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

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dc.contributor.author Del Rio Lopez, R.
dc.contributor.author Miranda, M.A.
dc.contributor.author Paredes-Esquivel, C.
dc.contributor.author Lucientes, J.
dc.contributor.author Calvete, C.
dc.contributor.author Estrada, R.
dc.contributor.author Venter, Gert Johannes
dc.date.accessioned 2012-09-03T10:16:52Z
dc.date.available 2013-06-30T00:20:05Z
dc.date.issued 2012-06
dc.description.abstract Bluetongue (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.librarian ab2012 en
dc.description.sponsorship The 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.uri http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2915 en
dc.identifier.citation Del 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.issn 0269-283X (print)
dc.identifier.issn 1365-2915 (online)
dc.identifier.other 10.1111/j.1365-2915.2011.00990.x
dc.identifier.uri http://hdl.handle.net/2263/19689
dc.language.iso en en
dc.publisher Wiley-Blackwell en
dc.relation.requires Adobe Acrobat Reader en
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.subject Culicoides imicola en
dc.subject Infection rate en
dc.subject Oral susceptibility en
dc.subject Vector capability en
dc.subject.lcsh Bluetongue virus -- South Africa en
dc.subject.lcsh Culicoides en
dc.title Recovery rates of bluetongue virus serotypes 1, 2, 4 and 8 Spanish strains from orally infected Culicoides imicola in South Africa en
dc.type Postprint Article en


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