections
MICROBIAL PROTEINS
MOLECULAR SEQUENCE DATA
NUCLEOTIDE SEQUENCE
OPEN READING FRAMES
PHYLOGENETICS
Piglets
Polymerase chain reaction
PORCIN
PROTEINAS MICROBIANAS
PROTEINE MICROBIENNE
REPONSE IMMUNITAIRE
RESPUESTA INMUNOLOGICA
SECUENCIA NUCLEOTIDICA
Sequence Alignment
SEQUENCE NUCLEOTIDIQUE
SEROCONVERSION
STRUCTURAL GENES
SWINE
Swine - virology
SWINE HEPATITIS E VIRUS
TEST ELISA
UNCLASSIFIED VIRUSES
VIRUS DE LOS ANIMALES
VIRUS DES ANIMAUX
Viruses
title A novel virus in swine is closely related to the human hepatitis E virus
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