Pestivirus infections in pregnant sheep and cattle. Studies on epidemiology, reproduction, and prospects for control

anticorps monoclonal anticuerpos monoclonales bdv border disease brebis cows diarrea diarrhoea disease transmission enfermedad de las fronteras epidemiologia epidemiologie epidemiology ewes gestation monoclonal antibodies nucleotide sequence oveja pestivirus pregnancy progesterona progesterone prostaglandinas prostaglandine prostaglandins reproduction secuencia nucleica transmission des maladies ultrason ultrasonics ultrasonido vaca vaccin vaccines vache vacuna virose viroses virosis