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african swine fever

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https://www.readbyqxmd.com/read/28316972/prediction-of-pig-trade-movements-in-different-european-production-systems-using-exponential-random-graph-models
#1
Anne Relun, Vladimir Grosbois, Tsviatko Alexandrov, Jose M Sánchez-Vizcaíno, Agnes Waret-Szkuta, Sophie Molia, Eric Marcel Charles Etter, Beatriz Martínez-López
In most European countries, data regarding movements of live animals are routinely collected and can greatly aid predictive epidemic modeling. However, the use of complete movements' dataset to conduct policy-relevant predictions has been so far limited by the massive amount of data that have to be processed (e.g., in intensive commercial systems) or the restricted availability of timely and updated records on animal movements (e.g., in areas where small-scale or extensive production is predominant). The aim of this study was to use exponential random graph models (ERGMs) to reproduce, understand, and predict pig trade networks in different European production systems...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28303673/assessment-of-the-risk-of-african-swine-fever-introduction-into-finland-using-nora-a-rapid-tool-for-semiquantitative-assessment-of-the-risk
#2
J Kyyrö, L Sahlström, T Lyytikäinen
The NORA rapid risk assessment tool was developed for situations where there is a change in the disease status of easily transmissible animal diseases in neighbouring countries or in countries with significant interactions with Finland. The goal was to develop a tool that is quick to use and will provide consistent results to support risk management decisions. The model contains 63 questions that define the potential for entry and exposure by nine different pathways. The magnitude of the consequences is defined by 23 statements...
March 16, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28299893/co-circulation-of-multiple-genotypes-of-african-swine-fever-viruses-among-domestic-pigs-in-zambia-2013-2015
#3
E Simulundu, H M Chambaro, Y Sinkala, M Kajihara, H Ogawa, A Mori, J Ndebe, G Dautu, L Mataa, C H Lubaba, C Simuntala, P Fandamu, M Simuunza, G S Pandey, K L Samui, G Misinzo, A Takada, A S Mweene
During 2013-2015, several and severe outbreaks of African swine fever (ASF) affected domestic pigs in six provinces of Zambia. Genetic characterization of ASF viruses (ASFVs) using standardized genotyping procedures revealed that genotypes I, II and XIV were associated with these outbreaks. Molecular and epidemiological data suggest that genotype II ASFV (Georgia 2007/1-like) detected in Northern Province of Zambia may have been introduced from neighbouring Tanzania. Also, a genotype II virus detected in Eastern Province of Zambia showed a p54 phylogenetic relationship that was inconsistent with that of p72, underscoring the genetic variability of ASFVs...
March 15, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28298603/african-swine-fever-virus-np868r-capping-enzyme-promotes-reovirus-rescue-during-reverse-genetics-by-promoting-reovirus-protein-expression-virion-assembly-and-rna-incorporation-into-infectious-virions
#4
Heather E Eaton, Takeshi Kobayashi, Terence S Dermody, Randal N Johnston, Philippe H Jais, Maya Shmulevitz
Reoviruses, like many eukaryotic viruses, contain an inverted 7-methylguanosine (m7G) cap linked to the 5' nucleotide of mRNA. Traditional functions of capping are to promote mRNA stability, protein translation, and concealment from cellular proteins that recognize foreign RNA. To address the role of mRNA capping during reovirus replication, we assessed the benefits of adding the African swine fever virus NP868R capping enzyme. C3P3, a fusion protein containing T7 RNA polymerase and NP868R, was found to increase protein expression 5 to 10-fold, as compared to T7 RNA polymerase alone, while enhancing reovirus rescue from the current reverse genetics system by 100-fold...
March 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28296281/understanding-african-swine-fever-infection-dynamics-in-sardinia-using-a-spatially-explicit-transmission-model-in-domestic-pig-farms
#5
L Mur, J M Sánchez-Vizcaíno, E Fernández-Carrión, C Jurado, S Rolesu, F Feliziani, A Laddomada, B Martínez-López
African swine fever virus (ASFV) has been endemic in Sardinia since 1978, resulting in severe losses for local pig producers and creating important problems for the island's veterinary authorities. This study used a spatially explicit stochastic transmission model followed by two regression models to investigate the dynamics of ASFV spread amongst domestic pig farms, to identify geographic areas at highest risk and determine the role of different susceptible pig populations (registered domestic pigs, non-registered domestic pigs [brado] and wild boar) in ASF occurrence...
March 13, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28296132/polyvalent-2d-entry-inhibitors-for-pseudorabies-and-african-swine-fever-virus
#6
Benjamin Ziem, Jessica Rahn, Ievgen Donskyi, Kim Silberreis, Luis Cuellar, Jens Dernedde, Günther Keil, Thomas C Mettenleiter, Rainer Haag
African swine fever virus (ASFV) is one of the most dangerous viruses for pigs and is endemic in Africa but recently also spread into the Russian Federation and the Eastern border of the EU. So far there is no vaccine or antiviral drug available to curtail the infection. Thus, control strategies based on novel inhibitors are urgently needed. Another highly relevant virus infection in pigs is Aujeszky's disease caused by the alphaherpesvirus pseudorabies virus (PrV). This article reports the synthesis and biological evaluation of novel extracellular matrix-inspired entry inhibitors based on polyglycerol sulfate-functionalized graphene sheets...
March 15, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28245220/unique-5-p-recognition-and-basis-for-dg-dgtp-misincorporation-of-asfv-dna-polymerase-x
#7
Yiqing Chen, Jing Zhang, Hehua Liu, Yanqing Gao, Xuhang Li, Lina Zheng, Ruixue Cui, Qingqing Yao, Liang Rong, Jixi Li, Zhen Huang, Jinbiao Ma, Jianhua Gan
African swine fever virus (ASFV) can cause highly lethal disease in pigs and is becoming a global threat. ASFV DNA Polymerase X (AsfvPolX) is the most distinctive DNA polymerase identified to date; it lacks two DNA-binding domains (the thumb domain and 8-KD domain) conserved in the homologous proteins. AsfvPolX catalyzes the gap-filling reaction during the DNA repair process of the ASFV virus genome; it is highly error prone and plays an important role during the strategic mutagenesis of the viral genome. The structural basis underlying the natural substrate binding and the most frequent dG:dGTP misincorporation of AsfvPolX remain poorly understood...
February 2017: PLoS Biology
https://www.readbyqxmd.com/read/28241999/safety-and-immunogenicity-of-mammalian-cell-derived-and-modified-vaccinia-ankara-vectored-african-swine-fever-subunit-antigens-in-swine
#8
Jaime Lopera-Madrid, Jorge E Osorio, Yongqun He, Zuoshuang Xiang, L Garry Adams, Richard C Laughlin, Waithaka Mwangi, Sandesh Subramanya, John Neilan, David Brake, Thomas G Burrage, William Clay Brown, Alfonso Clavijo, Mangkey A Bounpheng
A reverse vaccinology system, Vaxign, was used to identify and select a subset of five African Swine Fever (ASF) antigens that were successfully purified from human embryonic kidney 293 (HEK) cells and produced in Modified vaccinia virus Ankara (MVA) viral vectors. Three HEK-purified antigens [B646L (p72), E183L (p54), and O61R (p12)], and three MVA-vectored antigens [B646L, EP153R, and EP402R (CD2v)] were evaluated using a prime-boost immunization regimen swine safety and immunogenicity study. Antibody responses were detected in pigs following prime-boost immunization four weeks apart with the HEK-293-purified p72, p54, and p12 antigens...
March 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28231033/evaluation-of-a-commercial-field-test-to-detect-african-swine-fever
#9
Stefano Cappai, Federica Loi, Annamaria Coccollone, Manuele Cocco, Caterina Falconi, Giovanna Dettori, Francesco Feliziani, Maria Luisa Sanna, Annalisa Oggiano, Sandro Rolesu
African swine fever (ASF) is one of the most important and complex infectious diseases affecting pigs ( Sus scrofa ). The disease has been present in Sardinia, Italy, since 1978. Factors influencing the presence of the disease on the island are the presence of illegally bred pigs, uncontrolled movements of animals, and local traditions. Implementation of public health programs is essential for controlling ASF. The use of new diagnostic techniques on both wild boar (WB) and illegally bred pigs would provide tools for faster and more inexpensive control of the disease...
February 23, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28218698/genetic-assessment-of-african-swine-fever-isolates-involved-in-outbreaks-in-the-democratic-republic-of-congo-between-2005-and-2012-reveals-co-circulation-of-p72-genotypes-i-ix-and-xiv-including-19-variants
#10
Leopold K Mulumba-Mfumu, Jenna E Achenbach, Matthew R Mauldin, Linda K Dixon, Curé Georges Tshilenge, Etienne Thiry, Noelia Moreno, Esther Blanco, Claude Saegerman, Charles E Lamien, Adama Diallo
African swine fever (ASF) is a devastating disease of domestic pigs. It is a socioeconomically important disease, initially described from Kenya, but subsequently reported in most Sub-Saharan countries. ASF spread to Europe, South America and the Caribbean through multiple introductions which were initially eradicated-except for Sardinia-followed by re‑introduction into Europe in 2007. In this study of ASF within the Democratic Republic of the Congo, 62 domestic pig samples, collected between 2005-2012, were examined for viral DNA and sequencing at multiple loci: C-terminus of the B646L gene (p72 protein), central hypervariable region (CVR) of the B602L gene, and the E183L gene (p54 protein)...
February 18, 2017: Viruses
https://www.readbyqxmd.com/read/28198455/polymerase-cross-linking-spiral-reaction-pclsr-for-detection-of-african-swine-fever-virus-asfv-in-pigs-and-wild-boars
#11
Grzegorz Woźniakowski, Magdalena Frączyk, Andrzej Kowalczyk, Małgorzata Pomorska-Mól, Krzysztof Niemczuk, Zygmunt Pejsak
The study reports the development of a polymerase cross-linking spiral reaction (PCLSR) for the detection of African swine fever virus (ASFV) DNA in blood collected from infected pigs and wild boars. The method uses 3 specifically designed primers. Two outer-spiral primers comprising of 3' sequences complementary to ASFV p72 gene sequence and 5'end sequences complementary to exogenous gene of black widow alpha-latrotoxin as well as additional ASFV specific cross-linking primer. The method is specific exclusively to ASFV DNA without cross-reactions with cDNA of classical swine fever virus (CSFV), porcine reproductive respiratory syndrome (PRRSV) or porcine epidemic diarrhea virus (PEDV)...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28189088/identification-of-residues-within-the-african-swine-fever-virus-dp71l-protein-required-for-dephosphorylation-of-translation-initiation-factor-eif2%C3%AE-and-inhibiting-activation-of-pro-apoptotic-chop
#12
Claire Barber, Chris Netherton, Lynnette Goatley, Alice Moon, Steve Goodbourn, Linda Dixon
The African swine fever virus DP71L protein recruits protein phosphatase 1 (PP1) to dephosphorylate the translation initiation factor 2α (eIF2α) and avoid shut-off of global protein synthesis and downstream activation of the pro-apoptotic factor CHOP. Residues V16 and F18A were critical for binding of DP71L to PP1. Mutation of this PP1 binding motif or deletion of residues between 52 and 66 reduced the ability of DP71L to cause dephosphorylation of eIF2α and inhibit CHOP induction. The residues LSAVL, between 57 and 61, were also required...
April 2017: Virology
https://www.readbyqxmd.com/read/28116841/biological-characterization-of-african-swine-fever-virus-genotype-ii-strains-from-north-eastern-estonia-in-european-wild-boar
#13
I Nurmoja, A Petrov, C Breidenstein, L Zani, J H Forth, M Beer, M Kristian, A Viltrop, S Blome
Due to its impact on animal health and pig industry, African swine fever (ASF) is regarded as one of the most important viral diseases of pigs. Following the ongoing epidemic in the Transcaucasian countries and the Russian Federation, African swine fever virus was introduced into the Estonian wild boar population in 2014. Epidemiological investigations suggested two different introductions into the southern and the north-eastern part of Estonia. Interestingly, outbreak characteristics varied considerably between the affected regions...
January 24, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28096614/evidence-of-hemolysis-in-pigs-infected-with-highly-virulent-african-swine-fever-virus
#14
Zaven Karalyan, Hovakim Zakaryan, Elina Arakelova, Violeta Aivazyan, Marina Tatoyan, Armen Kotsinyan, Roza Izmailyan, Elena Karalova
AIM: The research was conducted to understand more profoundly the pathogenetic aspects of the acute form of the African swine fever (ASF). MATERIALS AND METHODS: A total of 10 pigs were inoculated with ASF virus (ASFV) (genotype II) in the study of the red blood cells (RBCs), blood and urine biochemistry in the dynamics of disease. RESULTS: The major hematological differences observed in ASFV infected pigs were that the mean corpuscular volume, mean corpuscular hemoglobin, and hematocrits were significantly decreased compared to controls, and the levels of erythropoietin were significantly increased...
December 2016: Veterinary World
https://www.readbyqxmd.com/read/28062012/characterization-of-the-interaction-of-african-swine-fever-virus-with-monocytes-and-derived-macrophage-subsets
#15
Giulia Franzoni, Simon P Graham, Silvia Dei Giudici, Piero Bonelli, Giovannantonio Pilo, Antonio G Anfossi, Marco Pittau, Paola S Nicolussi, Alberto Laddomada, Annalisa Oggiano
African swine fever (ASF) is a devastating disease for which there is no vaccine available. The ASF virus (ASFV) primarily infects cells of the myeloid lineage and this tropism is thought to be crucial for disease pathogenesis. A detailed in vitro characterization of the interactions of a virulent Sardinian isolate (22653/14) and a tissue culture adapted avirulent strain (BA71V) of ASFV with porcine monocytes, un-activated (moMΦ), classically (moM1) and alternatively (moM2) activated monocyte-derived macrophages was conducted in an attempt to better understand this relationship...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28061875/regional-level-risk-factors-associated-with-the-occurrence-of-african-swine-fever-in-west-and-east-africa
#16
Zheng Y X Huang, Frank van Langevelde, Karanina J Honer, Marc Naguib, Willem F de Boer
BACKGROUND: African swine fever (ASF) causes severe socio-economic impacts due to high mortality and trade restrictions. Many risk factors of ASF have been identified at farm level. However, understanding the risk factors, especially wild suid hosts, determining ASF transmission at regional level remains limited. METHODS: Based on ASF outbreak data in domestic pigs during 2006-2014, we here tested, separately for West and East Africa, which risk factors were linked to ASF presence at a regional level, using generalized linear mixed models...
January 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28053104/structural-insight-into-african-swine-fever-virus-a179l-mediated-inhibition-of-apoptosis
#17
Suresh Banjara, Sofia Caria, Linda K Dixon, Mark G Hinds, Marc Kvansakul
Programmed cell death is a tightly controlled process critical for the removal of damaged or infected cells. Pro- and antiapoptotic proteins of the Bcl-2 family are pivotal mediators of this process. African swine fever virus (ASFV) is a large DNA virus, the only member of the Asfarviridae family, and harbors A179L, a putative Bcl-2 like protein. A179L has been shown to bind to several proapoptotic Bcl-2 proteins; however, the hierarchy of binding and the structural basis for apoptosis inhibition are currently not understood...
March 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28031363/unraveling-the-armor-of-a-killer-evasion-of-host-defenses-by-african-swine-fever-virus
#18
REVIEW
Ana Luisa Reis, Chris Netherton, Linda K Dixon
African swine fever is an acute hemorrhagic disease of pigs. Extensive recent spread in the Russian Federation and Eastern Europe has increased the risk to global pig production. The virus is a large DNA virus and is the only member of the Asfarviridae family. In pigs, the virus replicates predominantly in macrophages. We review how the virus overcomes the barriers to replication in the macrophage and the virus mechanism to inhibit key host defense pathways.
March 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/27974557/african-swine-fever-virus-gets-undressed-new-insights-on-the-entry-pathway
#19
REVIEW
Germán Andrés
African swine fever virus (ASFV) is a large, multienveloped DNA virus composed of a genome-containing core successively wrapped by an inner lipid envelope, an icosahedral protein capsid, and an outer lipid envelope. In keeping with this structural complexity, recent studies have revealed an intricate entry program. This Gem highlights how ASFV uses two alternative pathways, macropinocytosis and clathrin-mediated endocytosis, to enter into the host macrophage and how the endocytosed particles undergo a stepwise, low pH-driven disassembly leading to inner envelope fusion and core delivery in the cytoplasm...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/27966070/african-swine-fever-outbreak-on-a-medium-sized-farm-in-uganda-biosecurity-breaches-and-within-farm-virus-contamination
#20
Erika Chenais, Susanna Sternberg-Lewerin, Sofia Boqvist, Lihong Liu, Neil LeBlanc, Tonny Aliro, Charles Masembe, Karl Ståhl
In Uganda, a low-income country in east Africa, African swine fever (ASF) is endemic with yearly outbreaks. In the prevailing smallholder subsistence farming systems, farm biosecurity is largely non-existent. Outbreaks of ASF, particularly in smallholder farms, often go unreported, creating significant epidemiological knowledge gaps. The continuous circulation of ASF in smallholder settings also creates biosecurity challenges for larger farms. In this study, an on-going outbreak of ASF in an endemic area was investigated on farm level, including analyses of on-farm environmental virus contamination...
February 2017: Tropical Animal Health and Production
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