The predominant pathogen responsible for impetigo has been changing from group A strep. Earliest lesion is a erythematous macule on exposed areas of skin, discrete thin-walled vesicles which rapidly become pustular and then rupture.
Incidence Frequently occurs in early childhood, although all ages can be affected.
This is similar to Bullous Impetigo. Pathophysiology Minor traumas such as insect bites predispose to the appearance of infected lesions. Production of bacteriocins by group A Strep. In the st. Lesion of Bullous impetigo are usually caused by staph.