Table IV.

Number of animals identified with lesions using ultrasonography at each time point^a,^b

Enrollment group	LAE	2 wk	4 wk	6 wk
Arrival
Arrival fever cases	3/29	3/7	2/30	1/3
Arrival controls	1/14	1/4	3/15	0/2
Post-arrival group
Post-arrival fever cases	14/48	2/22	5/46	4/22
Post-arrival no fever cases	3/38	4/26	5/38	2/24
Post-arrival controls	1/41	3/24	2/41	1/23

^aLesions are not necessarily in the same animals over time.

^bNumber of animals identified with lesions using ultrasound divided by the number of animals tested with ultrasound at the different time points.

LAE — lesion at enrollment.