Volume 17, Number 12—December 2011
Research
Lineage and Virulence of Streptococcus suis Serotype 2 Isolates from North America
Nahuel Fittipaldi, Jiangu Xu, Sonia Lacouture, Prasit Tharavichitkul, Makoto Osaki, Tsutomu Sekizaki, Daisuke Takamatsu, and Marcelo Gottschalk
Table 3
Association of Streptococcus suis serotype 2 STs and srtF and srtG pilus clusters in isolates from North America*
| ST | No. strains | srtF pilus cluster |
srtG pilus cluster |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Gene† |
Pili expression‡, Sfp1 | Gene† |
Pili expression, Sgp1‡ | ||||||||
| srtF | sfp1 | sfp2 | sipF | srtG | sgp1 | sgp2 | |||||
| 1 | 11 | 11 | 11 | 11 | 11 | 11 | 3 | 3 | 3 | 0 | |
| 25 | 36 | 36 | 36 | 36 | 36 | 0 | 36 | 36 | 36 | 36 | |
| 28 | 49 | 49 | 49 | 49 | 49 | 46 | 49 | 49 | 49 | 47 | |
*ST, sequence type.
†The presence of the genes was detected by PCR by using primers and conditions described by Takamatsu et al. (13).
‡Expression of pili encoded by the srtF and srtG pilus clusters was performed by Western blotting by using described antibodies directed against the major subunits of these structures (16,17).
