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https://www.readbyqxmd.com/read/28941208/gaps-in-african-swine-fever-analysis-and-priorities
#1
M Arias, C Jurado, C Gallardo, J Fernández-Pinero, J M Sánchez-Vizcaíno
African swine fever (ASF) causes greater sanitary, social and economic impacts on swine herds than many other swine diseases. Although ASF was first described in 1921 and it has affected more than fifty countries in Africa, Europe and South America, several key issues about its pathogenesis, immune evasion and epidemiology remain uncertain. This article reviews the main characteristics of the causative virus, its molecular epidemiology, natural hosts, clinical features, epidemiology and control worldwide. It also identifies and prioritizes gaps in ASF from a horizontal point of view encompassing fields including molecular biology, epidemiology, prevention, diagnosis and vaccine development...
September 22, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28921895/genetic-characterization-of-african-swine-fever-virus-isolates-from-soft-ticks-at-the-wildlife-domestic-interface-in-mozambique-and-identification-of-a-novel-genotype
#2
C J Quembo, F Jori, W Vosloo, L Heath
African swine fever virus (ASFV) is one of the most threatening infectious diseases of pigs. There are not sufficient data to indicate the importance of the sylvatic cycle in the spread and maintenance of the disease locally and potentially, globally. To assess the capacity to maintain ASF in the environment, we investigated the presence of soft tickreservoirs of ASFV in Gorongosa National Park (GNP) and its surrounding villages. A total of 1,658 soft ticks were recovered from warthog burrows and pig pens at the wildlife/livestock interface of the GNP and viral DNA was confirmed by nested PCR in 19% of Ornithodoros porcinus porcinus and 15% of O...
September 17, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28921878/simplifying-sampling-for-african-swine-fever-surveillance-assessment-of-antibody-and-pathogen-detection-from-blood-swabs
#3
J Carlson, L Zani, T Schwaiger, I Nurmoja, A Viltrop, A Vilem, M Beer, S Blome
African swine fever (ASF) is a notifiable disease with serious socio-economic consequences that has been present in wild boar in the Baltic States and Poland since 2014. An introduction of ASF is usually accompanied by increased mortality, making fallen wild boar and hunted animals with signs of disease the main target for early warning and passive surveillance. It is difficult, however, to encourage hunters and foresters to report and take samples from these cases. A pragmatic and easy sampling approach with quick-drying swabs could facilitate this...
September 17, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28921873/diagnostic-specificity-of-the-african-swine-fever-virus-antibody-detection-enzyme-linked-immunosorbent-assay-in-feral-and-domestic-pigs-in-the-united-states
#4
H C Bergeron, P S Glas, K R Schumann
African swine fever (ASF) is a highly contagious haemorrhagic disease of pigs that has the potential to cause mortality nearing 100% in naïve animals. While an outbreak of ASF in the United States' pig population (domestic and feral) has never been reported, an introduction of the disease has the potential to cause devastation to the pork industry and food security. During the recovery phase of an outbreak, an antibody detection diagnostic assay would be required to prove freedom of disease within the previously infected zone and eventually nationwide...
September 18, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28916365/sodium-phenylbutyrate-abrogates-african-swine-fever-virus-replication-by-disrupting-the-virus-induced-hypoacetylation-status-of-histone-h3k9-k14
#5
Gonçalo Frouco, Ferdinando B Freitas, Carlos Martins, Fernando Ferreira
African swine fever virus (ASFV) causes a highly lethal disease in swine for which neither a vaccine nor treatment are available. Recently, a new class of drugs that inhibit histone deacetylases enzymes (HDACs) has received an increasing interest as antiviral agents. Considering studies by others showing that valproic acid, an HDAC inhibitor (HDACi), blocks the replication of enveloped viruses and that ASFV regulates the epigenetic status of the host cell by promoting heterochromatinization and recruitment of class I HDACs to viral cytoplasmic factories, the antiviral activity of four HDACi against ASFV was evaluated in this study...
September 13, 2017: Virus Research
https://www.readbyqxmd.com/read/28885709/prenylation-of-viral-proteins-by-enzymes-of-the-host-virus-driven-rationale-for-therapy-with-statins-and-ft-ggt1-inhibitors
#6
REVIEW
Ekaterina S Marakasova, Birgit Eisenhaber, Sebastian Maurer-Stroh, Frank Eisenhaber, Ancha Baranova
Intracellular bacteria were recently shown to employ eukaryotic prenylation system for modifying activity and ensuring proper intracellular localization of their own proteins. Following the same logic, the proteins of viruses may also serve as prenylation substrates. Using extensively validated high-confidence prenylation predictions by PrePS with a cut-off for experimentally confirmed farnesylation of hepatitis delta virus antigen, we compiled in silico evidence for several new prenylation candidates, including IRL9 (CMV) and few other proteins encoded by Herpesviridae, Nef (HIV-1), E1A (human adenovirus 1), NS5A (HCV), PB2 (influenza), HN (human parainfluenza virus 3), L83L (African swine fever), MC155R (molluscum contagiosum virus), other Poxviridae proteins, and some bacteriophages of human associated bacteria...
September 8, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28883106/african-swine-fever-in-eastern-europe-the-risk-to-the-uk
#7
(no author information available yet)
This article has been prepared by Helen Roberts of the Defra/APHA International Disease Monitoring team.
September 9, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28877181/motion-based-video-monitoring-for-early-detection-of-livestock-diseases-the-case-of-african-swine-fever
#8
Eduardo Fernández-Carrión, Marta Martínez-Avilés, Benjamin Ivorra, Beatriz Martínez-López, Ángel Manuel Ramos, José Manuel Sánchez-Vizcaíno
Early detection of infectious diseases can substantially reduce the health and economic impacts on livestock production. Here we describe a system for monitoring animal activity based on video and data processing techniques, in order to detect slowdown and weakening due to infection with African swine fever (ASF), one of the most significant threats to the pig industry. The system classifies and quantifies motion-based animal behaviour and daily activity in video sequences, allowing automated and non-intrusive surveillance in real-time...
2017: PloS One
https://www.readbyqxmd.com/read/28871180/phenotyping-and-susceptibility-of-established-porcine-cells-lines-to-african-swine-fever-virus-infection-and-viral-production
#9
Elena G Sánchez, Elena Riera, Marisa Nogal, Carmina Gallardo, Paloma Fernández, Raquel Bello-Morales, José Antonio López-Guerrero, Carol G Chitko-McKown, Jürgen A Richt, Yolanda Revilla
African swine fever virus (ASFV) is a highly pathogenic, double-stranded DNA virus with a marked tropism for cells of the monocyte-macrophage lineage, affecting swine species and provoking severe economic losses and health threats. In the present study, four established porcine cell lines, IPAM-WT, IPAM-CD163, C∆2+ and WSL, were compared to porcine alveolar macrophage (PAM) in terms of surface marker phenotype, susceptibility to ASFV infection and virus production. The virulent ASFV Armenia/07, E70 or the naturally attenuated NHV/P68 strains were used as viral models...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28860602/gene-expression-analysis-of-whole-blood-rna-from-pigs-infected-with-low-and-high-pathogenic-african-swine-fever-viruses
#10
Crystal Jaing, Raymond R R Rowland, Jonathan E Allen, Andrea Certoma, James B Thissen, John Bingham, Brenton Rowe, John R White, James W Wynne, Dayna Johnson, Natasha N Gaudreault, David T Williams
African swine fever virus (ASFV) is a macrophage-tropic virus responsible for ASF, a transboundary disease that threatens swine production world-wide. Since there are no vaccines available to control ASF after an outbreak, obtaining an understanding of the virus-host interaction is important for developing new intervention strategies. In this study, a whole transcriptomic RNA-Seq method was used to characterize differentially expressed genes in pigs infected with a low pathogenic ASFV isolate, OUR T88/3 (OURT), or the highly pathogenic Georgia 2007/1 (GRG)...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28841179/investigations-of-pro-and-anti-apoptotic-factors-affecting-african-swine-fever-virus-replication-and-pathogenesis
#11
REVIEW
Linda K Dixon, Pedro J Sánchez-Cordón, Inmaculada Galindo, Covadonga Alonso
African swine fever virus (ASFV) is a large DNA virus that replicates predominantly in the cell cytoplasm and is the only member of the Asfarviridae family. The virus causes an acute haemorrhagic fever, African swine fever (ASF), in domestic pigs and wild boar resulting in the death of most infected animals. Apoptosis is induced at an early stage during virus entry or uncoating. However, ASFV encodes anti-apoptotic proteins which facilitate production of progeny virions. These anti-apoptotic proteins include A179L, a Bcl-2 family member; A224L, an inhibitor of apoptosis proteins (IAP) family member; EP153R a C-type lectin; and DP71L...
August 25, 2017: Viruses
https://www.readbyqxmd.com/read/28832525/the-epidemiology-of-african-swine-fever-in-nonendemic-regions-of-zambia-1989-2015-implications-for-disease-prevention-and-control
#12
REVIEW
Edgar Simulundu, Caesar H Lubaba, Juanita van Heerden, Masahiro Kajihara, Liywalii Mataa, Herman Moses Chambaro, Yona Sinkala, Samuel Munalula Munjita, Hetron Mweemba Munang'andu, King Shimumbo Nalubamba, Kenny Samui, Girja Shanker Pandey, Ayato Takada, Aaron S Mweene
African swine fever (ASF) is a highly contagious and deadly viral hemorrhagic disease of swine. In Zambia, ASF was first reported in 1912 in Eastern Province and is currently believed to be endemic in that province only. Strict quarantine measures implemented at the Luangwa River Bridge, the only surface outlet from Eastern Province, appeared to be successful in restricting the disease. However, in 1989, an outbreak occurred for the first time outside the endemic province. Sporadic outbreaks have since occurred almost throughout the country...
August 23, 2017: Viruses
https://www.readbyqxmd.com/read/28814514/ba71%C3%AE-cd2-a-new-recombinant-live-attenuated-african-swine-fever-virus-with-cross-protective-capabilities
#13
Paula L Monteagudo, Anna Lacasta, Elisabeth López, Laia Bosch, Javier Collado, Sonia Pina-Pedrero, Florencia Correa-Fiz, Francesc Accensi, María Jesús Navas, Enric Vidal, María J Bustos, Javier M Rodríguez, Andreas Gallei, Veljko Nikolin, María L Salas, Fernando Rodríguez
African swine fever is a highly contagious viral disease of mandatory declaration to the World Organization for Animal Health (OIE). Lack of available vaccines make its control difficult and thus ASFV represents a major threat to the swine industry. Inactivated vaccines do not confer solid protection against African swine fever virus (ASFV). Conversely, live attenuated viruses (LAV), either naturally isolated or obtained by genetic manipulation, have demonstrated reliable protection against homologous ASFV strains, albeit little or no protection has been demonstrated against heterologous viruses...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28807279/acaricidal-activity-of-fluralaner-against-ornithodoros-moubata-and-ornithodoros-erraticus-argasid-ticks-evaluated-through-in-vitro-feeding
#14
R Pérez-Sánchez, A Oleaga
Ornithodoros erraticus and Ornithodoros moubata are argasid tick vectors that transmit severe diseases such as African swine fever and human relapsing fever. Elimination of the synanthropic populations of these vectors would facilitate the control of these diseases. Fluralaner is a novel isoxazoline that selectively blocks the GABA- and glutamate-gated channels, providing potent insecticidal and acaricidal activity. The aim of the current study was to provide quantitative data on the susceptibility of males, females and third nymphal instar of O...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28797058/quantitative-approach-for-the-risk-assessment-of-african-swine-fever-and-classical-swine-fever-introduction-into-the-united-states-through-legal-imports-of-pigs-and-swine-products
#15
Diana María Herrera-Ibatá, Beatriz Martínez-López, Darla Quijada, Kenneth Burton, Lina Mur
The US livestock safety strongly depends on its capacity to prevent the introduction of Transboundary Animal Diseases (TADs). Therefore, accurate and updated information on the location and origin of those potential TADs risks is essential, so preventive measures as market restrictions can be put on place. The objective of the present study was to evaluate the current risk of African swine fever (ASF) and Classical swine fever (CSF) introduction into the US through the legal importations of live pigs and swine products using a quantitative approach that could be later applied to other risks...
2017: PloS One
https://www.readbyqxmd.com/read/28768556/estimation-of-the-transmission-dynamics-of-african-swine-fever-virus-within-a-swine-house
#16
J P Nielsen, T S Larsen, T Halasa, L E Christiansen
The spread of African swine fever virus (ASFV) threatens to reach further parts of Europe. In countries with a large swine production, an outbreak of ASF may result in devastating economic consequences for the swine industry. Simulation models can assist decision makers setting up contingency plans. This creates a need for estimation of parameters. This study presents a new analysis of a previously published study. A full likelihood framework is presented including the impact of model assumptions on the estimated transmission parameters...
August 3, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28764815/a-proteomic-insight-into-the-midgut-proteome-of-ornithodoros-moubata-females-reveals-novel-information-on-blood-digestion-in-argasid-ticks
#17
Ana Oleaga, Prosper Obolo-Mvoulouga, Raúl Manzano-Román, Ricardo Pérez-Sánchez
BACKGROUND: The argasid tick Ornithodoros moubata is the main African vector of the human relapsing fever agent Borrelia duttoni and the African swine fever virus. Together with saliva, the tick midgut forms part of the host-tick-pathogen interface, and numerous midgut proteins play key functions in the blood digestion-related process and the infection and transmission of pathogens. This work explores the composition of the midgut proteome of unfed and fed O. moubata females with the aim to complete the biological information already obtained from the midgut transcriptome and provide a more robust and comprehensive perspective of this biological system...
August 1, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28764692/african-swine-fever-virus-infection-in-classical-swine-fever-subclinically-infected-wild-boars
#18
Oscar Cabezón, Sara Muñoz-González, Andreu Colom-Cadena, Marta Pérez-Simó, Rosa Rosell, Santiago Lavín, Ignasi Marco, Lorenzo Fraile, Paloma Martínez de la Riva, Fernando Rodríguez, Javier Domínguez, Llilianne Ganges
BACKGROUND: Recently moderate-virulence classical swine fever virus (CSFV) strains have been proven capable of generating postnatal persistent infection (PI), defined by the maintenance of viremia and the inability to generate CSFV-specific immune responses in animals. These animals also showed a type I interferon blockade in the absence of clinical signs. In this study, we assessed the infection generated in 7-week-old CSFV PI wild boars after infection with the African swine fever virus (ASFV)...
August 1, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28762629/evaluation-of-blowfly-larvae-diptera-calliphoridae-as-possible-reservoirs-and-mechanical-vectors-of-african-swine-fever-virus
#19
J H Forth, J Amendt, S Blome, K Depner, H Kampen
In 2014, highly virulent African swine fever virus (ASFV) was introduced into the Baltic States and Poland, with new cases being reported almost every week from wild boar and also from domestic pigs. Contrary to initial predictions that the disease would either die out due to the high virulence of the virus strain or spread rapidly in westerly direction, the infection became endemic and spread slowly. The unexpected disease epidemiology led to the hypothesis that hitherto unconsidered factors might contribute to virus persistence and dispersal...
August 1, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28754737/pig-empire-under-infectious-threat-risk-of-african-swine-fever-introduction-into-the-people-s-republic-of-china
#20
Timothée Vergne, Cao Chen-Fu, Shuo Li, Julien Cappelle, John Edwards, Vincent Martin, Dirk Udo Pfeiffer, Guo Fusheng, Francois Louis Roger
Pig production and pork consumption are very important to the People's Republic of China for both economic and cultural reasons. The incursion and spread of a disease such as African swine fever (ASF), which emerged in Eastern Europe in 2007, could have devastating socioeconomic consequences for both the Chinese and the global pig industry. The Chinese government consequently attributes a very high priority to ASF and is actively seeking to improve its preparedness. This paper discusses different drivers and pathways of potential emergence of ASF in China in light of the country's specificities, including international movements of people, pigs and pig products, swill feeding practices and wild boar populations...
July 29, 2017: Veterinary Record
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