TABLE 3.

Anti-M. bovis IgG titers of calf sera from experiment 2

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	5	1.4 ± 0.38 A	1.28 ± 0.4 A	1.27 ± 0.3 A
2	Infected	30	1.15 ± 0.25 A	1.3 ± 0.4 A	2.3 ± 0.4 B

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