Contribution à l'étude des Culicoides de Corse. Liste des espèces recensées en 2000/2001 et redescription du principal vecteur de la fièvre catarrhale ovine : Culicoides imicola Kieffer, 1913 (Diptera, Ceratopogonidae)

AbstractCulicoides imicola is the main vector for bluetongue (BT) and African horse sickness (AHS) viruses in the Mediterranean basin and in southern Europe. In this study, we analysed partial mitochondrial cytochrome c oxidase subunit I (COI) gene to characterize and confirm population expansion of Culicoides imicola across Spain. The data were analysed at two hierarchical levels to test the relationship between C. imicola haplotypes in Spain (n=215 from 58 different locations) and worldwide (n=277). We found nineteen different haplotypes within the Spanish population, including 11 new haplotypes. No matrilineal subdivision was found within the Spanish population, while western and eastern Mediterranean C. imicola populations were very structured. These findings were further supported by median networks and mismatch haplotype distributions. Median networks demonstrated that the haplotypes we observed in the western Mediterranean region were closely related with one another, creating a clear star-like phylogeny separated only by a single mutation from eastern haplotypes. The two, genetically distinct, sources of C. imicola in the Mediterranean basin, thus, were confirmed. This type of star-like population structure centred around the most frequent haplotype is best explained by rapid expansion. Furthermore, the proposed northern expansion was also supported by the statistically negative Tajima's D and Fu's Fs values, as well as predicted mismatch distributions of sudden and spatially expanding populations. Our results thus indicated that C. imicola population expansion was a rapid and recent phenomenon.

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A first estimation of Culicoides imicola and Culicoides obsoletus/Culicoides scoticus seasonality and abundance in Europe

EFSA Supporting Publications ◽

10.2903/sp.efsa.2017.en-1182 ◽

2017 ◽

Vol 14 (2) ◽

Cited By ~ 8

Author(s):

V Versteirt ◽

T Balenghien ◽

W Tack ◽

W Wint

Keyword(s):

Culicoides Obsoletus ◽

Culicoides Imicola

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Modelling the distribution and abundance of Culicoides imicola in Morocco and Iberia using climatic data and satellite imagery

African Horse Sickness ◽

10.1007/978-3-7091-6823-3_14 ◽

1998 ◽

pp. 137-153 ◽

Cited By ~ 7

Author(s):

M. Baylis ◽

P. Rawlings

Keyword(s):

Satellite Imagery ◽

Climatic Data ◽

Culicoides Imicola

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Culicoides biting midges at the National Zoological Gardens of South Africa : research communication

Onderstepoort Journal of Veterinary Research ◽

10.4102/ojvr.v74i4.120 ◽

2007 ◽

Vol 74 (4) ◽

Cited By ~ 8

Author(s):

K. Labuschagne ◽

L.J. Gerber ◽

I. Espie ◽

S. Carpenter

Keyword(s):

South Africa ◽

Vector Competence ◽

Far East ◽

Wild Animals ◽

Light Traps ◽

Biting Midges ◽

Research Communication ◽

Culicoides Imicola ◽

Large Numbers ◽

Culicoides Biting Midges

Culicoides biting midges (Diptera: Ceratopogonidae) are responsible for the transmission of a large number of pathogens to livestock and wild animals. In this study the presence of the genus, using light traps based at four different sites within the National Zoological Gardens of South Africa, was investigated during 2002-2004. In total, 37 species were recorded, including large numbers of Culicoides imicola Kieffer, 1913, which is responsible for the transmission of economically important arboviruses in South Africa, Europe, Middle and Far East. These results are discussed with reference to the wider Culicoides fauna in the Onderstepoort area of South Africa, their vector competence as well as biosecurity at the National Zoological Gardens.

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The influence of temperature and humidity on the flight activity of Culicoides imicola both under laboratory and field conditions

Parasites & Vectors ◽

10.1186/s13071-018-3272-z ◽

2019 ◽

Vol 12 (1) ◽

Cited By ~ 8

Author(s):

Gert J. Venter ◽

Solomon N. B. Boikanyo ◽

Chantel J. de Beer

Keyword(s):

Flight Activity ◽

Field Conditions ◽

Influence Of Temperature ◽

Culicoides Imicola ◽

Temperature And Humidity

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Vector Competence of Italian Populations of Culicoides for Some Bluetongue Virus Strains Responsible for Recent Northern African and European Outbreaks

Viruses ◽

10.3390/v11100941 ◽

2019 ◽

Vol 11 (10) ◽

pp. 941 ◽

Cited By ~ 7

Author(s):

Valentina Federici ◽

Maria Goffredo ◽

Giuseppe Mancini ◽

Michela Quaglia ◽

Adriana Santilli ◽

...

Keyword(s):

Bluetongue Virus ◽

Vector Competence ◽

Oral Infection ◽

Balearic Islands ◽

Rt Pcr ◽

Vector Species ◽

Vaccination Programs ◽

Culicoides Obsoletus ◽

Culicoides Imicola ◽

Virus Strains

The distribution of Bluetongue virus (BTV) in Europe can be represented by two distinct and interconnected epidemiological systems (episystems), each characterized by different ecological characteristics and vector species. This study investigated the vector competence of Italian populations of Culicoides imicola and Culicoides obsoletus/scoticus to some representative BTV strains after artificial oral infection. The BTV strains were selected according to their ability to spread to one or both episystems and included BTV-4 ITA, responsible of the recent Italian and French BTV-4 outbreaks; the BTV-2 strain which caused the first BTV incursion in Italy, Corsica, and Balearic Islands; BTV-4 MOR, responsible for the epidemic in Morocco; and BTV-8, the strain which spread through Europe between 2006 and 2008. Blood-soaked cotton pledgets and Hemotek membrane feeder using Parafilm® membrane were used to artificially feed midges. For each population/strain, recovery rates (positive/tested heads) were evaluated using serogroup- and serotype-specific RT-PCR. The trial demonstrated that, except for the Abruzzo population of C. obsoletus/C. scoticus, which was refractory to BTV-4 MOR infection, all the investigated Culicoides populations are susceptible to the selected BTV strains and that, if prompt vaccination programs and restriction measures had not been implemented, BTV-2 and BTV-4 MOR could have spread all over Europe.

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