Volume 13, Number 11—November 2007
Research
Protection and Virus Shedding of Falcons Vaccinated against Highly Pathogenic Avian Influenza A Virus (H5N1)
Figure 2

Figure 2. Immunohistochemical demonstration of influenza A virus antigen (red, see arrows) in numerous splenic macrophages of a falcon after challenge with 106.0 50% egg infectious doses of the highly pathogenic avian influenza strain A/Cygnus cygnus/Germany/R65/06 (H5N1). Avidin-biotin-peroxidase complex method. Bar = 25 μm.