Impetigo – Definition, Age Grops Affected, Types, Risk Factors


Last Updated : 1/2/2014
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Ira Shah

Definition of Impetigo

It is a bacterial skin infection which is highly contagious. (1) It appears as honey crusted sores. (2)

Age groups affected

: It almost exclusively affects pre-school children from 2-5 years. (2) It spreads by direct contact with someone who has the infection. Bullous type occurs mostly in neonates. (1)

Types of Impetigo

- Bullous Impetigo
- Non- bullous(Impetigo Contagiosa) - Predominant type.

Risk Factors for Impetigo
: Contaminated water, crowded living conditions, humidity and heat, lack of proper education, lack of personal hygiene and warmer months of summer and autumn. (3)

Causative Organism
: Staphylococcus aureus and Group A Beta hemolytic Streptococcus are both responsible for the non bullous type. The bullous type is caused by a staphylococcal toxin which causes breakdown of the epidermis layer of the skin. (1)


Contributor Information and Disclosures Ira Shah
MBBS, KEM Hospital, Mumbai, India

First Created : 1/23/2013
Last Updated : 1/2/2014
Contributor Information and Disclosures

Last Updated : 1/2/2014
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