FIG 4.
Pathological findings in infected mice. Sections of lungs of mice infected with 106.4 PFU of rGDK6 (A to C), rGDK6-MA (HA) (D to F), rGDK6-MA (PA) (G to I), rGDK6-MA (HA, PA) (J to L), or rGDK6-MA (M to O) at 3 days p.i. are shown. Lung sections are hematoxylin and eosin (H&E) stained or immunostained. H&E-stained sections are at a magnification of ×100 (A, D, G, J, and M), with the boxed areas at a magnification of ×400 (B, E, H, K, and N). Immunostained sections are shown at a magnification of ×400 (C, F, I, L, and O) with viral antigen-positive cells marked by brown pigment.