Table 1.
The distribution and information of strains and ctxB, tcpA genotypes in this study
| Year | No. of isolates | County (no. of isolates) | Virulence genes genotype (G) | |
|---|---|---|---|---|
| ctxB | tcpA | |||
| 1993 | 2 | FS (1), SZ (1) | G3 | ET |
| 1994 | 8 | GZ (5), ZJ (1), HZ (1), FS (1) | G3, G1 [GZ (4)] | ET |
| 1995 | 6 | GZ (5), FS (1) | G3 | ET |
| 1996 | 7 | GZ (6), ZH (1) | G3 | ET |
| 1997 | 20 | GZ (20) | G3, G1 [GZ (1)] | ET |
| 1998 | 13 | GZ (6), FS (4), SZ (2), HZ (1) | G3 | ET |
| 1999 | 30 | GZ (11), FS (9), SZ (4), ZS(3), JM(2), DG(1) | G3, G1 [DG (1), GZ (1)], G5 [GZ (3)] | ET |
| 2000 | 3 | GZ (1), SZ (1), JM (1) | G3 | ET |
| 2001 | 11 | FS (6), GZ (2), ZJ (2), SZ (1) | G3 | ET |
| 2002 | 2 | GZ (2) | G3 | ET |
| 2003 | 11 | GZ (11) | G3 | ET |
| 2004 | 3 | GZ (1), ZJ (1), ZS (1) | G3 | ET |
| 2005 | 5 | GZ (1), ZJ (1), FS (1), YJ (1), MM (1) | G3 | ET |
| 2006 | 3 | MM (2), ZS (1) | G3 | ET |
| 2007 | 3 | GZ (1), ZJ (1), SZ (1) | G3 | ET |
| 2008 | 3 | DG (2), SZ (1) | G3 | ET |
| 2010 | 1 | GZ (1) | G3 | ET |
| 2012 | 3 | GZ (1), MM (1), FS (1) | G3 | ET |
| 2013 | 2 | ZJ (1), MM (1) | G3 | ET |
| Total | 136 | |||
DG, Dongguang county; ET, El Tor biotype; FS, Foshan county; GZ, Guangzhou county; HZ, Huzhou county; JM, Jiangmen county; MM, Maoming county; SZ, Shenzhen county; YJ, Yangjiang county; ZH, Zhuhai county; ZJ, Zhanjiang county; ZS, Zhongshan county.