The VP1/2 Protein of a New Recombinant PRV Strain Promotes the Infectivity and Pathogenicity of PRV in Northeastern China

Figure 6

Pathological analysis of newborn piglets infected with highly pathogenic CH/HLJPRVJ/2023. (a) Newborn piglets were orally infected with PRV (3 dpi) after 48 hr artificial milk replacement, and the mock infection group was treated with PBS instead (n = 4). (b) CH/HLJPRVJ/2023 P20 was used to infect animals, and Vero was infected before experiments for immunofluorescence identification. (c) Colonic staining results were quantified using the mock infection group as a control (n = 3, , and ). (d) The animal model of infection was established by immunofluorescence of the jejunum. (e) Results of scanning electron microscopy of the colon.

(a)

(b)

(c)

(d)

(e)