Table 3.

Final prevalence based on infectious status of 12 cohorts of pigs housed in 12 separate rooms when the pigs reached a BW of 100 kg¹

Room	Seronegative at 100 kg	Virus positive	Seropositive at 100 kg	Infected	Total	Final prevalence
1	2	21	24	45	47	96%
2	4	11	12	23	27	85%
3	1	21	8	29	30	97%
4	1	11	15	26	27	96%
5	2	28	50	78	80	98%
6	6	25	45	70	76	92%
7	2	18	48	66	68	97%
8	25	10	31	41	66	62%
9	20	12	27	39	59	66%
10	10	15	33	48	58	83%
11	0	14	7	21	21	100%
12	9	6	14	20	29	69%

¹By using ModelRisk (version 5.3, Vosesoftware, Gent, Belgium), a probability distribution of Beta4 (0.96,0.56,0.62,1) was fitted to the twelve final animal prevalence figures for the 12 cohorts of pigs.