Erysipelas is usually caused by by β- hemolytic Streptococcus infection—particularly Streptococcus pyogenes, also known as group A streptococci.  
Additional Streptococcus causes include the following:
Group G Streptococcus  Group B Streptococcus infection  Group C Streptococcus infection
What is the cause of Erysipelas?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What is the cause of Erysipelas? [/INST] \n Erysipelas is usually caused by by β- hemolytic Streptococcus infection—particularly Streptococcus pyogenes, also known as group A streptococci.  
Additional Streptococcus causes include the following:
Group G Streptococcus  Group B Streptococcus infection  Group C Streptococcus infection</s>