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Eggs isolated by fecal flotation of samples collected from 8-, 12-, 16-, 20-, and 24-wk-old mice were counted. More eggs were isolated from 8- and 12-wk-old mice compared with older mice (n = 25 cages at each time point; solid horizontal lines indicate median values for each group of data points; Kruskal–Wallis with Dunn multiple comparison posthoc; *, P < 0.05; †, P < 0.01; §, P < 0.0001).
