Comparative Safety, Immunogenicity, and Efficacy of CEF Cell-Based and DF-1 Cell Line Adapted Infectious Bursal Disease Vaccines in Specific-Pathogen-Free Chickens

Figure 1

Growth of IBDV LC–75 on DF-cell lines and subsequent CPEs such as cytoplasmic granulation, cell rounding, aggregation, detachment, and floating at different passages. (a) Uninoculated DF-1 cells, (b) CPEs, passage one–day 7, (c) CPEs, passage two–day 6, and (d) CPEs, passage three–day 5.

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