Table 2. Regional distribution of serotypes in Streptococcus suis isolates from pigs in Korea.

Serotype	No. of isolates (%)
	Northern	Central	Southern
1	0	1 (0.8)	0
2a)	14 (16.0)	13 (10.3)	9 (35.0)
1/2a)	3 (3.4)	13 (10.3)	0
3a)	6 (6.8)	27 (21.4)	5 (19.0)
4a)	3 (3.4)	7 (5.6)	1 (3.8)
5	1 (1.1)	2 (1.6)	0
6	2 (2.3)	1 (0.8)	0
7	5 (5.7)	3 (2.4)	1 (3.8)
8	4 (4.5)	3 (2.4)	0
9	7 (8.0)	6 (4.8)	1 (3.8)
14a)	0	1 (0.8)	2 (7.7)
16	3 (3.4)	3 (2.4)	0
17	0	1 (0.8)	0
18	1 (1.1)	0	0
19	0	2 (1.6)	0
20	1 (1.1)	2 (1.6)	0
21	1 (1.1)	5 (4.0)	0
22	2 (2.3)	1 (0.8)	0
23	4 (4.5)	2 (1.6)	0
24	0	1 (0.8)	0
25	1 (1.1)	0	0
28	1 (1.1)	0	1 (3.8)
29	1 (1.1)	6 (4.8)	0
33	1 (1.1)	1 (0.8)	0
aab)	16 (18.2)	13 (10.3)	4 (15.4)
ntc)	11 (12.5)	12 (9.5)	2 (7.7)
Total	88	126	26

a) Significantly different, P<0.05, b) aa, Auto-agglutinated, c) nt, Non-typable.