1
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Yang C, Shah PT, Bahoussi AN, Wu C, Wang L, Xing L. Duck hepatitis a virus: Full-length genome-based phylogenetic and phylogeographic view during 1986-2020. Virus Res 2023; 336:199216. [PMID: 37657508 PMCID: PMC10507229 DOI: 10.1016/j.virusres.2023.199216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 07/10/2023] [Accepted: 08/29/2023] [Indexed: 09/03/2023]
Abstract
Duck hepatitis A virus (DHAV) is one of key pathogens for duck viral hepatitis, especially in Asian duck industry. Currently, two main genotypes (DHAV-1 and -3) exist. To explore insightfully the evolutionary character, we assessed the available 141 full-length genome sequences of DHAV isolated in 1986-2020 globally and divided DHAV-1 and DHAV-3 into further seven (DHAV-1 a-g) and five (DHAV-3 a-e) sub-clades, respectively. Phylogenetic and phylogeographic network analyses indicated great genetic diversity of DHAV identified in China, where the DHAV-1 cluster and DHAV-3 cluster were linked by virus strain HDHV1-BJ (GenBank ID: FJ157172.1) and Du_CH_LSD_090612 (GenBank ID: JF828995.1) via a long mutational branch and intermediate strains. Several strains previously identified as DHAV-1 according to the partial gene sequences were actually clustered within DHAV-3 in full-length genome-based analysis. Furthermore, we identified 32 recombination events across virus genome with the recombination hotspot at the 5' end and upstream of the capsid coding region. The highest variability of DHAV polyprotein was shown at the upstream region of the N terminus P-loop region, e.g., amino acids 672-716, followed by the aa 334-359 in the Capsid encoding region. The results presented here provides a robust insight into the genetic exchange patterns of DHAV genomes during the past decades, which may be used to map the evolutionary history and facilitate preventive measures of DHAVs.
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Affiliation(s)
- Caiting Yang
- Institutes of Biomedical Sciences, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi 030006, China
| | - Pir Tariq Shah
- Institutes of Biomedical Sciences, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi 030006, China
| | - Amina Nawal Bahoussi
- Institute of Environmental Science, Shanxi University, 63 Nanzhonghuan East Street, Taiyuan 030031, China
| | - Changxin Wu
- Institutes of Biomedical Sciences, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi 030006, China
| | - Li Wang
- Institute of Environmental Science, Shanxi University, 63 Nanzhonghuan East Street, Taiyuan 030031, China
| | - Li Xing
- Institutes of Biomedical Sciences, Shanxi University, 92 Wucheng Road, Taiyuan, Shanxi 030006, China; Shanxi Provincial Key Laboratory for Prevention and Treatment of Major Infectious Diseases, 92 Wucheng Road, Taiyuan 030006, China; The Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Shanxi University, Taiyuan 030006, China.
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2
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Zhang Y, Wu S, Liu W, Hu Z. Current status and future direction of duck hepatitis A virus vaccines. Avian Pathol 2023; 52:89-99. [PMID: 36571394 DOI: 10.1080/03079457.2022.2162367] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Duck viral hepatitis (DVH), mainly caused by duck hepatitis A virus (DHAV), is a highly fatal and rapidly spreading infectious disease of young ducklings that seriously jeopardizes the duck industry worldwide. DHAV type 1 (DHAV-1) is the main genotype responsible for disease outbreaks since 1945, and the disease situation is complicated by the emergence and dissemination of a novel genotype (DHAV-3) in some countries in Asia and Africa. Live attenuated DHAV vaccines are widely used to induce a considerable degree of protection in ducklings. Breeder ducks are immunized with inactivated or/and live DHAV vaccines to achieve satisfactory levels of passive immunity in progeny. In addition, novel characteristics of virus transmission, pathogenicity and pathogenesis of DHAV were recently characterized, necessitating the development of new vaccines and effective vaccination programmes against DVH. Therefore, a systematic dissection of the profiles, strengths and shortcomings of the available DHAV vaccines is essential. Moreover, to further increase the efficiency of vaccine production and administration, the development of next-generation DHAV vaccines using cutting-edge technologies is also required. In this review, based on a comprehensive summary of the research advances in the epidemiology, pathogenicity, and genomic features of DHAV, we focus on reviewing and analysing the features of the commercial and experimental DHAV vaccines. We also propose perspectives for disease control based on the specific disease situations in different countries. This review provides essential information for vaccine development and disease control of DVH.
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Affiliation(s)
- Yanyan Zhang
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, People's Republic of China.,Key Laboratory of Animal Infectious Diseases, School of Veterinary Medicine, Yangzhou University, Yangzhou, People's Republic of China
| | - Shuang Wu
- Jiangsu Agri-animal Husbandry Vocational College, Jiangsu Key Laboratory for High-Tech Research and Development of Veterinary Biopharmaceuticals, Taizhou, People's Republic of China
| | - Wenbo Liu
- Key Laboratory of Animal Infectious Diseases, School of Veterinary Medicine, Yangzhou University, Yangzhou, People's Republic of China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou University, Yangzhou, People's Republic of China
| | - Zenglei Hu
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, People's Republic of China.,Key Laboratory of Animal Infectious Diseases, School of Veterinary Medicine, Yangzhou University, Yangzhou, People's Republic of China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou University, Yangzhou, People's Republic of China
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3
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Yin L, Zhou Q, Mai K, Yan Z, Shen H, Li Q, Chen L, Zhou Q. Epidemiological investigation of duck adenovirus 3 in southern China, during 2018-2020. Avian Pathol 2022; 51:171-180. [PMID: 35088627 DOI: 10.1080/03079457.2022.2034737] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Duck adenovirus 3 (DAdV-3) has been identified as the causative agent of a disease characterized by swelling and hemorrhages in liver and kidney of Muscovy ducks, causing huge economic losses to the waterfowl industry in China. In this study, a total of 54 DAdV-3 outbreaks from 2018 to 2020 in China were monitored with samples being collected and analyzed. The hexon amino acid sequences of the 54 DAdV-3 outbreaks and the DAdV-3 reference strains from GenBank were 98.7% to 100% identical. Epidemiological analysis showed that DAdV-3 circulated in meat-type and egg-laying Muscovy ducks, and co-infections with other viral and bacterial pathogens, such as Muscovy duck parvovirus (MDPV), Muscovy duck-origin goose parvovirus (MDGPV), Adeno-associated virus (AAV), Duck hepatitis B virus (DHBV), R. anatipestifer, and E. coli were identified. In addition, 12 out of the 23 (52.2%) DAdV-3 strains were isolated by LMH cells and identified by DAdV-3 real-time PCR. The whole-genome sequence analysis demonstrated that 12 new DAdV-3 isolates share 99.8-100% identity with the DAdV-3 reference strains, and 9 new DAdV-3 isolates exhibit a truncated ORF67 gene. Our results enhance the understanding of the epidemiology and molecular characterization associated with DAdV-3 infection in China.Highlights First report of the epidemiology of duck adenovirus 3 infection in China.Mutant DAdV-3 strains (truncated ORF67) became the predominant virus.
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Affiliation(s)
- Lijuan Yin
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China
| | - Qi Zhou
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China
| | - Kaijie Mai
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China
| | - Zhuanqiang Yan
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China.,College of Animal Science, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Hanqin Shen
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China.,College of Animal Science, South China Agricultural University, 483 Wushan Road, Guangzhou, 510642, China
| | - Qunhui Li
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China
| | - Li Chen
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China
| | - Qingfeng Zhou
- Wen' s Group Academy, Wen' s Foodstuffs Group Co, Ltd, Xinxing, Yunfu, Guangdong, 527400, China
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4
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Hassan TIR, Eid AAM, Ghanem IAI, Shahin AM, Adael SAA, Mohamed FF. First Report of Duck Hepatitis A Virus 3 from Duckling Flocks of Egypt. Avian Dis 2021; 64:269-276. [PMID: 33205161 DOI: 10.1637/aviandiseases-d-19-00158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 02/26/2020] [Indexed: 11/05/2022]
Abstract
Duck hepatitis A viruses (DHAV-1, DHAV-2, and DHAV-3) are the predominant causes of duck virus hepatitis (DVH), a disease of ducklings that leads to massive morbidities, mortalities, and economic losses. As a duck-producing country, Egypt suffered lately from several attacks of DVH, despite the regular vaccination of birds. Between Spring 2016 and Summer 2018, 54 duckling flocks in the Sharkia province of Egypt were tested using the reverse-transcription PCR (RT-PCR) based on the DHAV-3D targeting primers. Of them, 27.8% (15/54) were positive. Upon retesting of positive samples using RT-PCR and duck hepatitis A virus (DHAV)-3 VP1-based primers, 33.3% (5/15) contained DHAV-3 RNA. For further analysis at the molecular level, the VP1 and the 3D genes were sequenced using the same primer sets used earlier. The phylogenetic trees confirmed that study sequences belonged to DHAV-3. However, they were displayed as a separate cluster following a geographically dependent distribution. They were also completely unrelated to the Egyptian DHAV-1-based vaccine. This was further confirmed by low nucleotide and amino acid identities in relation to this vaccine. In addition, the VP1 and 3D genes had the same phylogenetic topography. The study VP1 sequences had three unique amino acid substitutions (L59, V208 only in one strain, and C219). As far as we know, this is the first report on DHAV-3 outside Asia, particularly in Egypt. Accordingly, the vaccination strategy against DHAV should be quickly updated to avoid further dissemination of the virus. The epidemiology, pathogenicity, and evolution of DHAV-3 should be carefully monitored in Egypt.
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Affiliation(s)
- Tamer I R Hassan
- Department of Poultry Diseases, Animal Health Research Institute (Zagazig Branch), Zagazig, Sharkia, 44511 Egypt
| | - Amal A M Eid
- Department of Avian and Rabbit Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Sharkia, 44511 Egypt
| | - Ibrahim A I Ghanem
- Department of Avian and Rabbit Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Sharkia, 44511 Egypt
| | - Abeer M Shahin
- Department of Avian and Rabbit Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Sharkia, 44511 Egypt
| | - Samy A A Adael
- Department of Poultry Diseases, Animal Health Research Institute (Zagazig Branch), Zagazig, Sharkia, 44511 Egypt
| | - Fakry F Mohamed
- Department of Virology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Sharkia, 44511 Egypt
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5
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Cao J, Zhang Y, Chen Y, Liang S, Liu D, Fan W, Xu Y, Liu H, Zhou Z, Liu X, Hou S. Dynamic Transcriptome Reveals the Mechanism of Liver Injury Caused by DHAV-3 Infection in Pekin Duck. Front Immunol 2020; 11:568565. [PMID: 33240261 PMCID: PMC7677298 DOI: 10.3389/fimmu.2020.568565] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 10/08/2020] [Indexed: 01/17/2023] Open
Abstract
Duck hepatitis A virus 3 (DHAV-3) is a wild endemic virus, which seriously endangers the duck industry in China. The present study aims to elucidate the mechanism of duck resistance to DHAV-3 infection. Both resistant and susceptible ducks were challenged with DHAV-3 in this experiment. The histopathological features and serum biochemical indices (ALT and AST) were analyzed to estimate liver injury status at 6, 12, 15, and 24 h post-infection (hpi). The dynamic transcriptomes of liver were analyzed to explain the molecular regulation mechanism in ducks against DHAV-3. The result showed that the liver injury in susceptible ducks was more serious than that in the resistant ducks throughout the four time points. A total of 2,127 differentially expressed genes (DEGs) were identified by comparing the transcriptome of the two populations. The expression levels of genes involved in innate immune response increased rapidly in susceptible ducks from 12 hpi. Similarly, the expression of genes involved in cytokine regulation also increased at the same time points, while the expression levels of these genes in resistant ducks remained similar between the various time points. KEGG enrichment analysis of the DEGs revealed that the genes involved in cytokine regulation and apoptosis were highly expressed in susceptible ducks than that in resistant ducks, suggesting that excessive cytokine storm and apoptosis may partially explain the mechanism of liver injury caused by DHAV-3 infection. Besides, we found that the FUT9 gene may contribute to resistance towards DHAV-3 in resistant ducklings. These findings will provide insight into duck resistance and susceptibility to DHAV-3 infection in the early phases, facilitate the development of a strategy for DHAV-3 prevention and treatment, and enhance genetic resistance via genetic selection in animal breeding.
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Affiliation(s)
- Junting Cao
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, China.,Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yunsheng Zhang
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ying Chen
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Suyun Liang
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Dapeng Liu
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wenlei Fan
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.,College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Yaxi Xu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, China.,Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hehe Liu
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhengkui Zhou
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaolin Liu
- Shaanxi Key Laboratory of Molecular Biology for Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Shuisheng Hou
- Ministry of Agriculture Key Laboratory of Animal Genetics Breeding and Reproduction (Poultry), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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6
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Yehia N, Erfan AM, Omar SE, Soliman MA. Dual Circulation of Duck Hepatitis A Virus Genotypes 1 and 3 in Egypt. Avian Dis 2020; 65:1-9. [PMID: 34339115 DOI: 10.1637/aviandiseases-d-20-00075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 08/20/2020] [Indexed: 11/05/2022]
Abstract
Duck hepatitis A virus (DHAV) causes acute hepatitis and mortality, resulting in high economic losses in the duck farm industry. The current study describes the outbreak of DHAV in vaccinated duck farms in North Egypt during 2019 and molecular characterization of the 3' untranslated region (UTR) and viral protein VP1 genes. The 30 samples were collected from 7- to 28-day-old commercial Pekin ducks that showed a history of nervous signs and sudden deaths and were on farms in 6 governorates. DHAV was typed by reverse transcription-polymerase chain reaction (RT-PCR) for 3' UTR and VP1 genes and revealed 20 positive farms, with the first detection of DHAV genotype 3 (DHAV-3) in 18 samples and the classic DHAV-1 in 2 samples. The phylogenetic analysis of VP1 and 3' UTR genes of the nine selected strains representative of six governorates revealed that seven strains were clustered with DHAV-3 Chinese and Korean-Vietnamese strains within different subgroups with 92.4%-93.7% amino acid identity; such strains were distinguishable from the vaccine strain of DHAV-1 used in Egypt with 74.4% amino acid identity. The other strains were closely related to the DHAV-1 Asian strain and the vaccine strain used in Egypt with 98.7%-99.6% amino acid identity for the VP1 gene with different clustering than that of recently isolated DHAV-1 Egyptian strains. The VP1 gene of DHAV-3 had 1 hypervariable region (HVR) with 10 amino acid mutations compared with DHAV3/DN2/Vietnam/2011, but DHAV-1 had 3 HVRs with 1 amino acid mutation in HVRII compared with the DHAV-1 vaccine strain. In conclusion, a new introduction of DHAV-3 with the classical DHAV-1 was recorded in Pekin duck farms in North Egypt that is genetically distant from the vaccinal strain.
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Affiliation(s)
- Nahed Yehia
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Giza, 12618 Egypt
| | - Ahmed M Erfan
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Giza, 12618 Egypt
| | - Sabry E Omar
- Animal Health Research Institute, Banha Branch, Agricultural Research Center, Giza, Egypt
| | - Mohamed A Soliman
- Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agricultural Research Center, Giza, 12618 Egypt,
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7
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Meng C, Huang Y, Rehman ZU, Hu W, Li C, Liang R, Chen Z, Song K, Wei T, Liu G. Development of an MCA-Based Real Time RT-qPCR Assay for the Simultaneous Detection and Differentiation of Duck Hepatitis A Virus Types 1 and 3. Virol Sin 2020; 35:666-669. [PMID: 32270426 DOI: 10.1007/s12250-020-00211-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 03/03/2020] [Indexed: 11/26/2022] Open
Affiliation(s)
- Chunchun Meng
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Yunxiu Huang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
- College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Zaib Ur Rehman
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Wen Hu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Chuanfeng Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Ruiying Liang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Zongyan Chen
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Kaijie Song
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China
| | - Tianchao Wei
- College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Guangqing Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai, 200241, China.
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8
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A Novel Peptide Isolated from a Phage Display Peptide Library Modeling Antigenic Epitope of DHAV-1 and DHAV-3. Vaccines (Basel) 2020; 8:vaccines8010121. [PMID: 32150877 PMCID: PMC7157547 DOI: 10.3390/vaccines8010121] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 03/04/2020] [Indexed: 12/19/2022] Open
Abstract
Duck hepatitis A virus (DHAV), the major pathogen of duck virus hepatitis (DVH), causes severe diseases that threaten the duck industry worldwide. The VP1 protein, a major structural protein of DHAV, is able to induce neutralizing antibody in ducks. The purpose of this study was to identify the antigenic mimotope of DHAV by phage display technology. A monoclonal antibody (mAb) 4E6 against DHAV-1 and DHAV-3 was prepared, and a phage library prepared with the PhD-12 Phage Display Peptide Library Kit was screened with the mAb. A novel peptide, 1GLTWKLPPSM10 was identified with high affinity to the mAb and could specifically block mAb 4E6 from binding DHAV-1 and DHAV-3. Animal tests confirmed that the immunization of ducklings with the mimotope could inhibit the virus proliferation and protect the ducklings from DVH. In summary, the neutralizing conformational mimotope 1GLTWKLPPSM10 might be a promising vaccine candidate for the prevention of DHAV infection.
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9
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Isolation and characterization of duck adenovirus 3 circulating in China. Arch Virol 2018; 164:847-851. [PMID: 30564896 PMCID: PMC6394704 DOI: 10.1007/s00705-018-4105-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 11/05/2018] [Indexed: 11/16/2022]
Abstract
Recently, infectious disease outbreaks characterized by swelling and hemorrhagic liver and kidneys occurred in Muscovy ducklings in China. Four viruses were isolated and identified as adenoviruses by transmission electron microscopy (TEM) and polymerase chain reaction (PCR). Sequence analysis identified the new isolates as duck adenovirus 3 (DAdV-3), species Duck aviadenovirus B. The pathogenicity of the new isolate DAdV-3 FJGT01 was investigated using challenge experiments. The gross lesions in the animal experiment were similar to the clinical lesions observed in the diseased ducks. TEM examination of liver sample showed that virions accumulated and arranged in crystal lattice formations in the nuclei of hepatocytes. The present study provides new information about the epidemiology and characteristics of duck adenovirus associated with Muscovy ducklings.
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10
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Liu R, Shi S, Huang Y, Chen Z, Chen C, Cheng L, Fu G, Chen H, Wan C, Fu Q. Comparative pathogenicity of different subtypes of duck hepatitis A virus in Pekin ducklings. Vet Microbiol 2018; 228:181-187. [PMID: 30593365 DOI: 10.1016/j.vetmic.2018.11.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 11/25/2018] [Accepted: 11/30/2018] [Indexed: 01/21/2023]
Abstract
Duck hepatitis A virus (DHAV) is a major pathogen of viral hepatitis in ducks, which is a fatal and contagious disease of young ducklings. Despite the identification of numerous DHAV strains (e.g. DHAV-3, DHAV-2, DHAV-1 and DHAV-1a), the pathogenic differences among the different subtypes have not been evaluated. The objective of this study was to compare the pathogenic properties of three epidemic strains DHAV-3, DHAV-1, and DHAV-1a in mainland China, in a Pekin duckling infection model. We evaluated the pathogenicity of these different subtypes by investigating clinical signs, macroscopic and microscopic lesions, immunohistochemical examination, and viral RNA detection after experimental inoculation of Pekin ducklings with the three different DHAV strains. There was no significant difference in pathogenicity between DHAV-3 and DHAV-1. Pathogenicity of DHAV-1a differed significantly from that of classical duck hepatitis A (DHAV-3 or DHAV-1), in that there were no clinical signs of opisthotonos. More importantly, pancreatic bleeding or yellowing, and spleen swelling and bleeding were the predominant lesions in the DHAV-1a group, while liver and spleen lesions were the main signs in classical hepatitis (DHAV-1/3). Our findings indicate that there are differences in the pathogenicity of different subtypes of DHAV in ducklings, which may be useful for understanding the biological characteristics of the different subtypes of DHAV in ducks.
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Affiliation(s)
- Rongchang Liu
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Shaohua Shi
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Yu Huang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China.
| | - Zhen Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Cuiteng Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Longfei Cheng
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Guanghua Fu
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Hongmei Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Chunhe Wan
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
| | - Qiuling Fu
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fujian Animal Diseases Control Technology Center, Fujian Provincial Key Laboratory for Avian Diseases Control and Prevention, Fuzhou 350013, China
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