Expression of selected CCR3 ligands and selected genes associated with eosinophils, mast cells, inflammation, and Th1-, Th2-, or Treg cells in the lung of pigs infected with A. suum and treated with two different doses of ATRA. Tissue mRNA expression (CT values) at 7 or 14 days after inoculation were evaluated by one-way ANOVA. n-fold changes from results for control pigs are designated by color differences, shown in the figure insert, and statistical significance by A (P < 0.05) or B (P < 0.01).