Recovery rates of bluetongue virus serotypes 1, 2, 4 and 8 Spanish strains from orally infected Culicoides imicola in South Africa

dc.contributor.authorDel Rio Lopez, R.
dc.contributor.authorMiranda, M.A.
dc.contributor.authorParedes-Esquivel, C.
dc.contributor.authorLucientes, J.
dc.contributor.authorCalvete, C.
dc.contributor.authorEstrada, R.
dc.contributor.authorVenter, Gert Johannes
dc.date.accessioned2012-09-03T10:16:52Z
dc.date.available2013-06-30T00:20:05Z
dc.date.issued2012-06
dc.description.abstractBluetongue (BT) is an infectious disease of ruminants that has spread northwards in Europe during the last decade. The aetiological agent of the disease is an arbovirus [bluetongue virus (BTV)] that belongs to the genus Orbivirus (family Reoviridae). The virus is transmitted by certain species of biting midge within the genus Culicoides (Diptera: Ceratopogonidae). Information on the vector status of the Culicoides species in a specific area will be essential to predict the risk for BTV incursion. Field-collected Culicoides (Avaritia) imicola Kieffer from South Africa were fed on blood containing several Spanish isolates of BTV. Despite the high virus concentrations in the bloodmeal (5.1-6.4 log10 TCID50/mL of blood), virus was recovered from <1% of midges assayed after incubation. Virus concentrations >2.5 log10 TCID50/midge in individual infected C. imicola suggest virus replication with possible risk for transmission to susceptible vertebrate hosts in the field for at least two of the serotypes assayed (BTV-1 and BTV-2). A third serotype (BTV-4) was very close to the estimated threshold for transmission. The relatively low to near refractory status of C. inicola compared with other vector species such as Culicoides bolitinos supports previous results, indicating that Culicoides species other than C. imicola may play a more important role in the epidemiology of BTV.en
dc.description.librarianab2012en
dc.description.sponsorshipThe Conselleria d’Innovacio, Interior i Justicia and the national project ‘Estudio de la Competencia Vectorial de las Especies de Culicoides (Diptera: Ceratopogonidae) Vectores de la Lengua Azul en Espana y Evaluacion de la Hibernacion del Virus en los Vectores’.en
dc.description.urihttp://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2915en
dc.identifier.citationDel Rio Lopez, R, Miranda, MA, Paredes-Esquivel, C, Lucientes, J, Calvete, C, Estrada, R & Venter, GJ 2012, 'Recovery rates of bluetongue virus serotypes 1, 2, 4 and 8 Spanish strains from orally infected Culicoides imicola in South Africa', Medical and Veterinary Entomology, vol. 26, no. 2, pp. 162-167.en
dc.identifier.issn0269-283X (print)
dc.identifier.issn1365-2915 (online)
dc.identifier.other10.1111/j.1365-2915.2011.00990.x
dc.identifier.urihttp://hdl.handle.net/2263/19689
dc.language.isoenen
dc.publisherWiley-Blackwellen
dc.relation.requiresAdobe Acrobat Readeren
dc.rights© 2011 The Authors and The Royal Entomological Society. The definite version is available at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2915.en
dc.subjectCulicoides imicolaen
dc.subjectInfection rateen
dc.subjectOral susceptibilityen
dc.subjectVector capabilityen
dc.subject.lcshBluetongue virus -- South Africaen
dc.subject.lcshCulicoidesen
dc.titleRecovery rates of bluetongue virus serotypes 1, 2, 4 and 8 Spanish strains from orally infected Culicoides imicola in South Africaen
dc.typePostprint Articleen

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