Streptococcus pyogenes - a manipulator of human defences
Streptococcus pyogenes is a major human pathogen with more than 500 000 casualties annually of which at least 163 000 are due to invasive infections. The remainder is due to post-streptococcal complications with rheu¬matic heart disease constituting the majority. S. pyogenes also causes milder infections such as skin infections and pharyngitis with an estimation of more than 700 million cases each