Which of the following are bacterial infection of skin?
Pyoderma gangrenosum
Piedra
Impetigo contagiosa
Impetigo herpetiformis
C i.e. Imetigo contagiosaPiedra is a fungal infection of hair. Pyoderma gangrenosum is a rare, serious ulcerative disorder that is often d/t serious underlying systemic disease eg ulcerative colitis, chron's disease, rheumatoid ahritis or myeloma etc. Impetigo herpetiformis is the synonym of generalized pustular psoriasis of pregnancy.