Fig. 4.
Effect of prolonged ovalbumin (OVA) challenge on cytokine levels. IL-4 (a, b), IL-5 (c, d), IL-13 (e, f) and IFN-γ (g, h) levels were measured in bronchoalveolar lavage (left panel) and lung tissue homogenates (right panel) by ELISA in samples from alum controls, acute and chronic phase killed 24 h after the final OVA challenge and mice from day 80. Data are expressed as mean ± SEM; n = 4–17/group and *P<0.05 in comparison with alum control mice. ND, non-detectable.