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. 2020 Jan 10;32(2):259–267. doi: 10.1177/1040638719898689

Figure 2.

Figure 2.

zmpA and zmpB are required for virulence in strain 56 and zmpA in strain WER-NE36. A. The virulence of the wild-type WER-NE36 and its zmpA mutant. B. The virulence of the strain 56 wild-type and its zmpA and zmpB mutants. The symbols represent the lesion severity for individual birds (n = 20–22 birds for each group), and the dotted line represents the mean lesion severity of that group. Error bars represent standard error of the mean. Lesion severity scale is described in Figure 1. Medium control groups were inoculated with sterile broth only. Statistical analysis Kruskal–Wallis with Dunn post-test showed a significant difference (p < 0.001) between the positive control and other groups as denoted by an asterisk (*). Data represent combined results from 2 independent trials.