Serological and molecular diagnosis of bovine viral diarrhoea virus and evidence of other viral infections in dairy calves with respiratory disease in Venezuela

bovin laitier bovine diarrhoea pestivirus calves dairy cattle diagnosis diagnostic diarrea diarrhoea enfermedades respiratorias epidemiologia epidemiologie epidemiology ganado de leche maladie respiratoire pestivirus de la diarrea bovina pestivirus maladie des muqueuses respiratory diseases ternero veau venezuela virose viroses virosis