<prompt> Streptococcus all are true exceptStreptodornase cleaves DNAStreptolysis O is active in reduced stateStreptokinase is produced from serotype A, C, KPyrogenic toxin A is plasmid mediated  <response>: Three toxin types of streptococcal pyroexotoxin have been identified: A, B and C. Type A and C are bacteriophage coded Type B is chromosomally mediated 