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https://www.readbyqxmd.com/read/28619140/decreased-egg-production-in-laying-hens-associated-with-infection-with-genotype-3-avian-hepatitis-e-virus-strain-from-china
#1
Qin Zhao, Baoyuan Liu, Yani Sun, Taofeng Du, Yiyang Chen, Xinjie Wang, Huixia Li, Yuchen Nan, Gaiping Zhang, En-Min Zhou
To determine the relationship between decreased egg production and avian HEV infection, thirty healthy 23-week-old Hy-Line Variety Brown layer hens were randomly divided into 3 groups with 10 hens per group. Next, a genotype 3 avian HEV strain from China was used to inoculate laying hens via oronasal or intravenous routes using a 50% chicken infectious dose of 500. All hens were necropsied at 14 weeks postinoculation (wpi). Fecal virus shedding, viremia, seroconversion, serum alanine aminotransferase (ALT) increases and liver lesions showed that after intravenous (i...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28528763/evaluation-of-recombinant-chinese-avian-hepatitis-e-virus-cahev-orf2-and-orf3-proteins-for-protection-of-chickens-against-cahev-infection
#2
Shahid Faraz Syed, Yani Sun, Taofeng Du, Yiyang Chen, Baoyuan Liu, Xinjie Wang, Huixia Li, Yuchen Nan, En-Min Zhou, Qin Zhao
Avian hepatitis E virus (HEV) is the etiologic agent of big liver and spleen disease in chickens. In 2010, the Chinese avian HEV (CaHEV) strain was isolated from chickens and demonstrated to cause the decreased egg production in layer hens. No avian HEV commercial vaccine has yet been developed to prevent virus infection in China. In this study, recombinant CaHEV truncated ORF2 and complete ORF3 proteins were evaluated separately for immunoprotection of chickens against CaHEV infection. First, truncated ORF2 and complete ORF3 proteins were expressed in Escherichia coli...
May 18, 2017: Vaccine
https://www.readbyqxmd.com/read/28396209/immunogenicity-and-protective-efficacy-of-virus-like-particles-and-recombinant-fiber-proteins-in-broiler-breeder-vaccination-against-fowl-adenovirus-fadv-8b
#3
Ashish Gupta, Khawaja Ashfaque Ahmed, Lisanework E Ayalew, Shelly Popowich, Shanika Kurukulasuriya, Kalhari Goonewardene, Thushari Gunawardana, Ruwani Karunarathna, Davor Ojkic, Suresh K Tikoo, Philip Willson, Susantha Gomis
Inclusion body hepatitis (IBH) is an economically important diseases in broiler chicken industry. Several serotypes of fowl adenovirus (FAdV) can cause IBH, among them, serotype FAdV-8b is associated with the majority of the IBH cases in Canada. Here, we evaluated FAdV-8b virus-like particles (VLPs) and recombinant FAdV-8b fiber proteins (expressed in E. coli) as potential broiler-breeder vaccines against IBH. For assessing the immunogenicity of vaccines, we investigated both humoral and cellular immunity. The humoral immune response was evaluated by determining total IgY and virus-neutralizing antibody in serum at 14, 28, 35 and 60days post-immunization (dpi)...
May 9, 2017: Vaccine
https://www.readbyqxmd.com/read/28160143/molecular-characterisation-of-fowl-adenovirus-type-7-isolated-from-poultry-associated-with-inclusion-body-hepatitis-in-poland
#4
Jowita Samanta Niczyporuk
The fowl adenovirus field strain FAdV-JSN-5/10j (GenBank accession number KP879219) was isolated from the intestine of a 7-week-old chicken diagnosed with inclusion body hepatitis and simultaneously with Marek's disease, and for that reason, it was chosen for molecular study. It was identified as fowl adenovirus genotype 7 (species Fowl aviadenovirus E) based on nucleotide sequence analysis of the loop L1 region of the hexon gene. Nucleotide sequence alignment of this strain, FAdV-7 reference strains B-3A ATCC VR-832 (AF339922) and YR36 (AF508955), and eight additional FAdV-7 field strains confirmed its classification as FAdV-JS-5/10j and showed that these viruses are very similar to each other...
May 2017: Archives of Virology
https://www.readbyqxmd.com/read/27989815/a-novel-avian-like-hepatitis-e-virus-in-wild-aquatic-bird-little-egret-egretta-garzetta-in-hungary
#5
Gábor Reuter, Ákos Boros, Róbert Mátics, Beatrix Kapusinszky, Eric Delwart, Péter Pankovics
Hepatitis E virus (HEV), family Hepeviridae, has public health concerns because of its zoonotic potential; however, the host species spectrum, animal to animal transmissions, the natural chain of hepevirus infections and the genetic diversity of HEV in wildlife especially in birds are less known. Using random amplification and next generation sequencing technology a genetically divergent avian HEV was serendipitously identified in wild bird in Hungary. HEV RNA was detected with high faecal viral load (1.33×10(8) genomic copies/ml) measured by real-time PCR in faecal sample from a little egret (Egretta garzetta)...
October 29, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27938684/characterization-of-fowl-adenoviruses-isolated-between-2007-and-2014-in-china
#6
Li Changjing, Li Haiying, Wang Dongdong, Wang Jingjing, Wang Youming, Wang Shouchun, Li Jida, Liu Ping, Wang Jianlin, Xu Shouzhen, Cui Shangjin, Zhang Yi, Yin Yanbo
Forty-three fowl adenovirus (FAdV) strains were isolated in China from 2007 to 2014 from poultry and ostriches with inclusion body hepatitis (IBH) and hydropericardium syndrome (HPS). Phylogenetic analysis showed that 28/43 strains clustered into Fowl aviadenovirus D (FAdV-D) and 9/43 strains clustered into FAdV-E. FAdV-C included three isolates of ostrich origin, one of goose origin and two of chicken origin. Based on hexon loop 1 gene sequencing analysis, these viruses were genetically related to FAdV-4, FAdV-8a, FAdV-8b and FAdV-11, of which FAdV-11 was dominant...
December 25, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/27890632/evidence-of-genotypes-1-and-3-of-avian-hepatitis-e-virus-in-wild-birds
#7
Xinquan Zhang, Ivana Bilic, Salome Troxler, Michael Hess
Although the presence of four genotypes of avian hepatitis E virus (HEV) in chickens has been demonstrated, its natural host range is still barely known. In this study, swab samples from 626 wild birds originating from 62 bird species were investigated for HEV detection by molecular methods. The aim was to explore the cross-species infection of avian HEV and to compare the genetic diversity between strains infecting chicken and wild birds. In total, 8 positive samples from 4 different bird species (song thrush, little owl, feral pigeon and common buzzard) were identified and further confirmed by partial sequencing of ORF3...
January 15, 2017: Virus Research
https://www.readbyqxmd.com/read/27876615/a-novel-avian-like-hepatitis-e-virus-in-wild-aquatic-bird-little-egret-egretta-garzetta-in-hungary
#8
Gábor Reuter, Ákos Boros, Róbert Mátics, Beatrix Kapusinszky, Eric Delwart, Péter Pankovics
Hepatitis E virus (HEV), family Hepeviridae, has public health concerns because of its zoonotic potential; however, the host species spectrum, animal to animal transmissions, the natural chain of hepevirus infections and the genetic diversity of HEV in wildlife especially in birds are less known. Using random amplification and next generation sequencing technology a genetically divergent avian HEV was serendipitously identified in wild bird in Hungary. HEV RNA was detected with high faecal viral load (1.33×10(8)genomiccopies/ml) measured by real-time PCR in faecal sample from a little egret (Egretta garzetta)...
December 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27876045/seroprevalence-of-avian-hepatitis-e-virus-and-avian-leucosis-virus-subgroup-j-in-chicken-flocks-with-hepatitis-syndrome-china
#9
Yani Sun, Taofeng Du, Baoyuan Liu, Shahid Faraz Syed, Yiyang Chen, Huixia Li, Xinjie Wang, Gaiping Zhang, En-Min Zhou, Qin Zhao
BACKGROUND: From 2014 to 2015 in China, many broiler breeder and layer hen flocks exhibited a decrease in egg production and some chickens developed hepatitis syndrome including hepatomegaly, hepatic necrosis and hemorrhage. Avian hepatitis E virus (HEV) and avian leucosis virus subgroup J (ALV-J) both cause decreasing in egg production, hepatomegaly and hepatic hemorrhage in broiler breeder and layer hens. In the study, the seroprevalence of avian HEV and ALV-J in these flocks emerging the disease from Shandong and Shaanxi provinces were investigated...
November 22, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27869591/vertebrate-host-susceptibility-to-heartland-virus
#10
Angela M Bosco-Lauth, Amanda E Calvert, J Jeffrey Root, Tom Gidlewski, Brian H Bird, Richard A Bowen, Atis Muehlenbachs, Sherif R Zaki, Aaron C Brault
Heartland virus (HRTV) is a recently described phlebovirus initially isolated in 2009 from 2 humans who had leukopenia and thrombocytopenia. Serologic assessment of domestic and wild animal populations near the residence of 1 of these persons showed high exposure rates to raccoons, white-tailed deer, and horses. To our knowledge, no laboratory-based assessments of viremic potential of animals infected with HRTV have been performed. We experimentally inoculated several vertebrates (raccoons, goats, chickens, rabbits, hamsters, C57BL/6 mice, and interferon-α/β/γ receptor-deficient [Ag129]) mice with this virus...
December 2016: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27865971/complete-genome-sequence-of-a-non-pathogenic-strain-of-fowl-adenovirus-serotype-11-minimal-genomic-differences-between-pathogenic-and-non-pathogenic-viruses
#11
Angel E Absalón, Andrés Morales-Garzón, Pedro F Vera-Hernández, Diana V Cortés-Espinosa, Sara M Uribe-Ochoa, Laura J García, Eduardo Lucio-Decanini
In this study, we conducted the clinicopathological characterization of a non-pathogenic FAdV-D serotype 11 strain MX95, isolated from healthy chickens, and its entire genome was sequenced. Experiments in SPF chickens revealed that the strain is a non-pathogenic virus that did not cause death at challenge doses of 1×10(6) TCID50. Additionally, the infection in SPF chickens caused no apparent damage in most of the organs analyzed by necropsy and histopathology, but it did cause inclusion body hepatitis; nevertheless it did not generate severe infectious clinical symptoms...
January 15, 2017: Virology
https://www.readbyqxmd.com/read/27738984/animal-models-for-hepatitis-e-virus
#12
Lin Wang, Ling Wang
Animal models are one of the most important tools in the study of human hepatitis E virus (HEV) infection. They are particularly important in light of the major limitations of the cell culture system for HEV. Besides nonhuman primates, which are extremely valuable because of their susceptibility to HEV genotypes 1-4, animals like swine, rabbit, and chicken are also potential models for studies of pathogenesis, cross-species infection, and the molecular biology of HEV. Identification of the most useful animal model for human HEV infection studies is crucial to further investigations into this ubiquitous yet poorly understood virus...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27738976/hepatitis-e-virus
#13
Youchun Wang, Chenyan Zhao, Ying Qi, Yansheng Geng
Since the sequence of hepatitis E virus (HEV) was determined from a patient with enterically transmitted non-A, non-B hepatitis in 1989, similar sequences have been isolated from many different animals, including pigs, wild boars, deer, rabbits, bats, rats, chicken, and trout. All of these sequences have the same genomic organization, which contains open reading frames (ORFs) 1, 2, and 3, although their genomic sequences are variable. Some have proposed that they be classified as new family, Hepeviridae, which would be further divided into different genera and species according to their sequence variability...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27733122/ancient-recombination-events-and-the-origins-of-hepatitis-e-virus
#14
Andrew G Kelly, Natalie E Netzler, Peter A White
BACKGROUND: Hepatitis E virus (HEV) is an enteric, single-stranded, positive sense RNA virus and a significant etiological agent of hepatitis, causing sporadic infections and outbreaks globally. Tracing the evolutionary ancestry of HEV has proved difficult since its identification in 1992, it has been reclassified several times, and confusion remains surrounding its origins and ancestry. RESULTS: To reveal close protein relatives of the Hepeviridae family, similarity searching of the GenBank database was carried out using a complete Orthohepevirus A, HEV genotype I (GI) ORF1 protein sequence and individual proteins...
October 12, 2016: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/27615553/fowl-adenovirus-species-c-serotype-4-is-attributed-to-the-emergence-of-hepatitis-hydropericardium-syndrome-in-chickens-in-china
#15
Huixin Li, Juan Wang, Liye Qiu, Zongxi Han, Shengwang Liu
Since July in 2015, an emerging infectious disease of Hepatitis-Hydropericardium syndrome (HHS) was prevalent in chicken flocks in China. To confirm the causative agent and investigate the epidemiology of the disease, a total of 38 chicken flocks including 187 samples from Jilin, Liaoning, Heilongjiang, Henan, Anhui, Hubei, Jiangxi, Xinjiang, Shandong and Hunan provinces in China were collected and determined by PCR detection, sequencing, phylogenetic analysis and virus isolation. 81 samples (positive rate of samples, 81/187, 43...
September 9, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27610734/natural-infection-with-avian-hepatitis-e-virus-and-marek-s-disease-virus-in-brown-layer-chickens-in-china
#16
Shuqing Yang, Liyuan Wang, Shuhong Sun
In the present study, avian hepatitis E virus (HEV) and serotype-1 strains of Marek's disease virus (MDV-1) were detected from a flock of 27-wk-old brown layer hens in China, accompanied by an average daily mortality of 0.44%. Postmortem examination of 25 sick hens and five apparently healthy hens selected randomly from the flock showed significant pathologic changes consistent with hepatitis-splenomegaly syndrome (HSS), including hepatomegaly, peritoneal fluid, and hepatic subcapsular hemorrhages. Microscopic examination of these livers showed multifocal necrotizing hepatitis and mild lymphocytic infiltration...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27610716/hepatitis-virus-infections-in-poultry
#17
Danielle M Yugo, Ruediger Hauck, H L Shivaprasad, Xiang-Jin Meng
Viral hepatitis in poultry is a complex disease syndrome caused by several viruses belonging to different families including avian hepatitis E virus (HEV), duck hepatitis B virus (DHBV), duck hepatitis A virus (DHAV-1, -2, -3), duck hepatitis virus Types 2 and 3, fowl adenoviruses (FAdV), and turkey hepatitis virus (THV). While these hepatitis viruses share the same target organ, the liver, they each possess unique clinical and biological features. In this article, we aim to review the common and unique features of major poultry hepatitis viruses in an effort to identify the knowledge gaps and aid the prevention and control of poultry viral hepatitis...
September 2016: Avian Diseases
https://www.readbyqxmd.com/read/27610014/hepatitis-e-discovery-global-impact-control-and-cure
#18
REVIEW
Mohammad S Khuroo, Mehnaaz S Khuroo, Naira S Khuroo
Hepatitis E was identified as an epidemic of non-A, non-B hepatitis from Kashmir, India in 1978. Hepatitis E virus (HEV), the etiological agent is the sole member of family Hepeviridae. The virus has marked heterogeneity and infects many animals like bats, camel, chicken, deer, boar, mongoose, pigs, rats, rabbit and cutthroat trout. Hepatitis E is a disease with a major global impact and has two distinct epidemiological patterns. Hepatitis E is an imperative health issue in developing nations, transmitted through sullied water and happens most every now in young adults...
August 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27418664/molecular-characterization-of-quail-bronchitis-virus-isolated-from-bobwhite-quail-in-minnesota
#19
Azad Singh, Aschalew Z Bekele, Devi P Patnayak, Naresh Jindal, Robert E Porter, Sunil K Mor, Sagar M Goyal
From 2008 to 2012, 4 separate cases of quail bronchitis virus infection were seen in bobwhite quail (Colinus virginianus) raised in Minnesota. The quail chicks ranged in age from 5 d to 8 wk and suffered from respiratory distress and elevated mortality. On necropsy, gross lesions consisted of mucus in trachea, congested lungs, caseous air sacculitis, accumulation of chalky white urates on internal organs, necrotic foci in liver, and enlarged spleen. Histologic examination revealed fibrinoheterophilic rhinitis, heterophilic bronchitis, heterophilic tracheitis, and interstitial pneumonia in addition to deciliation, desquamation, and necrosis of bronchial respiratory epithelium...
December 1, 2016: Poultry Science
https://www.readbyqxmd.com/read/27356980/the-outcome-of-experimentally-induced-inclusion-body-hepatitis-ibh-by-fowl-aviadenoviruses-fadvs-is-crucially-influenced-by-the-genetic-background-of-the-host
#20
Miguel Matos, Beatrice Grafl, Dieter Liebhart, Michael Hess
In the present study, inclusion body hepatitis (IBH) was experimentally induced by oral inoculation of two groups of specific pathogen-free (SPF) broilers and two groups of SPF layers at day-old with either a fowl aviadenovirus (FAdV)-D or a FAdV-E strain. A substantial variation in the degree of susceptibility was observed with mortalities of 100 and 96% in the FAdV-E and D infected SPF broiler groups, respectively, whereas in the groups of infected SPF layers mortalities of only 20 and 8% were noticed. Significant changes in clinical chemistry analytes of all infected birds together with histopathological lesions indicated impairment of liver and pancreas integrity and functions...
2016: Veterinary Research
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