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https://www.readbyqxmd.com/read/29148889/lack-of-detection-of-avian-influenza-newcastle-disease-and-west-nile-viruses-in-wild-birds-of-northeastern-brazil
#1
Camile Lugarini, Renata Hurtado, Jansen de Araujo, Tatiana Ometto, Luciano Thomazelli, Marina de Seixas, Edison Durigon, Jean Carlos Silva
We tested 529 wild birds captured in northeastern Brazil for infection by avian influenza, Newcastle disease, and West Nile. Viruses were not detected by real-time PCR with the exception of one Tropical Gnatcatcher (Polioptila plumbea) positive for influenza virus, but this could not be confirmed by viral isolation or gene sequencing.
November 17, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/29148400/avian-influenza-a-h7n2-virus-in-human-exposed-to-sick-cats-new-york-usa-2016
#2
Atanaska Marinova-Petkova, Jen Laplante, Yunho Jang, Brian Lynch, Natosha Zanders, Marisela Rodriguez, Joyce Jones, Sharmi Thor, Erin Hodges, Juan A De La Cruz, Jessica Belser, Hua Yang, Paul Carney, Bo Shu, LaShondra Berman, Thomas Stark, John Barnes, Fiona Havers, Patrick Yang, Susan C Trock, Alicia Fry, Larisa Gubareva, Joseph S Bresee, James Stevens, Demetre Daskalakis, Dakai Liu, Christopher T Lee, Mia Kim Torchetti, Sandra Newbury, Francine Cigel, Kathy Toohey-Kurth, Kirsten St George, David E Wentworth, Stephen Lindstrom, C Todd Davis
An outbreak of influenza A(H7N2) virus in cats in a shelter in New York, NY, USA, resulted in zoonotic transmission. Virus isolated from the infected human was closely related to virus isolated from a cat; both were related to low pathogenicity avian influenza A(H7N2) viruses detected in the United States during the early 2000s.
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148399/distribution-of-usutu-virus-in-germany-and-its-effect-on-breeding-bird-populations
#3
Renke Lühken, Hanna Jöst, Daniel Cadar, Stephanie Margarete Thomas, Stefan Bosch, Egbert Tannich, Norbert Becker, Ute Ziegler, Lars Lachmann, Jonas Schmidt-Chanasit
Usutu virus (USUV) is an emerging mosquitoborne flavivirus with an increasing number of reports from several countries in Europe, where USUV infection has caused high avian mortality rates. However, 20 years after the first observed outbreak of USUV in Europe, there is still no reliable assessment of the large-scale impact of USUV outbreaks on bird populations. In this study, we identified the areas suitable for USUV circulation in Germany and analyzed the effects of USUV on breeding bird populations. We calculated the USUV-associated additional decline of common blackbird (Turdus merula) populations as 15...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148396/multiple-reassorted-viruses-as-cause-of-highly-pathogenic-avian-influenza-a-h5n8-virus-epidemic-the-netherlands-2016
#4
Nancy Beerens, Rene Heutink, Saskia A Bergervoet, Frank Harders, Alex Bossers, Guus Koch
In 2016, an epidemic of highly pathogenic avian influenza A virus subtype H5N8 in the Netherlands caused mass deaths among wild birds, and several commercial poultry farms and captive bird holdings were affected. We performed complete genome sequencing to study the relationship between the wild bird and poultry viruses. Phylogenetic analysis showed that the viruses are related to H5 clade 2.3.4.4 viruses detected in Russia in May 2016 but contained novel polymerase basic 2 and nucleoprotein gene segments and 2 different variants of the polymerase acidic segment...
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148393/new-avian-hepadnavirus-in-palaeognathous-bird-germany
#5
Wendy K Jo, Vanessa M Pfankuche, Henning Petersen, Samuel Frei, Maya Kummrow, Stephan Lorenzen, Martin Ludlow, Julia Metzger, Wolfgang Baumgärtner, Albert Osterhaus, Erhard van der Vries
In 2015, we identified an avian hepatitis B virus associated with hepatitis in a group of captive elegant-crested tinamous (Eudromia elegans) in Germany. The full-length genome of this virus shares <76% sequence identity with other avihepadnaviruses. The virus may therefore be considered a new extant avian hepadnavirus.
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148388/avian-influenza-h7n9-viruses-co-circulating-among-chickens-southern-china
#6
Nianchen Wang, Minhua Sun, Wenqing Wang, Guowen Ouyang, Zuxian Chen, You Zhang, Bingbing Zhao, Siyu Wu, Jianni Huang, Hailiang Sun, Ming Liao, Peirong Jiao
In April 2017, three avian influenza (H7N9) viruses were isolated from chickens in southern China. Each virus had different insertion points in the cleavage site of the hemagglutinin protein compared to the first identified H7N9 virus. We determined that these viruses were double or triple reassortant viruses.
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29148372/deaths-among-wild-birds-during-highly-pathogenic-avian-influenza-a-h5n8-virus-outbreak-the-netherlands
#7
Erik Kleyheeg, Roy Slaterus, Rogier Bodewes, Jolianne M Rijks, Marcel A H Spierenburg, Nancy Beerens, Leon Kelder, Marjolein J Poen, Jan A Stegeman, Ron A M Fouchier, Thijs Kuiken, Henk P van der Jeugd
During autumn-winter 2016-2017, highly pathogenic avian influenza A(H5N8) viruses caused mass die-offs among wild birds in the Netherlands. Among the ≈13,600 birds reported dead, most were tufted ducks (Aythya fuligula) and Eurasian wigeons (Anas penelope). Recurrence of avian influenza outbreaks might alter wild bird population dynamics.
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29146031/avian-ganglioneuritis-in-clinical-practice
#8
REVIEW
Giacomo Rossi, Robert D Dahlhausen, Livio Galosi, Susan E Orosz
Avian ganglioneuritis (AG) comprises one of the most intricate pathologies in avian medicine and is researched worldwide. Avian bornavirus (ABV) has been shown to be a causative agent of proventricular dilatation disease in birds. The avian Bornaviridae represent a genetically diverse group of viruses that are widely distributed in captive and wild populations around the world. ABV and other infective agents are implicated as a cause of the autoimmune pathology that leads to AG, similar to human Guillain Barrè syndrome...
January 2018: Veterinary Clinics of North America. Exotic Animal Practice
https://www.readbyqxmd.com/read/29143465/migratory-birds-in-southern-brazil-are-a-source-of-multiple-avian-influenza-virus-subtypes
#9
Jansen de Araujo, Maria Virgínia Petry, Thomas Fabrizio, David Walker, Tatiana Ometto, Luciano M Thomazelli, Angelo L Scherer, Patricia P Serafini, Isaac S Neto, Scott Krauss, Robert G Webster, Richard J Webby, Edison L Durigon
BACKGROUND: There is insufficient knowledge about the relation of avian influenza virus (AIV) to migratory birds in South America. Accordingly, we studied samples obtained over a 4-year period (2009-2012) from wild birds at a major wintering site in Southern Brazil. METHODS: We obtained 1212 oropharyngeal/cloacal samples from wild birds at Lagoa do Peixe National Park and screened them for influenza A virus by RT-PCR amplification of the matrix gene. Virus isolates were subjected to genomic sequencing and antigenic characterization...
November 15, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/29141204/characterization-of-the-complete-genome-antigenicity-pathogenicity-tissue-tropism-and-shedding-of-a-recombinant-avian-infectious-bronchitis-virus-with-a-ck-ch-ljl-140901-like-backbone-and-an-s2-fragment-from-a-4-91-like-virus
#10
Lei Jiang, Zongxi Han, Yuqiu Chen, Wenjun Zhao, Junfeng Sun, Yan Zhao, Shengwang Liu
In this study, we isolated an infectious bronchitis virus, designated I1101/16, from broiler breeders in China. Analysis of the S1 gene showed that isolate I1101/16 was genetically close to strain ck/CH/LJL/140901, which belongs to the TW I genotype (also known as lineage GI-7 based on the recent IBV classification), however the S2 gene showed genetic diversity comparing to that of S1 gene. Comparison of the genomic sequences showed that the genome of isolate I1101/16 was similar to that of strain ck/CH/LJL/140901 from the 5' end of the genome to the 5' end of the S2 gene and from the 5' end of the 3a gene to the end of the genome, whereas the remaining parts of the genome sequences were more closely related to those of strain 4/91 than those of ck/CH/LJL/140901, thereby suggesting that recombination might have occurred during the origin of the virus...
November 12, 2017: Virus Research
https://www.readbyqxmd.com/read/29137330/virtual-screening-approach-to-identifying-influenza-virus-neuraminidase-inhibitors-using-molecular-docking-combined-with-machine-learning-based-scoring-function
#11
Li Zhang, Hai-Xin Ai, Shi-Meng Li, Meng-Yuan Qi, Jian Zhao, Qi Zhao, Hong-Sheng Liu
In recent years, an epidemic of the highly pathogenic avian influenza H7N9 virus has persisted in China, with a high mortality rate. To develop novel anti-influenza therapies, we have constructed a machine-learning-based scoring function (RF-NA-Score) for the effective virtual screening of lead compounds targeting the viral neuraminidase (NA) protein. RF-NA-Score is more accurate than RF-Score, with a root-mean-square error of 1.46, Pearson's correlation coefficient of 0.707, and Spearman's rank correlation coefficient of 0...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137226/the-neglected-avian-hepatotropic-virus-induces-acute-and-chronic-hepatitis-in-ducks-an-alternative-model-for-hepatology
#12
Xumin Ou, Sai Mao, Jingyu Cao, Yunchao Ma, Guangpeng Ma, Anchun Cheng, Mingshu Wang, Dekang Zhu, Shun Chen, Renyong Jia, Mafeng Liu, Kunfeng Sun, Qiao Yang, Ying Wu, Xiaoyue Chen
Duck Hepatitis A Virus (DHAV) belongs to the Avihepatovirus, which is also classified into Picornaviridae with Hepatovirus, Hepatitis A Virus (HAV). In humans, the pathogenesis of HAV is not well understood because of limited work with animal models. Here, we investigated the progress of duck viral hepatitis caused by DHAV and their potential for dissecting the pathogenesis of HAV. During the course of infection, the duck model had undergone hepatocellular lesions (vacuolation, acidophilic degeneration and steatosis), lymphocytes recruitment (neutrophil granulocytes, heterophilic granulocytes and T cells or plasm cells) and repair (activation of hepatic stellate cells, fibrosis and regeneration)...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29134777/epidemiological-investigation-of-h9-avian-influenza-virus-newcastle-disease-virus-tembusu-virus-goose-parvovirus-and-goose-circovirus-infection-of-geese-in-china
#13
X Niu, H Wang, L Wei, M Zhang, J Yang, H Chen, Y Tang, Y Diao
To deepen the knowledge about epidemic prevalence in the goose breeding field, a triplex PCR assay was established, and 478 samples were collected from scaled goose farms in 11 provinces in China. The results of this epidemiological investigation showed that incidence rates of H9 avian influenza and goose circovirus were the highest among five infectious diseases that were evaluated. In addition, the triplex PCR assay established remarkable sensitivity, rapidity and versatility compared to other diagnostic methods...
November 13, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29132963/screening-for-viral-extraneous-agents-in-live-attenuated-avian-vaccines-by-using-a-microbial-microarray-and-sequencing
#14
Majken Lindholm Olesen, Lotte Leick Jørgensen, Merete Blixenkrone-Møller, Eva Sandberg, Peer Lyng Frandsen, Erik Østergaard, Eva Rauhe Bækdahl, Helena Fridholm, Anders Fomsgaard, Maiken Worsøe Rosenstierne
The absence of extraneous agents (EA) in the raw material used for production and in finished products is one of the principal safety elements related to all medicinal products of biological origin, such as live-attenuated vaccines. The aim of this study was to investigate the applicability of the Lawrence Livermore Microbial detection array version 2 (LLMDAv2) combined with whole genome amplification and sequencing for screening for viral EAs in live-attenuated vaccines and specific pathogen-free (SPF) eggs...
November 10, 2017: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/29132684/interactions-between-lactobacilli-and-chicken-macrophages-induce-antiviral-responses-against-avian-influenza-virus
#15
Bahram Shojadoost, Raveendra R Kulkarni, Jennifer T Brisbin, Wanderley Quinteiro-Filho, Tamiru N Alkie, Shayan Sharif
Macrophages are an important cell type of the innate immune system that upon activation, can exert antiviral functions and also can induce virus-specific adaptive immune responses. Macrophage interaction with certain probiotic bacteria such as lactobacilli can enhance antiviral functions of these cells. We have previously shown that administration of lactobacilli to chickens can effectively augment immune response to vaccine antigens. Here, we investigated the effects of representative strains of three Lactobacillus species, L...
October 31, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/29132350/avian-infectious-bronchitis-virus-disrupts-the-melanoma-differentiation-associated-gene-5-mda5-signaling-pathway-by-cleavage-of-the-adaptor-protein-mavs
#16
Liping Yu, Xiaorong Zhang, Tianqi Wu, Jin Su, Yuyang Wang, Yuexin Wang, Baoyang Ruan, Xiaosai Niu, Yantao Wu
BACKGROUND: Melanoma differentiation associated gene 5 (MDA5) and retinoic acid-inducible gene-I (RIG-I) selectively sense cytoplasmic viral RNA to induce an antiviral immune response. Infectious bronchitis virus (IBV) is one of the most important infectious agents in chickens, and in chicken cells, it can be recognized by MDA5 to activate interferon production. RIG-I is considered to be absent in chickens. However, the absence of RIG-I in chickens raises the question of whether this protein influences the antiviral immune response against IBV infection...
November 13, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29129490/rnalater-%C3%A2-is-a-viable-storage-option-for-avian-influenza-sampling-in-logistically-challenging-conditions
#17
Michelle Wille, Hong Yin, Åke Lundkvist, Juan Xu, Shaman Muradrasoli, Josef D Järhult
Surveillance of wild birds is critical in monitoring for highly pathogenic avian influenza A viruses (AIVs). However, a successful surveillance regime requires proper treatment of samples in the field - rapid placement of samples in -80°C and subsequent maintenance of cold-chain. Given the logistical difficulties of this, many avian taxa and/or geographic locations are not sampled, or, when sampled may result in false negatives due to poor sample treatment in the field. Here, we assessed the utility of RNAlater(®) as a stabilization agent for AIV sampling...
November 10, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/29129489/development-and-application-of-a-triplex-real-time-pcr-assay-for-the-simultaneous-detection-of-avian-influenza-virus-subtype-h5-h7-and-h9
#18
Junli Liu, Lu Yao, Feifei Zhai, Yuqing Chen, Jing Lei, Zhenwei Bi, Jianhua Hu, Qian Xiao, Suquan Song, Liping Yan, Jiyong Zhou
Avian influenza virus (AIV), especially subtypes H5, H7 and H9, has contributed to enormous economic losses and poses a potential pandemic threat to global human public health. Early screening of suspected cases is key to controlling the spread of AIVs. In this study, an accurate, rapid, and triplex real-time polymerase chain reaction (PCR) assay was developed for the simultaneous detection of AIV subtypes H5, H7 and H9. The sensitivity of the real-time PCR was at least 100 times higher than that of the conventional PCR, with a detection limit of 50 copies and an EID50 of 1 (50% egg infections dose) for the H5, H7, and H9 subtypes...
November 9, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/29126666/preparation-and-immunological-evaluation-of-inactivated-avian-influenza-virus-vaccine-encapsulated-in-chitosan-nanoparticles
#19
Samah H Mohamed, Abdel Satar Arafa, Wesam H Mady, Hanan A Fahmy, Lamiaa M Omer, Rania E Morsi
Efficacy maximization of inactivated avian influenza vaccine using safe adjuvants was investigated. Chitosan nanoparticles were prepared by ionic gelation method with average size of 150 nm and their Zeta potential was 11.5 mV. After encapsulation of avian influenza vaccine, the average size was 397 nm and Zeta potential was 4.29 mV. The highest HI antibody titer results were shown in chicken group vaccinated with inactivated avian influenza virus AIV-chitosan followed by the group vaccinated with inactivated AIV-chitosan nanoparticles then the group vaccinated with oil inactivated AIV vaccine, on using chicken antigen at 2 weeks post second vaccination...
November 8, 2017: Biologicals: Journal of the International Association of Biological Standardization
https://www.readbyqxmd.com/read/29124060/avian-influenza-virus-surveillance-in-south-central-spain-using-fecal-samples-of-aquatic-birds-foraging-at-landfills
#20
Andreia Bárbara, Olalla Torrontegi, Maria-Cruz Camacho, Marta Barral, Jose-Manuel Hernández, Ursula Höfle
Aquatic wild birds have been intensively studied to better understand their role in avian influenza virus (AIV) maintenance and spread. To date, AIV surveillance has primarily focused on natural aquatic environments where different bird species aggregate and viral survival is enhanced. However, artificial habitats such as landfills are attracting substantial numbers of wild birds, AIV reservoir species included. The use of landfills as a predictable food source has significantly influenced population size, migratory traits, and feeding behavior of white storks (Ciconia ciconia) and black-headed gulls (Chroicocephalus ridibundus) among others...
2017: Frontiers in Veterinary Science
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