TABLE 2.

Anti-M. bovis IgG titers of calf sera from experiment 1

Group no.	Infection status	No. of calves	Mean ± SD of log10 anti-M. bovis IgG titers at the indicated day after challengea
			10	17	24
1	Uninfected	4	1.39 ± 0.2 A	1.4 ± 0.1 A	1.35 ± 0.14 A
2	Infected	12	1.28 ± 0.2 A	1.39 ± 0.3 A	2.19 ± 0.37 B

^aValues marked with the same letter in the same column are not significantly different (P < 0.05).