<prompt> Erysipelas is caused by ?Staph aureusStaph albusStrep pyogenesHemophilus  <response>: Ans. is c i.e., Strep pyogenes Erysipelas - is due to S. pyogenes and - is characterized by an abrupt onset of fiery-red swelling of the face or extremities. the distinctive features of erysipelas are well-defined indurated margins, paicularly along the nasolabial fold; rapid progression; and intense pain. extension to deeper soft tissues is rare. treatment with penicillin is effective 