Figure 8

The location of IgA⁺ B cells within the nasal epithelium of pigs at different growth stages. A IHC staining for IgA⁺ B cells in the nasal epithelium. B-cell-specific IgA protein was stained brown. CSII represented the anterior part of the respiratory region, CSIII represented the rear part of the respiratory region, and CSIV represented the olfactory region. Scale bars: 100 μm. B Quantification analysis of IgA⁺ B cells. The number of IgA-positive cells in different parts of the nasal cavity was counted in five random fields (×10) from the four cross-sections. All data shown are the mean ± SD from three independent experiments. Statistical significance was obtained using one-way ANOVA. NS no significance, *P < 0.05, **P < 0.01.