Table 1.

Outcome of bioassays of blood from 22 seropositive pigs sampled at Belgrade abattoirs

Number	MAT titre (pig sera)	Mice with cysts/mice examined (n)	Seropositive mice/mice examined (n) (MAT titre)	Real-time PCR (mouse brain)
Market-weight
1	1:1600	0/1a	0/1a	ND
2	1:200	1/4	0/4	+
3	1:400	2/3a	0/3a	+
4	1:400	3/4	0/4	+
5	1:12800	0/4	1/4 (1:100)	-
6	1:800	1/4	0/4	-
7	1:1600	0/3a	0/3a	+
8	1:3200	0/4	1/4 (1:50)	-
9	1:400	0/4	1/4 (1:25)	+
10	1:800	1/4	1b/4 (1:25)	+
11	1:50	1/4	1/4 (1:50)	+
12	1:400	1/4	0/4	+
13	1:50	0/4	0/4	-
14	1:50	0/4	0/4	-
15	1:200	0/4	0/4	-
16	1:400	1/4	0/4	+
17	1:200	0/4	0/4	-
Sows
18	1:400	0/4	0/4	ND
19	1:100	1/4	0/4	+
20	1:1600	2/4	0/4	+
21	1:200	3/4	1b/4 (1:25)	+
22	1:800	1/4	1b/4 (1:25)	-

^a mice (a total of 5) died before time of sacrifice (Erysipelothrix rhusiopathiae isolated from peritoneal exudates of succumbed mice from bioassay no. 1)

^b seropositive mouse had T. gondii tissue cysts; ND, assay not done.