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Volume 16, Number 5—May 2010

Dispatch

Bluetongue Virus in Wild Deer, Belgium, 2005–2008

Annick LindenComments to Author , Fabien Grégoire, Adrien Nahayo, David Hanrez, Bénédicte Mousset, Audrey Laurent Massart, Ilse De Leeuw, Elise Vandemeulebroucke, Frank Vandenbussche, and Kris De Clercq
Author affiliations: University of Liège, Liège, Belgium (A. Linden, F. Grégoire, A. Nahayo, D. Hanrez, B. Mousset, L. Massart); Veterinary and Agrochemical Research Centre, Ukkel, Belgium (I. De Leeuw, E. Vandemeulebroucke, F. Vandenbussche, K. De Clercq)

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Table

Seroprevalence of bluetongue virus among red deer, by age and study area, Belgium, 2006–2008*

Characteristic 2006
2007
2008
No. positive/
no. tested (%) 95% CI No. positive/
no. tested (%) 95% CI No. positive/
no. tested (%) 95% CI
Age†
Adults 4/221 (1.81) 0.05–3.57 142/216 (65.74) 59.41–72.07 111/185 (60.00) 52.94–67.06
Subadults 1/59 (1.69) 0.00–4.99 45/82 (54.88) 44.11–65.65 27/75 (36.00) 25.14–46.86
Juveniles 2/178 (1.12) 0.00–2.67 80/213 (37.56) 31.06–44.06 11/191 (5.76) 2.46–9.06
Area‡
Eastern ND ND 81/161 (50.31) 42.59–58.03 43/123 (34.96) 26.53–43.39
Central ND ND 103/154 (66.88) 59.45–74.32 61/135 (45.19) 36.79–53.58
Southern ND ND 32/105 (30.48) 21.67–39.28 27/133 (20.30) 13.46–27.14

*CI, confidence interval; ND, not determined.
†Adults, >2 y of age; subadults, 1–2 y of age; juveniles, <1 y of age.
‡Fourteen forest districts were distributed among 3 nonadjacent areas, 5 in the eastern area, 4 in the central area, and 5 in the southern area.

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