Cache Valley virus causes infertility, abortions and congenital abnormalities in sheep. Sheep producers during lambing season should be aware of the potential for Cache Valley virus, or CVV, to potentially affect their lambing crop. This year there has been an increase in the number of cases diagnosed and reported by sheep producers in Ohio.
The virus is spread by mosquitoes during early breeding season, generally August through September. The virus is not spread from ewe to ewe, only through mosquitos. Abnormalities in lambs may include crooked joints, deformities of the skeleton, twisted necks or spines, weak muscles or an uncoordinated gait. Most lambs born with severe defects are usually stillborn, yet CVV can cause the birth of lambs that act drowsy, weak, or unsteady and typically all lambs within a set of twins or triplets are affected.
If the infection occurs at less than 28 days gestation, the embryos usually die and are reabsorbed.… Continue readingRead More »