Impetigo is a bacterial
condition that affects the surface of the skin.
Recall that the skin is also known as the "integument", or "integumentary system".
The two forms of impetigo are:
- Nonbullous impetigo is caused by Staphylococcus
aureus, Streptococcus species, or both organisms.
It mainly affects young children and is highly contagious, with yellowish-brown crusting.
- Bullous impetigo is caused by Staphylococcus aureus.
It is characterized by blisters, is less contagious than the nonbullous form, and occurs at any age.