Figure 3. Immunohistochemical findings for nasal turbinates, showing peroxidase staining of viral antigen in the epithelial surface (magnification ×400; arrows). A) Turkey poults exposed to human metapneumovirus (hMPV B2). B) Turkey poults exposed to avian metapneumovirus (aMPV C). C) Sham-inoculated turkey poults.
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