Fig. 1From: Genetic characterization and mutation analysis of Qihe547 Aujeszky’s disease virus in ChinaThe indentification of Qihe547 ADV. a and c. Negative control, PK-15 cells uninfected with Qihe547 ADV. b. Specific cytopathic effects of Qihe547 ADV (× 100). d. Indirect immunofluorescence assays of Qihe547 ADV in PK-15 cells (× 200)Back to article page