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TTD values correlated with CFU counts for MGIT ParaTB tubes inoculated with different volumes but the same CFU (100 μl of 105 CFU versus 1,000 μl of 104 CFU). Data for three M. paratuberculosis strains (ATCC 19698, JTC303, and JTC114) are shown. The dotted lines with the same color for each standard curve and green dotted lines show 95% PIs and 95% CIs, respectively.
