Volume 20, Number 6—June 2014
Letter
Schmallenberg Virus Circulation in High Mountain Ecosystem, Spain
Xavier Fernández-Aguilar, Joan Pujols, Roser Velarde, Rosa Rosell, Jorge R. López-Olvera, Ignasi Marco, Marti Pumarola, Joaquim Segalés, Santiago Lavín, Oscar Cabezón
, and Marco
, and Marco
Table
Results of serologic and molecular analyses of SBV in sympatric wild and domestic ruminants, Eastern Pyrenees, Spain, 2010–2013*
| Ruminants and SBV cases | No. animals | SBV serologic testing results |
RT–qPCR | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 |
2011 |
2012 |
2013 |
||||||||||
| Mar–Aug |
Sep–Dec† |
||||||||||||
| Ratio | Ratio | Ratio | Ratio | Prev, % (95% CI) | Ratio | Prev, % (95% CI) | |||||||
| Wild | |||||||||||||
| Chamois‡ | 260 | 0/45 | 0/89 | 0/21 | 5/81 | 6.2 (0.9–11.4)§ | 3/24 | 12.5 (0–25.7)§ | – | ||||
| Roe deer¶ | 20 | – | 0/6 | 0/9 | – | – | 4/5 | 80.0 (44.9–100) | – | ||||
| Mouflon# | 75 | – | 0/29 | 0/21 | – | – | 0/25 | – | – | ||||
| Fetuses | |||||||||||||
| Chamois | 7 | – | – | – | – | – | 0/7 | – | – | ||||
| Mouflon | 1 | – | – | – | – | – | 0/1 | – | – | ||||
| Roe deer | 1 | – | – | – | – | – | 0/1 | – | – | ||||
| Domestic** | |||||||||||||
| Cattle | 130 | – | 0/9 | – | 26/30 | 86.7 (74.5–98.8) | 79/91 | 86.8 (79.9–93.8) | – | ||||
| Sheep | 60 | – | 0/30 | – | 14/30 | 46.7 (28.8–65.5) | – | – | – | ||||
| Goat |
13 |
– |
0/4 |
– |
2/9 |
22.2 (0–49.4) |
– |
– |
– |
||||
| SBV cases | |||||||||||||
| Stillborn calves | 4 | – | – | – | 0/1 | – | 2/3 | – | 1/4†† | ||||
| Mothers of calves | 4 | – | – | – | – | – | 4/4 | – | – | ||||
*SBV, Schmallenberg virus; ratio, no. positive/no. tested; prev, prevalence; RT-qPCR, real-time qualitative reverse transcription PCR; –, no data or not applicable.
†First evidence of SBV circulation in the study area was a seropositive chamois on September 3, 2012.
‡Two sampling periods, March–May and August–December. Only March–May in 2013.
§Differences not statistically significant.
¶Sampling period April–May.
#Sampling period April–June.
**Two sampling periods, October–November 2011 and November 2012–April 2013.
††Brain, thymus, and abomasum fluid samples positive; liver and kidney samples negative.
Page created: May 19, 2014
Page updated: May 19, 2014
Page reviewed: May 19, 2014
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