what is impetigo caused from
Impetigo. Impetigo is a common skin infection, usually caused by the Staphylococcus aureus, or âstaphâ bacteria. Some cases are caused by Group A streptococcus bacteria, a type of bacteria that can also lead to strep throat and scarlet fever.n cases of impetigo caused by staph bacteria, symptoms include reddish skin surrounding red blisters that are full of clear liquid or pus that eventually will look cloudy. These blisters can easily burst and leak. Once broken, there is a raw, shiny area that will scab over with a light yellow/brown crust.