Transiënte BVDV infecties, te vrezen of niet?
This presentation attempts to inform the practitioner on health and economic effects of transient bovine viral diarrhea (BVDV) infections in cattle. In a first part an overview of recent outbreaks of transient BVDV infections in Belgium are presented, with details on anamnesis, diagnostic approach and outcome. In a second part, scientific evidence on the effects of transient infections on health and economic parameters is added to the gut feeling from the first part. Focus is on the role of transient BVDV infections in bovine respiratory disease. Some recent publications with direct interest for the practitioner (diagnosis by PCR and use of dexamethasone) are highlighted and a meta-analysis on the effect of BVDV vaccination (live and inactivated vaccines) on morbidity and mortality is presented. In the last part, a take home message about the possible consequences of transient BVDV is formulated with the focus on how practitioners can adjust desired protection of the herd to the infection risk of the herd and the risk attitude of the farmer