Clinical Definition Impetigo is a common, superficial dermatologic infection that is highly contagious, typically caused by Streptococcus (strep) orStaphylococcus (staph) bacteria. Typically, impetigo affects young children, ages 2-6. Blister-like sores form, sometimes filling with pus or yellow fluid, and can result in scabs. In Our Own Words Impetigo is the most common skin infection in children seeing primary care…