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Impetigo

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What is impetigo?

A common skin infection caused by streptococcal or staphylococcal bacteria

What are the signs or symptoms?

Small, red pimples or fluid-filled blisters (pustules) with crusted yellow scabs found most often on the face but may be anywhere on the body

What are the incubation and contagious periods?

  • Incubation period: Variable. Skin colonization is common. Minor skin trauma may result in skin infections like impetigo.

  • Contagious period: Until the skin sores are treated with antibiotics for at least 24 hours or the crusting lesions are no longer present.

How is it spread?

  • Contact with the sores of an infected person or from contaminated surfaces.

  • Germs enter an opening on skin (eg, cut, insect bite, burn) and cause oozing, leading to honey-colored crusted sores.

  • Occurs year-round but most common in warm weather. Also occurs in cold weather when the skin around the nose and face is damaged by runny nasal secretions and nose wiping that irritates the skin.

How do you control it?

  • Cover lesions, after which infected individuals should be treated with an appropriate antibiotic regimen (oral or topical) at the end of the day.

  • Use good hand-hygiene technique at all the times listed in Chapter 2.

  • Clean and sanitize surfaces.

  • Clip fingernails to reduce further injury of tissues by scratching and subsequent spread through contaminated fingernails.

  • In the event of an outbreak (more than one infected child in a group), consult with the local health department. The problem could involve staphylococcal bacteria (see Staphylococcus aureus [Methicillin-Resistant (MRSA) and Methicillin-Sensitive (MSSA)] Quick Reference Sheet).

What are the roles of the teacher/caregiver and the family?

  • Consult the child’s health care provider for a treatment plan.

  • Use good hand-hygiene technique at all the times listed in Chapter 2.

  • Clean infected area.

  • Use medication recommended by the child’s health professional.

  • Loosely cover infected area to allow airflow for healing and avoid contact with others in group care settings.

  • Wear gloves and perform hand hygiene after coming into contact with sores or when changing bandages at the group setting and home.

  • Launder contaminated clothing articles daily.

  • Notify the local health department if an outbreak occurs.

Exclude from group setting?

Wash the affected area, cover the sores, and then, at the end of the day, the child should see a health care provider. If impetigo is confirmed, the child should start treatment (oral or topical antibiotic) before returning. If treatment is started before the next day, no exclusion is necessary. However, the child may be excluded until treatment has started.

Readmit to group setting?

Yes, when all the following criteria have been met:

  • As long as the lesions are covered, the child can return once appropriate treatment has started (oral or topical antibiotics). Lesions should be kept covered until they are dry.

  • When the child is able to participate and staff members determine they can care for the child without compromising their ability to care for the health and safety of the other children in the group.

Comments

  • When impetigo is caused by group A Streptococcus, treatment and complication issues are similar to when this germ causes strep throat (see Strep Throat [Streptococcal Pharyngitis] and Scarlet Fever Quick Reference Sheet). However, acute rheumatic fever does not result from impetigo.

  • Health care providers may use antibiotic ointment when there are only a few impetigo lesions and oral antibiotic(s) when there are many lesions.

Listing of resources does not imply an endorsement by the American Academy of Pediatrics (AAP). The AAP is not responsible for the content of external resources. Information was current at the time of publication.

The information contained in this publication should not be used as a substitute for the medical care and advice of your pediatrician. There may be variations in treatment that your pediatrician may recommend based on individual facts and circumstances.

Quick Reference Sheet from Managing Infectious Diseases in Child Care and Schools: A Quick Reference Guide.

© 2017 American Academy of Pediatrics. All rights reserved.

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