Fig. 2. ALV-J and REV coinfection competitively promoted viral replication in CEF cells. ALV-J and REV staining was observed in CEF cells at 24 h, 48 h, 72 h, and 96 h post infection by immunofluorescence microscopy.

ALV-J, avian leukosis virus subgroup J; REV, reticuloendotheliosis virus; CEF, chicken embryo fibroblast.