Investigation into the Epidemiology of African Swine Fever Virus at the Wildlife - Domestic Interface of the Gorongosa National Park, Central Mozambique.
Identifieur interne : 001A75 ( PubMed/Corpus ); précédent : 001A74; suivant : 001A76Investigation into the Epidemiology of African Swine Fever Virus at the Wildlife - Domestic Interface of the Gorongosa National Park, Central Mozambique.
Auteurs : C J Quembo ; F. Jori ; L. Heath ; R. Pérez-Sánchez ; W. VoslooSource :
- Transboundary and emerging diseases [ 1865-1682 ] ; 2016.
English descriptors
- KwdEn :
- MESH :
- chemical , blood : Antibodies.
- epidemiology : African Swine Fever, Mozambique.
- immunology : African Swine Fever Virus.
- virology : Sus scrofa, Swine.
- Animals, Parks, Recreational.
Abstract
An epidemiological study of African swine fever (ASF) was conducted between March 2006 and September 2007 in a rural area adjacent to the Gorongosa National park (GNP) located in the Central Mozambique. Domestic pigs and warthogs were sampled to determine the prevalence of antibodies against ASF virus and the salivary antigens of Ornithodoros spp. ticks, while ticks collected from pig pens were tested for the presence of ASFV. In addition, 310 framers were interviewed to gain a better understanding of the pig value chain and potential practices that could impact on the spread of the virus. The sero-prevalence to ASFV was 12.6% on farms and 9.1% in pigs, while it reached 75% in warthogs. Approximately 33% of pigs and 78% of warthogs showed antibodies against salivary antigens of ticks. The differences in sero-prevalence between farms close to the GNP, where there is greater chance for the sylvatic cycle to cause outbreaks, and farms located in the rest of the district, where pig to pig transmission is more likely to occur, were marginally significant. Ornithodoros spp. ticks were found in only 2 of 20 pig pens outside the GNP, and both pens had ticks testing positive for ASFV DNA. Interviews carried out among farmers indicated that biosecurity measures were mostly absent. Herd sizes were small with pigs kept in a free-ranging husbandry system (65%). Only 1.6% of farmers slaughtered on their premises, but 51% acknowledged allowing visitors into their farms to purchase pigs. ASF outbreaks seemed to have a severe economic impact with nearly 36% of farmers ceasing pig farming for at least 1 year after a suspected ASF outbreak. This study provides the first evidence of the existence of a sylvatic cycle in Mozambique and confirms the presence of a permanent source of virus for the domestic pig value chain.
DOI: 10.1111/tbed.12289
PubMed: 25483914
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Investigation into the Epidemiology of African Swine Fever Virus at the Wildlife - Domestic Interface of the Gorongosa National Park, Central Mozambique.</title><author><name sortKey="Quembo, C J" sort="Quembo, C J" uniqKey="Quembo C" first="C J" last="Quembo">C J Quembo</name><affiliation><nlm:affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</nlm:affiliation></affiliation></author><author><name sortKey="Jori, F" sort="Jori, F" uniqKey="Jori F" first="F" last="Jori">F. Jori</name><affiliation><nlm:affiliation>UPR AGIRs, CIRAD, Montpellier, France.</nlm:affiliation></affiliation></author><author><name sortKey="Heath, L" sort="Heath, L" uniqKey="Heath L" first="L" last="Heath">L. Heath</name><affiliation><nlm:affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</nlm:affiliation></affiliation></author><author><name sortKey="Perez Sanchez, R" sort="Perez Sanchez, R" uniqKey="Perez Sanchez R" first="R" last="Pérez-Sánchez">R. Pérez-Sánchez</name><affiliation><nlm:affiliation>Instituto de Recursos Naturales y Agrobiologia de Salamanca (IRNASA), CSIC, Salamanca, Spain.</nlm:affiliation></affiliation></author><author><name sortKey="Vosloo, W" sort="Vosloo, W" uniqKey="Vosloo W" first="W" last="Vosloo">W. Vosloo</name><affiliation><nlm:affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2016">2016</date><idno type="RBID">pubmed:25483914</idno><idno type="pmid">25483914</idno><idno type="doi">10.1111/tbed.12289</idno><idno type="wicri:Area/PubMed/Corpus">001A75</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">001A75</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Investigation into the Epidemiology of African Swine Fever Virus at the Wildlife - Domestic Interface of the Gorongosa National Park, Central Mozambique.</title><author><name sortKey="Quembo, C J" sort="Quembo, C J" uniqKey="Quembo C" first="C J" last="Quembo">C J Quembo</name><affiliation><nlm:affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</nlm:affiliation></affiliation></author><author><name sortKey="Jori, F" sort="Jori, F" uniqKey="Jori F" first="F" last="Jori">F. Jori</name><affiliation><nlm:affiliation>UPR AGIRs, CIRAD, Montpellier, France.</nlm:affiliation></affiliation></author><author><name sortKey="Heath, L" sort="Heath, L" uniqKey="Heath L" first="L" last="Heath">L. Heath</name><affiliation><nlm:affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</nlm:affiliation></affiliation></author><author><name sortKey="Perez Sanchez, R" sort="Perez Sanchez, R" uniqKey="Perez Sanchez R" first="R" last="Pérez-Sánchez">R. Pérez-Sánchez</name><affiliation><nlm:affiliation>Instituto de Recursos Naturales y Agrobiologia de Salamanca (IRNASA), CSIC, Salamanca, Spain.</nlm:affiliation></affiliation></author><author><name sortKey="Vosloo, W" sort="Vosloo, W" uniqKey="Vosloo W" first="W" last="Vosloo">W. Vosloo</name><affiliation><nlm:affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Transboundary and emerging diseases</title><idno type="eISSN">1865-1682</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>African Swine Fever (epidemiology)</term><term>African Swine Fever Virus (immunology)</term><term>Animals</term><term>Antibodies (blood)</term><term>Mozambique (epidemiology)</term><term>Parks, Recreational</term><term>Sus scrofa (virology)</term><term>Swine (virology)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="blood" xml:lang="en"><term>Antibodies</term></keywords><keywords scheme="MESH" qualifier="epidemiology" xml:lang="en"><term>African Swine Fever</term><term>Mozambique</term></keywords><keywords scheme="MESH" qualifier="immunology" xml:lang="en"><term>African Swine Fever Virus</term></keywords><keywords scheme="MESH" qualifier="virology" xml:lang="en"><term>Sus scrofa</term><term>Swine</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Parks, Recreational</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">An epidemiological study of African swine fever (ASF) was conducted between March 2006 and September 2007 in a rural area adjacent to the Gorongosa National park (GNP) located in the Central Mozambique. Domestic pigs and warthogs were sampled to determine the prevalence of antibodies against ASF virus and the salivary antigens of Ornithodoros spp. ticks, while ticks collected from pig pens were tested for the presence of ASFV. In addition, 310 framers were interviewed to gain a better understanding of the pig value chain and potential practices that could impact on the spread of the virus. The sero-prevalence to ASFV was 12.6% on farms and 9.1% in pigs, while it reached 75% in warthogs. Approximately 33% of pigs and 78% of warthogs showed antibodies against salivary antigens of ticks. The differences in sero-prevalence between farms close to the GNP, where there is greater chance for the sylvatic cycle to cause outbreaks, and farms located in the rest of the district, where pig to pig transmission is more likely to occur, were marginally significant. Ornithodoros spp. ticks were found in only 2 of 20 pig pens outside the GNP, and both pens had ticks testing positive for ASFV DNA. Interviews carried out among farmers indicated that biosecurity measures were mostly absent. Herd sizes were small with pigs kept in a free-ranging husbandry system (65%). Only 1.6% of farmers slaughtered on their premises, but 51% acknowledged allowing visitors into their farms to purchase pigs. ASF outbreaks seemed to have a severe economic impact with nearly 36% of farmers ceasing pig farming for at least 1 year after a suspected ASF outbreak. This study provides the first evidence of the existence of a sylvatic cycle in Mozambique and confirms the presence of a permanent source of virus for the domestic pig value chain.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25483914</PMID><DateCreated><Year>2016</Year><Month>07</Month><Day>01</Day></DateCreated><DateCompleted><Year>2017</Year><Month>01</Month><Day>19</Day></DateCompleted><DateRevised><Year>2017</Year><Month>01</Month><Day>19</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1865-1682</ISSN><JournalIssue CitedMedium="Internet"><Volume>63</Volume><Issue>4</Issue><PubDate><Year>2016</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Transboundary and emerging diseases</Title><ISOAbbreviation>Transbound Emerg Dis</ISOAbbreviation></Journal><ArticleTitle>Investigation into the Epidemiology of African Swine Fever Virus at the Wildlife - Domestic Interface of the Gorongosa National Park, Central Mozambique.</ArticleTitle><Pagination><MedlinePgn>443-51</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/tbed.12289</ELocationID><Abstract><AbstractText>An epidemiological study of African swine fever (ASF) was conducted between March 2006 and September 2007 in a rural area adjacent to the Gorongosa National park (GNP) located in the Central Mozambique. Domestic pigs and warthogs were sampled to determine the prevalence of antibodies against ASF virus and the salivary antigens of Ornithodoros spp. ticks, while ticks collected from pig pens were tested for the presence of ASFV. In addition, 310 framers were interviewed to gain a better understanding of the pig value chain and potential practices that could impact on the spread of the virus. The sero-prevalence to ASFV was 12.6% on farms and 9.1% in pigs, while it reached 75% in warthogs. Approximately 33% of pigs and 78% of warthogs showed antibodies against salivary antigens of ticks. The differences in sero-prevalence between farms close to the GNP, where there is greater chance for the sylvatic cycle to cause outbreaks, and farms located in the rest of the district, where pig to pig transmission is more likely to occur, were marginally significant. Ornithodoros spp. ticks were found in only 2 of 20 pig pens outside the GNP, and both pens had ticks testing positive for ASFV DNA. Interviews carried out among farmers indicated that biosecurity measures were mostly absent. Herd sizes were small with pigs kept in a free-ranging husbandry system (65%). Only 1.6% of farmers slaughtered on their premises, but 51% acknowledged allowing visitors into their farms to purchase pigs. ASF outbreaks seemed to have a severe economic impact with nearly 36% of farmers ceasing pig farming for at least 1 year after a suspected ASF outbreak. This study provides the first evidence of the existence of a sylvatic cycle in Mozambique and confirms the presence of a permanent source of virus for the domestic pig value chain.</AbstractText><CopyrightInformation>© 2014 Blackwell Verlag GmbH.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Quembo</LastName><ForeName>C J</ForeName><Initials>CJ</Initials><AffiliationInfo><Affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Veterinary Tropical Diseases, Faculty of Veterinary Sciences, University of Pretoria, Pretoria, South Africa.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Laboratório Regional de Veterinária em Chimoio, Centro Zonal de Investigação Agrária da Zona Centro, Instituto de Investigação Agrária de Moçambique, Chimoio, Mozambique.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Jori</LastName><ForeName>F</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>UPR AGIRs, CIRAD, Montpellier, France.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Zoology & Entomology, Mammal Research Institute, University of Pretoria, Pretoria, South Africa.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Animal Science and Production, Botswana College of Agriculture, Gaborone, Botswana.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Heath</LastName><ForeName>L</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pérez-Sánchez</LastName><ForeName>R</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>Instituto de Recursos Naturales y Agrobiologia de Salamanca (IRNASA), CSIC, Salamanca, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Vosloo</LastName><ForeName>W</ForeName><Initials>W</Initials><AffiliationInfo><Affiliation>Transboundary Animal Disease Program, Onderstepoort Veterinary Institute, Pretoria, South Africa.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Department of Veterinary Tropical Diseases, Faculty of Veterinary Sciences, University of Pretoria, Pretoria, South Africa.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Australian Animal Health Laboratory, Geelong, Vic., Australia.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>12</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Transbound Emerg 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MajorTopicYN="N">Mozambique</DescriptorName><QualifierName UI="Q000453" MajorTopicYN="N">epidemiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D000068316" MajorTopicYN="N">Parks, Recreational</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D034421" MajorTopicYN="N">Sus scrofa</DescriptorName><QualifierName UI="Q000821" MajorTopicYN="N">virology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013552" MajorTopicYN="N">Swine</DescriptorName><QualifierName UI="Q000821" MajorTopicYN="N">virology</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">ticks</Keyword><Keyword MajorTopicYN="N">veterinary epidemiology</Keyword><Keyword MajorTopicYN="N">virus</Keyword><Keyword MajorTopicYN="N">wildlife</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2012</Year><Month>10</Month><Day>29</Day></PubMedPubDate><PubMedPubDate 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