scholarly journals Identification of a Putative Novel Genotype of Avian Hepatitis E Virus from Apparently Healthy Chickens in Southwestern Nigeria

Viruses ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 954
Author(s):  
Fisayo Temilade Osamudiamen ◽  
Olusola Aanuoluwapo Akanbi ◽  
Steffen Zander ◽  
Daniel Oladimeji Oluwayelu ◽  
Claus-Thomas Bock ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Egg Production ◽  
Hepatitis E Virus ◽  
Hepatitis E ◽  
Southwestern Nigeria ◽  
Fecal Samples ◽  
Genotype 2 ◽  
Avian Hepatitis E Virus ◽  
Pcr Targeting ◽  
Apparently Healthy

Avian hepatitis E virus (aHEV) is the major etiological agent of hepatitis-splenomegaly syndrome (HSS), big liver and spleen disease (BLSD), and hepatic rupture hemorrhage syndrome (HRHS) in chickens. Infections with aHEV cause a significant decrease in egg production and increased mortality in chickens worldwide. However, studies on the prevalence of aHEV in Nigeria are scarce. In this study, serum (n = 88) and fecal samples (n = 110) obtained from apparently healthy layer chickens from three states in southwestern Nigeria were analyzed by nested reverse transcription-polymerase chain reaction (nRT-PCR) targeting the helicase and capsid gene for the presence of aHEV. Avian HEV was detected in 12.5% (n = 11/88) of serum samples and 9.1% (n = 10/110) of fecal samples tested. Phylogenetic analysis showed that five of the twelve identified aHEV sequences belonged to genotype 2. The remaining seven sequences were only distantly related to other known aHEV isolates. After amplification of the near-complete ORF2 fragment (1618 bp) and part of the ORF1 (582 bp) of isolate YF40_aHEV_NG phylogenetic analysis revealed a nucleotide sequence identity between 79.0 and 82.6% and 80.1 and 83.5%, respectively, to other known aHEV strains, indicating that the Nigerian isolate YF40_aHEV_NG belongs to a novel aHEV genotype. This is the first report of co-circulation of aHEV genotypes in chickens in Nigeria.

Identification and characterization of avian hepatitis E virus genotype 2 from chickens with hepatitis-splenomegaly syndrome in Korea

Virus Genes ◽  
2016 ◽  
Vol 52 (5) ◽  
pp. 738-742 ◽  
Author(s):  
Hyun-Woo Moon ◽  
Byung-Woo Lee ◽  
Haan Woo Sung ◽  
Byung-Il Yoon ◽  
Hyuk Moo Kwon
Keyword(s):  
Hepatitis E Virus ◽  
Hepatitis E ◽  
Virus Genotype ◽  
Genotype 2 ◽  
Avian Hepatitis E Virus ◽  
Identification And Characterization

Decreased egg production in laying hens associated with infection with genotype 3 avian hepatitis E virus strain from China

2017 ◽  
Vol 203 ◽  
pp. 174-180 ◽  
Author(s):  
Qin Zhao ◽  
Baoyuan Liu ◽  
Yani Sun ◽  
Taofeng Du ◽  
Yiyang Chen ◽  
...  
Keyword(s):  
Virus Strain ◽  
Egg Production ◽  
Hepatitis E Virus ◽  
Laying Hens ◽  
Hepatitis E ◽  
Genotype 3 ◽  
Avian Hepatitis E Virus

scholarly journals Avian hepatitis E virus is widespread among chickens in Poland and belongs to genotype 2

2018 ◽  
Vol 164 (2) ◽  
pp. 595-599 ◽  
Author(s):  
Anna Karolina Matczuk ◽  
Katarzyna Ćwiek ◽  
Alina Wieliczko
Keyword(s):  
Hepatitis E Virus ◽  
Hepatitis E ◽  
Genotype 2 ◽  
Avian Hepatitis E Virus

scholarly journals Serological evidence of avian HEV antibodies in apparently healthy chickens in southwest Nigeria

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0247889
Author(s):  
Fisayo Temilade Osamudiamen ◽  
Olusola Aanuoluwapo Akanbi ◽  
Daniel Oladimeji Oluwayelu ◽  
C. -Thomas Bock ◽  
Patrycja Klink
Keyword(s):  
Egg Production ◽  
Age Groups ◽  
Hepatitis E ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Southwestern Nigeria ◽  
Hepatic Rupture ◽  
Layer Chicken ◽  
Layer Chickens ◽  
Apparently Healthy

Avian hepatitis E virus (aHEV) is associated with hepatitis-splenomegaly syndrome, big liver and spleen disease and hepatic rupture haemorrhage syndrome. However, the knowledge about aHEV in commercial layer chickens in Nigeria is scarce. In this study, 460 serum samples obtained from 36 apparently healthy commercial layer chicken flocks in three states (Ogun, Osun and Oyo States) of southwestern Nigeria were analysed by enzyme linked immunosorbent assay for the presence of anti-aHEV immunoglobulin Y (IgY) antibodies. In total, the overall seroprevalence of anti-aHEV antibodies was 14.6%. The serological analysis revealed that 75% of the flocks examined were positive for anti-aHEV IgY antibodies from chickens of various ages in all three states. The percentage of the seropositive chickens in the three states varied from flock to flock ranging from 60% to 88.8% and seropositive chickens were detected at any age (24–52 weeks of age) without significant differences between the age groups. This is the first report assessing the presence of aHEV antibodies in chickens from Nigeria. The detection of anti-aHEV antibodies in commercial layer chickens in this study emphasizes the importance of serosurveillance in disease monitoring due to the economic threat posed by aHEV as a result of decreased egg production and increased mortality in affected commercial layer chicken farms. However, further studies are essential to reveal the clinical implications and to assess the real burden of aHEV in Nigeria.

Infection of Pigs with Avian Hepatitis E Virus (HEV)

2005 ◽  
Author(s):  
C. Kasorndorkbua ◽  
P. J. Thomas ◽  
Patrick G. Halbur ◽  
D. K. Guenette ◽  
F. F. Huang ◽  
...  
Keyword(s):  
Hepatitis E Virus ◽  
Hepatitis E ◽  
Avian Hepatitis E Virus

scholarly journals Identification of two neutralization epitopes on the capsid protein of avian hepatitis E virus

2008 ◽  
Vol 89 (2) ◽  
pp. 500-508 ◽  
Author(s):  
E.-M. Zhou ◽  
H. Guo ◽  
F. F. Huang ◽  
Z. F. Sun ◽  
X. J. Meng
Keyword(s):  
Capsid Protein ◽  
Hepatitis E Virus ◽  
Hepatitis E ◽  
Avian Hepatitis E Virus

scholarly journals Comprehensive Molecular Approach for Characterization of Hepatitis E Virus Genotype 3 Variants

2018 ◽  
Vol 56 (5) ◽  
Author(s):  
Bo Wang ◽  
Dominik Harms ◽  
C. Patrick Papp ◽  
Sandra Niendorf ◽  
Sonja Jacobsen ◽  
...  
Keyword(s):  
Chronic Hepatitis ◽  
Hepatitis E Virus ◽  
Phylogenetic Analyses ◽  
Hepatitis E ◽  
Full Length ◽  
Molecular Approach ◽  
Genotype 3 ◽  
Genome Sequences ◽  
Virus Genotype ◽  
Pcr Targeting

ABSTRACT Autochthonous hepatitis E virus genotype 3 (HEV-3) infections in industrialized countries are more frequent than previously assumed. HEV-3 is zoonotic and the causal pathogen of chronic hepatitis E. According to the latest classification of the family Hepeviridae , 10 designated HEV-3 subtypes (HEV-3a to HEV-3j) and 7 unassigned HEV-3 subtypes are proposed. In order to identify and characterize the HEV-3 variants in circulation, we developed a molecular approach combining a sensitive HEV-specific real-time reverse transcription-PCR (RT-PCR) targeting the overlapping region of HEV ORF2 and ORF3 (the ORF2/3 region) and two newly designed consensus nested RT-PCRs targeting the HEV ORF1 and ORF2 genes, respectively. Since complete genome sequences are required for new HEV-3 subtype assignment, we implemented a straightforward approach for full-length HEV-3 genome amplification. Twenty-nine human serum samples and six human feces samples from chronic hepatitis E patients were selected for evaluation of the system. Viral loads ranged from 1 × 10 4 to 1.9 × 10 10 copies/ml of serum and from 1.8 × 10 4 to 1 × 10 12 copies/g of feces. Sequence and phylogenetic analyses of partial ORF1 and ORF2 sequences showed that HEV strains had considerable genetic diversity and clustered into the HEV-3c (29/35), HEV-3e (2/35), HEV-3f (2/35), and unassigned HEV-3 (2/35) subtypes. Moreover, from these strains, three full-length HEV-3 genome sequences were generated and characterized. DE/15-0030 represents a typical HEV-3c strain (95.7% nucleotide identity to wbGER27), while DE/15-0031 and SW/16-0282 have <89.2% homology to known HEV-3 strains and are phylogenetically divergent, indicating novel HEV-3 subtypes. In summary, our approach will significantly facilitate the detection, quantification, and determination of HEV-3 strains and will thus help to improve molecular diagnostics and our knowledge of HEV diversity and evolution.

scholarly journals Chicken Organic Anion-Transporting Polypeptide 1A2, a Novel Avian Hepatitis E Virus (HEV) ORF2-Interacting Protein, Is Involved in Avian HEV Infection

2019 ◽  
Vol 93 (11) ◽  
Author(s):  
Huixia Li ◽  
Mengnan Fan ◽  
Baoyuan Liu ◽  
Pinpin Ji ◽  
Yiyang Chen ◽  
...  
Keyword(s):  
Viral Infection ◽  
Capsid Protein ◽  
Hepatitis E Virus ◽  
Organic Anion ◽  
Hepatitis E ◽  
Host Cells ◽  
Cell Culture System ◽  
Organic Anion Transporting Polypeptide ◽  
Avian Hepatitis E Virus ◽  
Avian Hev

ABSTRACT Avian hepatitis E virus (HEV) is the main causative agent of big liver and spleen disease in chickens. Due to the absence of a highly effective cell culture system, there are few reports about the interaction between avian HEV and host cells. In this study, organic anion-transporting polypeptide 1A2 (OATP1A2) from chicken liver cells was identified to interact with ap237, a truncated avian HEV capsid protein spanning amino acids 313 to 549, by a glutathione S-transferase (GST) pulldown assay. GST pulldown and indirect enzyme-linked immunosorbent assays (ELISAs) further confirmed that the extracellular domain of OATP1A2 directly binds with ap237. The expression levels of OATP1A2 in host cells are positively correlated with the amounts of ap237 attachment and virus infection. The distribution of OATP1A2 in different tissues is consistent with avian HEV infection in vivo. Finally, when the functions of OATP1A2 in cells are inhibited by its substrates or an inhibitor or blocked by ap237 or anti-OATP1A2 sera, attachment to and infection of host cells by avian HEV are significantly reduced. Collectively, these results displayed for the first time that OATP1A2 interacts with the avian HEV capsid protein and can influence viral infection in host cells. The present study provides new insight to understand the process of avian HEV infection of host cells. IMPORTANCE The process of viral infection is centered around the interaction between the virus and host cells. Due to the lack of a highly effective cell culture system in vitro, there is little understanding about the interaction between avian HEV and its host cells. In this study, a total of seven host proteins were screened in chicken liver cells by a truncated avian HEV capsid protein (ap237) in which the host protein OATP1A2 interacted with ap237. Overexpression of OATP1A2 in the cells can promote ap237 adsorption as well as avian HEV adsorption and infection of the cells. When the function of OATP1A2 in cells was inhibited by substrates or inhibitors, attachment and infection by avian HEV significantly decreased. The distribution of OATP1A2 in different chicken tissues corresponded with that in tissues during avian HEV infection. This is the first finding that OATP1A2 is involved in viral infection of host cells.

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