References of "Defrance, T"
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See detailBreeding Sites Of Bluetongue Vectors In Northern Europe
Zimmer, Jean-Yves ULg; Haubruge, Eric ULg; Francis, Frédéric ULg et al

in Veterinary Record : Journal of the British Veterinary Association (2008), 162(4), 131

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See detailDistribution Of Potential Bluetongue Vectors On Belgium Farms
Zimmer, Jean-Yves ULg; Haubruge, Eric ULg; Francis, Frédéric ULg et al

in Veterinary Record : Journal of the British Veterinary Association (2008), 162(21), 700

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See detailCulicoides trapping with Rothamsted suction traps before and during the bluetongue epidemic of 2006 in Belgium.
Fassotte, C.; Delecolle, J. C.; Cors, R. et al

in Preventive Veterinary Medicine (2008), 87(1-2), 74-83

The collection of biting midges was taking place some months before the first bluetongue outbreak in Belgium in August 2006. The Walloon Agricultural Research Centre had been monitoring aphid populations ... [more ▼]

The collection of biting midges was taking place some months before the first bluetongue outbreak in Belgium in August 2006. The Walloon Agricultural Research Centre had been monitoring aphid populations at two sites annually in Belgium (Gembloux and Libramont), using two stationary '12-m' Rothamsted suction traps. For the Gembloux trap, collections of insects captured daily from 11 May 2006 onwards were already available at the time of the outbreak. An examination of these samples revealed the presence of Culicoides, some species of which are considered as potential vectors of the bluetongue virus (BTV). The trapping was therefore extended beyond the normal aphid activity period and the Culicoides captured were identified to species level. From 11 May to 31 December 2006, the Gembloux trap caught 664 Culicoides specimens belonging to 19 species comprising known BTV-vectors. The second trap, at Libramont, was reactivated from 12 September to 13 October and caught 97 specimens belonging to nine species, all of which had been found at the Gembloux site. Among the 19 species identified, four were new to Belgian fauna: Culicoides achrayi, C. deltus, C. lupicaris and C. newsteadi. This paper examines the overall phenology and the physiological status of Culicoides in 2006 before and during the bluetongue epidemic. It discusses the potential of the Rothamsted suction trap to monitor Culicoides. [less ▲]

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See detailBiting Midges Overwintering In Belgium
Losson, Bertrand ULg; Mignon, Bernard ULg; Paternostre, Julien ULg et al

in Veterinary Record : Journal of the British Veterinary Association (2007), 160(13), 451-452

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See detailModulation of B lymphocyte proliferation inside the germinal center.
Bosseloir, A. L.; Defrance, T.; Bouzahzah, F. et al

in Advances in Experimental Medicine and Biology (1995), 378

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See detailMoabs Mas516 and 5b5, Two Fibroblast Markers, Recognize Human Follicular Dendritic Cells
Bosseloir, A.; Heinen, Ernst ULg; Defrance, T. et al

in Immunology Letters (1994), 42(1-2), 49-54

Follicular dendritic cells (FDC) are only located within follicles of secondary lymphoid tissues. The origin of this peculiar cell type is not clearly defined. To contribute to this study, we applied two ... [more ▼]

Follicular dendritic cells (FDC) are only located within follicles of secondary lymphoid tissues. The origin of this peculiar cell type is not clearly defined. To contribute to this study, we applied two monoclonal antibodies (MAS516 and 5B5) considered as specific for fibroblasts to tonsil cryosections and to isolated follicular dendritic cells. On the basis of an enzyme cocktail digestion of human tonsils and a fractionation procedure on albumin gradients, FDC can be prepared in the form of cell aggregates with associated lymphoid cells. MAS516 reacts with surface membrane molecules expressed by human fibroblasts, tissue macrophages and peripheral blood monocytes. With immunoperoxidase assays on tonsil cryosections connective tissue cells and macrophages are stained. Inside germinal centres, heavy labelling of the light zone was found. The MAS516 staining pattern is very similar to that of specific FDC markers DRC-1 or BU10. All isolated FDC reacted with MAS516 antibody. 5B5, considered as a typical fibroblast marker, reacts with human prolyl-4-hydroxylase which is an intracellular enzyme related to collagen biosynthesis. In cryosections, interfollicular and capsular areas showed 5B5 positive connective tissue fibroblasts. In germinal centres, some cells presenting features of FDC were 5B5 positive. After cell separation, 25%-50% of the isolated FDC were labelled with this antibody. This positivity of some FDC for 5B5 antibody may support the idea of their fibroblastic origin. The combination of observations realized in situ and after cell purification ensured an unequivocal recognition and identification of FDC.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲]

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See detailExpression and function of DRC-1 antigen.
Bosseloir, A. L.; Antoine, Nadine ULg; Heinen, Ernst ULg et al

in Advances in Experimental Medicine and Biology (1994), 355

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