Figure 3.

Photomicrography of AOP-1 antigen detection by immunohistochemistry in the frontal cortex of BoHV-5-infected calves (A-D). A) area of intense immunoreactions in the parenchyma; B) intense positive signals surrounding neuron as well as the area of neuron; C) inflammatory cuffs showing intense positive reaction close to mononuclear cells; D) positive labeling associated with gliosis and satellitosis. The strepavidin-biotin peroxidase complex method was used. (scale bar 50 μm)