Growth kinetics of the BoHV-1ΔgEβgal virus. MDBK cells were infected at a MOI of 0.1 with either BoHV-1ΔgEβgal or BoHV-1 LA virus strains. Viral replication was checked every 3 hours during a period of 60 hours pi. Virus titrations were performed in duplicate for each time point on MDBK cells. Titers are expressed as TCID50/ml. Each data point represents the mean of the titers obtained.