TABLE 2.

Mean clinical scores, lung lesion scores, and number of animals in each group positive for M. haemolytica postchallenge

Parameter	Value for group
	1 (day −10)	2 (day −5)	3 (day −1)	4 (control)
No. of animals per group	10	10	9	8
Mean clinical scorea	1.58	1.42	1.41	2.81
Mean lesion score (% lung lesions)b	12.88d	6.41	6.75	23.12
Range of lesion scores	1.94-41.10	0.32-17.70	1.55-12.66	0.05-74.37
No. of animals with positive lung tissuec	6	3	1	8

^aP = 0.03.

^bP = 0.76.

^cP = 0.0008.

^dData not available for one animal.