Virulence factors of Group-A Streptococcus
Streptococcus are gram positive, catalase negative cocci. Are spherical or ovoid, 0.5-1µ in diameter, arranged in chains, non-motile and non-sporing. They may become gram negative...
Fimbriae
These are thin short filamentous appendages which measure about 1-1.5 micron in length and less than 4 to 8 nm in width. They extrude from...