Volume 16, Number 12—December 2010
Research
Anatomy of Bluetongue virus Serotype 8 Epizootic Wave, France, 2007-2008
Benoit Durand
, Gina Zanella, Fabienne Biteau-Coroller, Caroline Locatelli, Florence Baurier, Cécile Simon, Eric Le Dréan, José Delaval, Eric Prengère, Véronique Beauté, and Hélène Guis
, Gina Zanella, Fabienne Biteau-Coroller, Caroline Locatelli, Florence Baurier, Cécile Simon, Eric Le Dréan, José Delaval, Eric Prengère, Véronique Beauté, and Hélène GuisTable 2
Animal-level anti–bluetongue virus serotype 8 seroprevalence rate and distribution of within-herd seroprevalence rates in seropositive herds or flocks of 7 departments, France, winter 2007–2008*
| Species | Department code | No. positive/no. tested | Animal-level seroprevalence (95% CI†) | Median within-herd seroprevalence in seropositive herds (25%–75% quartiles) | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cattle | 08 | 1,563/1,573 | 0.99 (0.99–1.00) | 1.00 (1.00–1.00) | ||||||||||||||||||||
| 18 | 642/1,530 | 0.42 (0.39–0.44) | 0.40 (0.23–0.57) | |||||||||||||||||||||
| 41 | 203/1,500 | 0.16 (0.14–0.17) | 0.15 (0.07–0.27) | |||||||||||||||||||||
| 36 | 103/1,470 | 0.07 (0.06–0.08) | 0.10 (0.07–0.17) | |||||||||||||||||||||
| 37 | 103/1,500 | 0.07 (0.06–0.08) | 0.10 (0.05–0.13) | |||||||||||||||||||||
| 49 | 1/1,410 | 0.001 (0.000–0.003) | 0.03‡ | |||||||||||||||||||||
|
|
35
|
2/905
|
0.002 (0.000–0.007)
|
0.03§
| ||||||||||||||||||||
| Sheep | 08 | 478/833 | 0.57 (0.54–0.61) | 0.70 (0.43–0.87) | ||||||||||||||||||||
| 18 | 19/874 | 0.02 (0.01–0.03) | 0.08 (0.06–0.10) | |||||||||||||||||||||
| 36 | 0/326 | 0.00 (0.00–0.01) | NA | |||||||||||||||||||||
| 35 | 0/432 | 0.00 (0.00–0.01) |
NA
| |||||||||||||||||||||
| *CI, confidence interval; NA, no seropositive flock. | ||||
| †Exact binomial 95% CI. | ||||
| ‡A single seropositive herd. | ||||
|
§Two seropositive herds or flocks with the same within-herd seroprevalence.
|
