TABLE 1

Immunohistochemical detection of influenza A viral antigen in P0 rH5N3- and P6 rH5N3-inoculated birdsa

Tissue1 dpi2 dpi3 dpi
P0 rH5N3P6 rH5N3P0 rH5N3P6 rH5N3P0 rH5N3P6 rH5N3
Brain1+1+3+
Lung1+2+wk+1+
Spleenwk+wk+2+wk+1+
Cecal tonsil2+wk+wk+
Heart1+2+1+3+
Pancreaswk+2+
  • a –, No immunostaining; wk+, weak immunostaining (<20 cells); 1+, mild immunostaining (<25% of the section); 2+, moderate immunostaining (25 to 50% of the section); 3+, abundant immunostaining (51 to 75% of the section). dpi, days postinoculation.