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https://www.readbyqxmd.com/read/29327672/linear-epitopes-in-african-swine-fever-virus-p72-recognized-by-monoclonal-antibodies-prepared-against-baculovirus-expressed-antigen
#1
Mallory E Heimerman, Maria V Murgia, Ping Wu, Andre D Lowe, Wei Jia, Raymond R Rowland
Protein p72 is the major capsid protein of African swine fever virus (ASFV) and is an important target for test and vaccine development. Monoclonal antibodies (mAbs) were prepared against a recombinant antigenic fragment, from amino acid (aa) 20-303, expressed in baculovirus. A total of 29 mAbs were recovered and tested by immunofluorescent antibody (IFA) staining on ASFV Lisbon-infected Vero cells. Six antibodies were IFA-positive and selected for further characterization. Epitope mapping was performed against overlapping polypeptides expressed in E...
January 1, 2018: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/29327614/intracellular-african-swine-fever-virus-dna-remains-unmethylated-in-infected-vero-cells
#2
Stefanie Weber, Astghik Hakobyan, Hovakim Zakaryan, Walter Doerfler
AIM: Sequence-specific CpG methylation of eukaryotic promoters is an important epigenetic signal for long-term gene silencing. We have now studied the methylation status of African swine fever virus (ASFV) DNA at various times after infection of Vero cells in culture. METHODS & RESULTS: ASFV DNA was detectable throughout the infection cycle and was found unmethylated in productively infected Vero cells as documented by bisulfite sequencing of 13 viral DNA segments...
January 12, 2018: Epigenomics
https://www.readbyqxmd.com/read/29298122/evaluation-of-viral-genome-copies-within-viral-factories-on-different-dna-viruses
#3
Zaven A Karalyan, Roza A Izmailyan, Liana O Abroyan, Aida S Avetisyan, Lina A Hakobyan, Hovakim S Zakaryan, Elena M Karalova
This article describes a simple method of measuring the number of viral genomes within viral factories. For this purpose, we use three DNA viruses replicating in the cytoplasm of the infected cells: wild-type African swine fever virus (ASFV)-Georgia 2007, culture-adapted type ASFV-BA71V, and Vaccinia virus (VV). The measurements are conducted in three steps. In the first step, after DNA staining, we evaluate Integrated Optical Density (IOD) of total DNA for each viral factory. The second step involves the calculations of the mass of DNA in the viral factories in picograms (pg)...
January 1, 2018: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/29279082/spatial-multi-criteria-decision-analysis-for-modelling-suitable-habitats-of-ornithodoros-soft-ticks-in-the-western-palearctic-region
#4
L Vial, E Ducheyne, S Filatov, A Gerilovych, D S McVey, I Sindryakova, S Morgunov, A A Pérez de León, D Kolbasov, E M De Clercq
Ticks are economically and medically important ectoparasites due to the injuries inflicted through their bite, and their ability to transmit pathogens to humans, livestock, and wildlife. Whereas hard ticks have been intensively studied, little is known about soft ticks, even though they can also transmit pathogens, including African Swine Fever Virus (ASFV) affecting domestic and wild suids or Borrelia bacteria causing tick-borne relapsing fever (TBRF) in humans. We thus developed a regional model to identify suitable spatial areas for a community of nine Ornithodoros tick species (O...
January 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29246986/african-swine-fever-and-the-risks-of-feeding-food-waste-to-pigs
#5
Nigel Gibbens
No abstract text is available yet for this article.
December 16, 2017: Veterinary Record
https://www.readbyqxmd.com/read/29244872/the-ubiquitin-proteasome-system-is-required-for-african-swine-fever-replication
#6
Lucía Barrado-Gil, Inmaculada Galindo, Diego Martínez-Alonso, Sergio Viedma, Covadonga Alonso
Several viruses manipulate the ubiquitin-proteasome system (UPS) to initiate a productive infection. Determined viral proteins are able to change the host's ubiquitin machinery and some viruses even encode their own ubiquitinating or deubiquitinating enzymes. African swine fever virus (ASFV) encodes a gene homologous to the E2 ubiquitin conjugating (UBC) enzyme. The viral ubiquitin-conjugating enzyme (UBCv1) is expressed throughout ASFV infection and accumulates at late times post infection. UBCv is also present in the viral particle suggesting that the ubiquitin-proteasome pathway could play an important role at early ASFV infection...
2017: PloS One
https://www.readbyqxmd.com/read/29235978/rigid-amphipathic-fusion-inhibitors-demonstrate-antiviral-activity-against-african-swine-fever-virus
#7
Astghik Hakobyan, Inmaculada Galindo, Almudena Nañez, Erik Arabyan, Zaven Karalyan, Alexey A Chistov, Philipp P Streshnev, Vladimir A Korshun, Covadonga Alonso, Hovakim Zakaryan
Rigid amphipathic fusion inhibitors (RAFIs) are a family of nucleoside derivatives that inhibit the infectivity of several enveloped viruses by interacting with virion envelope lipids and inhibiting fusion between viral and cellular membranes. Here we tested the antiviral activity of two RAFIs, 5-(Perylen-3-ylethynyl)-arabino-uridine (aUY11) and 5-(Perylen-3-ylethynyl)uracil-1-acetic acid (cm1UY11) against African swine fever virus (ASFV), for which no effective vaccine is available. Both compounds displayed a potent, dose-dependent inhibitory effect on ASFV infection in Vero cells...
December 13, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/29196741/bayesian-inference-of-epidemiological-parameters-from-transmission-experiments
#8
Ben Hu, Jose L Gonzales, Simon Gubbins
Epidemiological parameters for livestock diseases are often inferred from transmission experiments. However, there are several limitations inherent to the design of such experiments that limits the precision of parameter estimates. In particular, infection times and latent periods cannot be directly observed and infectious periods may also be censored. We present a Bayesian framework accounting for these features directly and employ Markov chain Monte Carlo techniques to provide robust inferences and quantify the uncertainty in our estimates...
December 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29194985/a-multiplex-reverse-transcription-pcr-and-automated-electronic-microarray-assay-for-detection-and-differentiation-of-seven-viruses-affecting-swine
#9
A Erickson, M Fisher, T Furukawa-Stoffer, A Ambagala, D Hodko, J Pasick, D P King, C Nfon, R Ortega Polo, O Lung
Microarray technology can be useful for pathogen detection as it allows simultaneous interrogation of the presence or absence of a large number of genetic signatures. However, most microarray assays are labour-intensive and time-consuming to perform. This study describes the development and initial evaluation of a multiplex reverse transcription (RT)-PCR and novel accompanying automated electronic microarray assay for simultaneous detection and differentiation of seven important viruses that affect swine (foot-and-mouth disease virus [FMDV], swine vesicular disease virus [SVDV], vesicular exanthema of swine virus [VESV], African swine fever virus [ASFV], classical swine fever virus [CSFV], porcine respiratory and reproductive syndrome virus [PRRSV] and porcine circovirus type 2 [PCV2])...
November 30, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29186958/tick-borne-viruses
#10
P Bartíková, V Holíková, M Kazimírová, I Štibrániová
Tick-borne viruses (TBVs) belong to the largest biological group known as arboviruses with unique mode of transmission by blood-feeding arthropods (ticks, mosquitoes, sand flies, biting midges, etc.) to a susceptible vertebrate host. Taxonomically, it is a heterogenous group of vertebrate viruses found in several viral families. With only one exception, African swine fever virus, all TBVs have a RNA genome. To date, at least 160 tick-borne viruses are known, some of them pose a significant threat to human and animal health worldwide...
2017: Acta Virologica
https://www.readbyqxmd.com/read/29183365/african-and-classical-swine-fever-similarities-differences-and-epidemiological-consequences
#11
REVIEW
Katja Schulz, Christoph Staubach, Sandra Blome
For the global pig industry, classical (CSF) and African swine fever (ASF) outbreaks are a constantly feared threat. Except for Sardinia, ASF was eradicated in Europe in the late 1990s, which led to a research focus on CSF because this disease continued to be present. However, ASF remerged in eastern Europe in 2007 and the interest in the disease, its control and epidemiology increased tremendously. The similar names and the same susceptible species suggest a similarity of the two viral diseases, a related biological behaviour and, correspondingly, similar epidemiological features...
November 28, 2017: Veterinary Research
https://www.readbyqxmd.com/read/29164067/tick-borne-transmission-of-murine-gammaherpesvirus-68
#12
Valeria Hajnická, Marcela Kúdelová, Iveta Štibrániová, Mirko Slovák, Pavlína Bartíková, Zuzana Halásová, Peter Pančík, Petra Belvončíková, Michaela Vrbová, Viera Holíková, Rosemary S Hails, Patricia A Nuttall
Herpesviruses are a large group of DNA viruses infecting mainly vertebrates. Murine gammaherpesvirus 68 (MHV68) is often used as a model in studies of the pathogenesis of clinically important human gammaherpesviruses such as Epstein-Barr virus and Kaposi's sarcoma-associated herpesvirus. This rodent virus appears to be geographically widespread; however, its natural transmission cycle is unknown. Following detection of MHV68 in field-collected ticks, including isolation of the virus from tick salivary glands and ovaries, we investigated whether MHV68 is a tick-borne virus...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29143187/multi-locus-sequence-typing-of-african-swine-fever-viruses-from-endemic-regions-of-kenya-and-eastern-uganda-2011-2013-reveals-rapid-b602l-central-variable-region-evolution
#13
C K Onzere, A D Bastos, E A Okoth, J K Lichoti, E N Bochere, M G Owido, G Ndambuki, M Bronsvoort, R P Bishop
The central variable region (CVR) within the B602L gene of the African swine fever virus (ASFV) is highly polymorphic within the 23 ASFV genotypes defined by sequencing of the C-terminal end of the p72 locus. Sequencing the p54 gene further discriminates ASFV genotypes that are conserved at the p72 locus. Variation in the thymidine kinase locus is a novel additional tool for ASFV genotyping whose application for this purpose is described for the first time herein. We evaluated genetic variation at these four polymorphic loci in 39 ASFV isolates obtained from outbreaks in Kenya and a region of Eastern Uganda between 2011 and 2013...
November 15, 2017: Virus Genes
https://www.readbyqxmd.com/read/29139069/piloting-the-effectiveness-of-pig-health-education-in-combination-with-oxfendazole-treatment-on-prevention-and-or-control-of-porcine-cysticercosis-gastrointestinal-parasites-african-swine-fever-and-ectoparasites-in-ang%C3%A3-nia-district-mozambique
#14
A G Chilundo, M V Johansen, A Pondja, R Miambo, S Afonso, S Mukaratirwa
A community-based intervention combining health education (HE) and treatment of pigs for control of porcine cysticercosis (PC), gastrointestinal (GI) helminths, African swine fever (ASF) and external parasites was tested involving six villages of resource-poor smallholder pig farmers. Farmers and pigs of six rural villages were randomly allocated into group 1 (HE), which served as controls, and group 2 (HE + OFZ) pigs received a single oral dose of 30 mg/kg OFZ. Farmers were trained in pig health, housing and feeding...
November 14, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29124058/implementation-of-a-regional-training-program-on-african-swine-fever-as-part-of-the-cooperative-biological-engagement-program-across-the-caucasus-region
#15
Marco De Nardi, Anaïs Léger, Tatul Stepanyan, Bagrat Khachatryan, Talgat Karibayev, Igor Sytnik, Samat Tyulegenov, Assel Akhmetova, Serhiy Nychyk, Mykola Sytiuk, Oleg Nevolko, Roman Datsenko, Tengiz Chaligava, Lasha Avaliani, Otar Parkadze, Lena Ninidze, Natia Kartskhia, Tsira Napetvaridze, Zviad Asanishvili, Demna Khelaia, Ioseb Menteshashvili, Meruzhan Zadayan, Lyudmila Niazyan, Nataliya Mykhaylovska, Bradford Raymond Brooks, Gulnara Zhumabayeva, Saltanat Satabayeva, Magda Metreveli, Theresa Gallagher, Richard Obiso
A training and outreach program to increase public awareness of African swine fever (ASF) was implemented by Defense Threat Reduction Agency and the Ministries of Agriculture in Armenia, Georgia, Kazakhstan, and Ukraine. The implementing agency was the company SAFOSO (Switzerland). Integration of this regional effort was administered by subject matter experts for each country. The main teaching effort of this project was to develop a comprehensive regional public outreach campaign through a network of expertise and knowledge for the control and prevention of ASF in four neighboring countries that experience similar issues with this disease...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29120101/inferring-within-herd-transmission-parameters-for-african-swine-fever-virus-using-mortality-data-from-outbreaks-in-the-russian-federation
#16
C Guinat, T Porphyre, A Gogin, L Dixon, D U Pfeiffer, S Gubbins
Mortality data are routinely collected for many livestock and poultry species, and they are often used for epidemiological purposes, including estimating transmission parameters. In this study, we infer transmission rates for African swine fever virus (ASFV), an important transboundary disease of swine, using mortality data collected from nine pig herds in the Russian Federation with confirmed outbreaks of ASFV. Parameters in a stochastic model for the transmission of ASFV within a herd were estimated using approximate Bayesian computation...
November 9, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29117102/mechanisms-of-entry-and-endosomal-pathway-of-african-swine-fever-virus
#17
REVIEW
Elena G. Sánchez, Daniel Pérez-Núñez, Yolanda Revilla
African Swine Fever Virus (ASFV) causes a serious swine disease that is endemic in Africa and Sardinia and presently spreading in Russia and neighboring countries, including Poland and recently, the Czech Republic. This uncontrolled dissemination is a world-wide threat, as no specific protection or vaccine is available. ASFV is a very complex icosahedral, enveloped virus about 200 nm in diameter, which infects several members of pigs. The virus enters host cells by receptor-mediated endocytosis that depends on energy, vacuolar pH and temperature...
November 8, 2017: Vaccines
https://www.readbyqxmd.com/read/29110237/prevalence-of-african-swine-fever-virus-and-classical-swine-fever-virus-antibodies-in-pigs-in-benue-state-nigeria
#18
A Asambe, A K B Sackey, L B Tekdek
This study investigated the prevalence of African swine fever virus (ASFV) and classical swine fever virus (CSFV) antibodies in pigs in Benue State, Nigeria. Serum samples were collected from a total of 460 pigs, including 416 from 74 piggeries and 44 from Makurdi slaughter slab. The samples were analysed using indirect enzyme-linked immunosorbent assay (ELISA) test kit to detect the presence of ASFV antibodies, while competitive ELISA test kit was used to detect antibodies to CSFV. Our findings showed a total ASF prevalence of 13 (2...
November 6, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29102127/transmission-of-african-swine-fever-virus-from-infected-pigs-by-direct-contact-and-aerosol-routes
#19
Ann Sofie Olesen, Louise Lohse, Anette Boklund, Tariq Halasa, Carmina Gallardo, Zygmunt Pejsak, Graham J Belsham, Thomas Bruun Rasmussen, Anette Bøtner
In 2014, African swine fever virus (ASFV) was introduced into the Baltic states and Poland. Since then, the disease has continued to spread within these regions, and recently, cases were reported in the Czech Republic and Romania. Currently, there is an increasing risk of ASFV introduction into Western Europe. Hence, there is an urgent need to assess current contingency plans. For this purpose, knowledge of modes-of-transmission and clinical outcome in pigs infected with new European ASFV strains is needed...
November 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/29081590/a-recombinase-polymerase-amplification-based-assay-for-rapid-detection-of-african-swine-fever-virus
#20
Jianchang Wang, Jinfeng Wang, Yunyun Geng, Wanzhe Yuan
A recombinase polymerase amplification (RPA)-based method was developed for rapid and specific detection of African swine fever virus (ASFV), the etiologic agent of African swine fever, a devastating disease of swine. Primers and the exo probe targeting the conserved region of the P72 gene of ASFV were designed and the reaction was run on the Genie III scanner device. Using recombinant plasmid DNA containing the P72 gene as template, we showed that the amplified product could be detected in less than 10 min and that the detection limit was 10(2) copies DNA/reaction [same detection limit as real-time polymerase chain reaction (PCR)]...
October 2017: Canadian Journal of Veterinary Research, Revue Canadienne de Recherche Vétérinaire
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