Colonising bacteria are particularly virulent. Treatment is with topical antibiotics. Group A Streptococci and Staph Aureus. There is blockage of the lymph drainage sore, bright red, well demarcated sharp border. Associated with fever, malaise and sepsis syndrome.
Treatment is with benzylpenicillin.
Strep Pyogenes is the most common pathogen. Treatment is with flucloxicillin, vancomycin or clindamycin. Gentamycin or amikacin is added if gram negative infection is suspected. Hx of minor trauma, surgery, zoster infection. Again compromised patients are more vunerable.