The commonest organism causing cellulitis is: (A) Streptococcus pyogenes, (B) Streptococcus faecalis, (C) Streptococcus viridans, (D) Microaerophilic streptococci
Answer is A. Streptococcus pyogenes causes a variety of suppurative infection of the skin, including infection of the wound or burns, with a predilection to produce cellulitis and lymphangitis. Streptococcal subcutaneous infection ranges from cellulitis to Necrotising fasciitis. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 215