Table II.

Lesions identified in animals using ultrasound at the 4 time points in 2006^a

Animal	Enrollment subgroup	LAE	2 wk	4 wk	6 wk
G8267	Arrival fever case	Yes	Yes	Yes	Yes
G7992	Arrival fever case	Yes	No	No	No
G8172	Arrival fever case	Yes	No	No	No
G7955	Arrival fever case	No	Yes	No	No
B3655	Post-arrival fever case	Yes	Yes	Yes	Yes
B3874	Post-arrival fever case	Yes	Yes	Yes	No
B3759	Post-arrival fever case	Yes	No	Yes	No
B3502	Post-arrival fever case	Yes	No	No	No
B3979	Post-arrival fever case	Yes	No	No	Yes
B4023	Post-arrival fever case	Yes	No	No	Yes
B3853	Post-arrival fever case	Yes	No	No	No
B4166	Post-arrival fever case	Yes	No	No	No
G7933	Post-arrival fever case	No	No	No	Yes
B3698	Post-arrival no fever case	Yes	Yes	Yes	Yes
B3847	Post-arrival no fever case	Yes	No	No	No
G7585	Post-arrival no fever case	Yes	No	No	No
B3739	Post-arrival no fever case	No	Yes	No	No
G8029	Post-arrival no fever case	No	Yes	No	No
G8062	Post-arrival no fever case	No	No	Yes	Yes
B3555	Post-arrival control	No	Yes	No	No
B3557	Post-arrival control	No	Yes	No	No
B4277	Post-arrival control	Yes	Yes	Yes	Yes

^aIncludes animals identified with a lesion and examined using ultrasonography at each of the 4 time points in the study in 2006; 52 animals enrolled in that same year were examined at all 4 time points but were not identified with a lesion at any time.

LAE — lesion at enrollment.