Impetigo

Definition

Impetigo is a highly contagious bacterial skin infection characterized by red sores and blisters, primarily caused by Staphylococcus aureus and Streptococcus pyogenes. It commonly affects infants and young children but can occur in individuals of any age.

5 Must Know Facts For Your Next Test

1. Impetigo is primarily caused by Gram-positive bacteria such as Staphylococcus aureus and Streptococcus pyogenes.
2. The infection is usually spread through direct contact with infected lesions or contaminated objects.
3. Symptoms include red sores that quickly rupture, ooze for a few days, and then form a yellowish-brown crust.
4. Impetigo can be classified into two types: nonbullous (more common) and bullous (less common).
5. Topical or oral antibiotics are commonly used to treat impetigo, effectively reducing the duration of the infection.

Review Questions

• What are the primary causative agents of impetigo?
• How is impetigo typically transmitted?
• What are the distinguishing symptoms of nonbullous and bullous impetigo?

Related terms

Staphylococcus aureus:

A Gram-positive bacterium that often causes skin infections including impetigo.

Streptococcus pyogenes:

A Gram-positive bacterium known for causing various infections, including strep throat and impetigo.

Cellulitis:

A bacterial skin infection that involves deeper layers of the skin compared to impetigo.