Development and Evaluation of the Biological Adjuvant Bivalent Vaccine for Preventing Newcastle Disease and Infectious Bursal Disease

Figure 4

Transmission electron microscopy of recombinant viruses. Lane 1: rClone30-VP2L-chGM-CSF virus; lane 2: rClone30-VP2L virus; lane 3: rClone30 virus, bar = 200 nm.