Figure 2.

Spleen weights in weaned piglets fed alternative form of zinc oxide. Weaned piglets were administered different form of zinc oxide for two weeks. The control piglets were fed diets with no zinc oxide. The figure displays gross pictures and average weights of the spleen from four dietary pig groups (control, CON; ZnO, positive control; chelate-ZnO, zinc chelate with glycerin; and nano-ZnO, nanoparticle-sized zinc oxide). Data are represented as mean ± SD. Values were statistically analyzed by one-way ANOVA with Tukey’s multiple comparison test.