A toxin produced by types of Streptococcus pyogenes (group A haemolytic streptococci), the bacterial cause of erysipelas. ... (05 Mar 2000) ... 
Type: Term Pronunciation: er-i-sip′ĕ-lō-tok′sin Definitions: 1. A toxin produced by types of Streptococcus pyogenes (group A hemolytic streptococci), the bacterial cause of erysipelas.