Evidence for eosinophil recruitment, leukotriene B4 production and mast cell hyperplasia followingToxocara canis infection in rats. D. Carlos, E.R. Machado, L. De Paula, A. Sá-Nunes, C.A. Sorgi, M.C. Jamur, C. Oliver, W.T. Lima and L.H. Faccioli . Braz J Med Biol Res 2011; 44: 319-326.

Figure 4. Light microscopy analysis of mast cell hyperplasia in the intestine or lung 1 (B, H), 3 (C, I), 6 (D, J), 18 (E, K), and 24 (F, L) days after infection, respectively. The analysis was conducted on Alcian blue- or Toluidine blue-stained tissue sections from the ileum and lung of Toxocara canis-infected rats or uninfected rats (A and G). Mast cells were readily detected in the intestinal mucosa and pulmonary parenchyma after 1 day and progressively increased until day 24. Mast cells are indicated by arrows.