Chronic Burrowing ulcer is caused by
Microaerophilic streptococci (Burrowing ulcer / Maleny's ulcer is caused by synergistic infection of microaerophilic non hemolytic streptococci and aerobic hemolytic streptococci)
Microaerophilic streptococci
Peptostreptococcus
Streptococcus viridans
Streptococcus pyogenes
General surgery