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. 2022 Sep 9;14(9):2002. doi: 10.3390/v14092002

Figure 4.

Figure 4

Immunohistochemistry staining to detect the nucleocapsid protein of SARS-CoV-2 in goat tonsils (scale bar: 200 µm). (a) Negative control animal with no antigen labelling. (b) Positive result in the tonsil of a goat euthanised at 2 dpi; immunolabelling is seen as brownish staining in dendritic-like cells around a tonsillar crypt.