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Single-step growth curves of ABBV-1 in primary embryonic fibroblasts from chicken (CEF), duck (DEF), and goose (GEF). Cells were infected at a multiplicity of infection (MOI) of 5, and at 1, 2, 4, 6, 10, 14, and 21 days post infection (dpi) a population of cells were fixed and virus was detected using immunofluorescence. Cells were counterstained with DAPI to determine percentage of infected cells over time. Each data point represents mean +/− standard deviation (n = 3).
