Construction of a gE-Deleted Pseudorabies Virus and Its Efficacy to the New-Emerging Variant PRV Challenge in the Form of Killed Vaccine

Figure 4

Histopathological results of unvaccinated (a–d) and vaccinated pigs (e–h). (a) Tonsil. Tonsillar lymphoid tissue necrosis and formation of big necrotic foci. (b) Lung. Massive vascular congestion. (c) Mesenteric lymph node. Vascular dilatation and formation of big necrotic foci. (d) Cerebellum. Purkinje cell degeneration and necrosis. (e–h) Tonsil, lung, lymph node, and cerebellum samples from vaccinated pigs. Original magnification ×200.

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