Cryptosporidium parvum and bovine coronavirus in naturally and experimentally exposed calves: clinical outcome and pathogen shedding.

The calves in G1 and G2 had, respectively, 4 and 5.6 times more sick days than the calves in G3 over the entire duration of the experiment (Table 2 ), but the difference between groups by nonparametric Kruskal–Wallis test ( ε 2 = 0.424, P = 0.051) showed only a tendency toward significance.

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