Figure 2From: Route of infectious bronchitis virus vaccination determines the type and magnitude of immune responses in table egg laying hensMeasurement of IBV-specific A IgA and B IgY titres using indirect monoclonal ELISA from lachrymal fluid. Data are expressed as mean of corrected optical density (COD)  ±  SEM. Different letters indicate significant differences (p  < 0.05) within time points, determined using one-way ANOVA.Back to article page