scholarly journals Rynek mięsa wieprzowego w Polsce w obliczu afrykańskiego pomoru świń (ASF)

2018 ◽  
Vol 18(33) (3) ◽  
pp. 306-314
Author(s):  
Mirosława Tereszczuk
Keyword(s):  
Negative Impact ◽  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Fever Virus ◽  
First Year ◽  
Upward Trend ◽  
Wild Boars ◽  
Central Poland ◽  
The Impact ◽  
Descriptive Method

The aim of the study is to assess the impact of African swine fever virus (ASF) on the development and functioning of the pork market in Poland. This virus appeared in Poland in February 2014 in wild boars, and then in July 2014 in pigs. The study covers the years 2014-2018, the period of ASF virus in Poland. By the end of July 2018, there were 182 cases of ASF in pigs and over 2.6 thousand in wild boars in four provinces of eastern and central Poland, and the largest cluster of this disease is located in the Lublin province. The appearance of ASF virus has had a negative impact on the pork market in Poland, resulting in restrictions on the export of this meat, costs of eradication of outbreaks and biosecurity. Despite these difficulties, the production of pork at this time was characterized by an upward trend, while exports only in the first year of the ASF decreased, but in subsequent years, due to the diversification of markets, there was an increase in exports. The descriptive method and simple statistical analyzes were used for the study.

scholarly journals Estimation of the transmission dynamics of African swine fever virus within a swine house

2017 ◽  
Vol 145 (13) ◽  
pp. 2787-2796 ◽  
Author(s):  
J. P. NIELSEN ◽  
T. S. LARSEN ◽  
T. HALASA ◽  
L. E. CHRISTIANSEN
Keyword(s):  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Simulation Models ◽  
Fever Virus ◽  
Economic Consequences ◽  
Estimation Of Parameters ◽  
Swine Industry ◽  
Transmission Parameters ◽  
The Individual ◽  
The Impact

SUMMARYThe 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. As animals were only tested every other day, an interpretation was introduced to cover the weighted infectiousness on unobserved days for the individual animals (WIU). Based on our model and the set of assumptions, the within- and between-pen transmission parameters were estimated to βw = 1·05 (95% CI 0·62–1·72), βb = 0·46 (95% CI 0·17–1·00), respectively, and the WIU = 1·00 (95% CI 0–1). Furthermore, we simulated the spread of ASFV within a pig house using a modified SEIR-model to establish the time from infection of one animal until ASFV is detected in the herd. Based on a chosen detection limit of 2·55% equivalent to 10 dead pigs out of 360, the disease would be detected 13–19 days after introduction.

scholarly journals Polymerase cross-linking spiral reaction (PCLSR) for detection of African swine fever virus (ASFV) in pigs and wild boars

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Grzegorz Woźniakowski ◽  
Magdalena Frączyk ◽  
Andrzej Kowalczyk ◽  
Małgorzata Pomorska-Mól ◽  
Krzysztof Niemczuk ◽  
...  
Keyword(s):  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Fever Virus ◽  
Cross Linking ◽  
Wild Boars

scholarly journals African swine fever virus infection in Classical swine fever subclinically infected wild boars

2017 ◽  
Vol 13 (1) ◽  
Author(s):  
Oscar Cabezón ◽  
Sara Muñoz-González ◽  
Andreu Colom-Cadena ◽  
Marta Pérez-Simó ◽  
Rosa Rosell ◽  
...  
Keyword(s):  
Virus Infection ◽  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Classical Swine Fever ◽  
Fever Virus ◽  
Wild Boars

scholarly journals High Virulence of African Swine Fever Virus Caucasus Isolate in European Wild Boars of All Ages

2012 ◽  
Vol 18 (4) ◽  
Author(s):  
Sandra Blome ◽  
Claudia Gabriel ◽  
Klaas Dietze ◽  
Angele Breithaupt ◽  
Martin Beer
Keyword(s):  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Fever Virus ◽  
Wild Boars ◽  
High Virulence

scholarly journals A stochastic network-based model to simulate farm-level transmission of African swine fever virus in Vietnam

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0247770
Author(s):  
Hu Suk Lee ◽  
Krishna K. Thakur ◽  
Long Pham-Thanh ◽  
Tung Duy Dao ◽  
Anh Ngoc Bui ◽  
...  
Keyword(s):  
Disease Transmission ◽  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Median Number ◽  
Fever Virus ◽  
Farm Level ◽  
Basic Model ◽  
Virus Dose ◽  
Trading Partners ◽  
The Impact

African swine fever virus is highly contagious, and mortality rates reach up to 100% depending on the host, virus dose, and the transmission routes. The main objective of this study was to develop a network-based simulation model for the farm-level transmission of ASF virus to evaluate the impact of changes in farm connectivity on ASF spread in Vietnam. A hypothetical population of 1,000 pig farms was created and used for the network-based simulation, where each farm represented a node, and the connection between farms represented an edge. The three scenarios modelled in this way (baseline, low, and high) evaluated the impact of connectivity on disease transmission. The median number of infected farms was higher as the connectivity increased (low: 659, baseline: 968 and high: 993). In addition, we evaluated the impact of the culling strategy on the number of infected farms. A total of four scenarios were simulated depending on the timing of culling after a farm was infected. We found that the timing of culling at 16, 12, 8, and 6 weeks had resulted in a reduction of the number of median infected farms by 81.92%, 91.63%, 100%, and 100%, respectively. Finally, our evaluation of the implication of stability of ties between farms indicated that if the farms were to have the same trading partners for at least six months could significantly reduce the median number of infected farms to two (95th percentile: 413) than in the basic model. Our study showed that pig movements among farms had a significant influence on the transmission dynamics of ASF virus. In addition, we found that the either timing of culling, reduction in the number of trading partners each farm had, or decreased mean contact rate during the outbreaks were essential to prevent or stop further outbreaks.

scholarly journals Swift and Reliable “Easy Lab” Methods for the Sensitive Molecular Detection of African Swine Fever Virus

2021 ◽  
Vol 22 (5) ◽  
pp. 2307
Author(s):  
Ahmed Elnagar ◽  
Jutta Pikalo ◽  
Martin Beer ◽  
Sandra Blome ◽  
Bernd Hoffmann
Keyword(s):  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Fever Virus ◽  
Molecular Diagnostic ◽  
Economic Losses ◽  
Hemorrhagic Disease ◽  
Tissue Samples ◽  
Wild Boars ◽  
Field Samples ◽  
Edta Blood

African swine fever (ASF) is a contagious viral hemorrhagic disease of domestic pigs and wild boars. The disease is notifiable to the World Organisation for Animal Health (OIE) and is responsible for high mortality and serious economic losses. PCR and real-time PCR (qPCR) are the OIE-recommended standard methods for the direct detection of African swine fever virus (ASFV) DNA. The aim of our work was the simplification and standardization of the molecular diagnostic workflow in the lab. For validation of this “easy lab” workflow, different sample materials from animal trials were collected and analyzed (EDTA blood, serum, oral swabs, chewing ropes, and tissue samples) to identify the optimal sample material for diagnostics in live animals. Based on our data, the EDTA blood samples or bloody tissue samples represent the best specimens for ASFV detection in the early and late phases of infection. The application of prefilled ready-to-use reagents for nucleic acid extraction or the use of a Tissue Lysis Reagent (TLR) delivers simple and reliable alternatives for the release of the ASFV nucleic acids. For the qPCR detection of ASFV, different published and commercial kits were compared. Here, a lyophilized commercial kit shows the best results mainly based on the increased template input. The good results of the “easy lab” strategy could be confirmed by the ASFV detection in field samples from wild boars collected from the 2020 ASFV outbreak in Germany. Appropriate internal control systems for extraction and PCR are key features of the “easy lab” concept and reduce the risk of false-negative and false-positive results. In addition, the use of easy-to-handle machines and software reduces training efforts and the misinterpretation of results. The PCR diagnostics based on the “easy lab” strategy can realize a high sensitivity and specificity comparable to the standard PCR methods and should be especially usable for labs with limited experiences and resources.

scholarly journals Characteristics of African Swine Fever Virus Isolated from Domestic Pigs and Wild Boars in the Russian Federation and South Ossetia

2020 ◽  
Vol 70 (1) ◽  
pp. 58-70
Author(s):  
Mikhail Vlasov ◽  
Almaz Imatdinov ◽  
Ilya Titov ◽  
Nikola Vasković ◽  
Valentina Lyska ◽  
...  
Keyword(s):  
Russian Federation ◽  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Fever Virus ◽  
Genetic Characteristics ◽  
South Ossetia ◽  
Wild Boars ◽  
Domestic Pigs ◽  
Irkutsk Region ◽  
The Russian Federation

AbstractThe article presents the results of a comparative study of the biological, molecular and genetic characteristics of African swine fever virus (ASFV) isolates, obtained from domestic pigs and wild boars in the Russian Federation and South Ossetia from 2016 to 2018. The studied isolates caused the death of pigs manifesting, as a rule, signs of an acute or subacute form of the disease when using various methods of infection including intramuscular, direct contact, intranasal and oral routes. The virus was hemadsorbing, belonging to serotype 8 and genotype II, and accumulated in the blood with a titer of 6.5 to 7.5 lg HAU50/cm3. The ASFV isolates circulating in the central region of Russia were found to have an insertion of 10 base pairs in the intergenic region I73R/I329L. However, the ASFV isolated in the Irkutsk region and South Ossetia, as well as Georgia 2007/1 (FR682468.1), lacked this insertion.

scholarly journals Food Security and Research Agenda in African Swine Fever Virus: a new Arbovirus Threat in the Dominican Republic

2021 ◽  
Vol 4 ◽  
Author(s):  
Robert Paulino-Ramirez
Keyword(s):  
Food Security ◽  
Dominican Republic ◽  
Research Agenda ◽  
African Swine Fever Virus ◽  
African Swine Fever ◽  
Fever Virus ◽  
Ecological Niches ◽  
Emerging Pathogens ◽  
The Impact

An outbreak of African Swine Fever Virus (ASFV) has been reported in La Hispaniola. Ecological niches of transmission and further characterization of vectors involved should be included in a research agenda to reduce the impact on emerging pathogens affecting food security in a previous afflicted region.

scholarly journals The impact of African Swine Fever Virus on smallholder village pig production: an outbreak investigation in Lao PDR

2021 ◽  
Author(s):  
Nina Matsumoto ◽  
J Siengsanan-Lamont ◽  
Tariq Halasa ◽  
James Young ◽  
Michael Ward ◽  
...  
Keyword(s):  
Risk Factors ◽  
Wild Boar ◽  
Spatial Clustering ◽  
African Swine Fever Virus ◽  
Lao Pdr ◽  
Clinical Signs ◽  
African Swine Fever ◽  
Fever Virus ◽  
Free Ranging ◽  
The Impact

African Swine Fever Virus (ASFV) causes a deadly disease of pigs which spread through southeast Asia in 2019. We investigated one of the first outbreaks of ASFV in Lao Peoples Democratic Republic amongst smallholder villages of Thapangtong District, Savannakhet Province. In this study, two ASFV affected villages were compared to two unaffected villages. Evidence of ASFV-like clinical signs appeared in pig herds as early as May 2019, with median epidemic days on 1 and 18 June in the two villages, respectively. Using participatory epidemiology mapping techniques, we found statistically significant spatial clustering in both outbreaks (P < 0.001). Villagers reported known risk factors for ASFV transmission  such as free-ranging management systems and wild boar access  in all four villages. The villagers reported increased pig trader activity from Vietnam before the outbreaks; however, the survey did not determine a single outbreak source. The outbreak caused substantial household financial losses with an average of 9 pigs lost to the disease, and Monte Carlo analysis estimated this to be USD 215 per household. ASFV poses a significant threat to food and financial security in smallholder communities such as Thapangtong, where 40.6% of the district’s population are affected by poverty. This study shows ASFV management in the region will require increased local government resources, knowledge of informal trader activity and wild boar monitoring alongside education and support to address intra-village risk factors such as free-ranging, correct waste disposal and swill feeding.

scholarly journals The impact of African Swine Fever Virus on smallholder village pig production: an outbreak investigation in Lao PDR

2021 ◽  
Author(s):  
Nina Matsumoto ◽  
J Siengsanan-Lamont ◽  
Tariq Halasa ◽  
James Young ◽  
Michael Ward ◽  
...  
Keyword(s):  
Risk Factors ◽  
Wild Boar ◽  
Spatial Clustering ◽  
African Swine Fever Virus ◽  
Lao Pdr ◽  
Clinical Signs ◽  
African Swine Fever ◽  
Fever Virus ◽  
Free Ranging ◽  
The Impact

African Swine Fever Virus (ASFV) causes a deadly disease of pigs which spread through southeast Asia in 2019. We investigated one of the first outbreaks of ASFV in Lao Peoples Democratic Republic amongst smallholder villages of Thapangtong District, Savannakhet Province. In this study, two ASFV affected villages were compared to two unaffected villages. Evidence of ASFV-like clinical signs appeared in pig herds as early as May 2019, with median epidemic days on 1 and 18 June in the two villages, respectively. Using participatory epidemiology mapping techniques, we found statistically significant spatial clustering in both outbreaks (P < 0.001). Villagers reported known risk factors for ASFV transmission − such as free-ranging management systems and wild boar access − in all four villages. The villagers reported increased pig trader activity from Vietnam before the outbreaks; however, the survey did not determine a single outbreak source. The outbreak caused substantial household financial losses with an average of 9 pigs lost to the disease, and Monte Carlo analysis estimated this to be USD 215 per household. ASFV poses a significant threat to food and financial security in smallholder communities such as Thapangtong, where 40.6% of the district’s population are affected by poverty. This study shows ASFV management in the region will require increased local government resources, knowledge of informal trader activity and wild boar monitoring alongside education and support to address intra-village risk factors such as free-ranging, incorrect waste disposal and swill feeding.

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