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L01.0 Impetigo Contagiosa – Causes & Treatment
L01.0 is the ICD-10 code for impetigo contagiosa, a common and highly contagious bacterial skin infection that primarily affects children.
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L01.0 is the ICD-10 code for impetigo contagiosa, a common and highly contagious bacterial skin infection that primarily affects children.
What is L01.0 (Impetigo Contagiosa)?
L01.0 is the ICD-10 diagnosis code for impetigo contagiosa, a superficial, highly contagious bacterial infection of the skin. It is one of the most common skin conditions in childhood, although adults can also be affected. The term “contagiosa” reflects the high transmissibility of the disease.
Causes
Impetigo contagiosa is typically caused by the following bacteria:
- Staphylococcus aureus (most common cause, particularly in Western countries)
- Streptococcus pyogenes (Group A Streptococcus), often as a co-causative agent
The bacteria enter the skin through minor abrasions, scratches, insect bites, or pre-existing skin damage. Transmission occurs through direct contact with infected skin or contaminated objects (e.g., towels, toys).
Symptoms
Typical signs of impetigo contagiosa include:
- Small red spots or blisters that burst quickly
- Honey-colored crusts on the skin – the most characteristic feature
- Preferred locations: face (especially around the mouth and nose), hands, and arms
- Mild itching
- Usually no fever or general feeling of illness
Two main forms are distinguished:
- Non-bullous impetigo: The most common form, presenting with honey-colored crusts
- Bullous impetigo: A rarer form with larger fluid-filled blisters, caused by specific toxins produced by S. aureus
Diagnosis
The diagnosis is usually made clinically, meaning the physician identifies the condition based on the typical appearance of the skin. In unclear cases or when treatment fails, a skin swab with subsequent bacterial culture and sensitivity testing may be performed.
Treatment
Topical Therapy
In mild or localized cases, topical antibiotic treatment is recommended:
- Fusidic acid cream or mupirocin ointment applied directly to the affected areas
- Crusts can be gently softened with water before application
Systemic Therapy
For extensive involvement, immunocompromised patients, or complications, oral antibiotic therapy is used, for example with:
- Cephalosporins (e.g., cefalexin)
- Amoxicillin-clavulanate
- In cases of MRSA: specific reserve antibiotics based on sensitivity testing
Hygiene Measures
During treatment, strict hygiene practices are essential to prevent further spread:
- Frequent handwashing
- Use of personal towels and clothing
- Children should stay home from school or daycare until the lesions have healed or for at least 48 hours after starting antibiotic therapy
Complications
Impetigo contagiosa usually resolves without lasting damage. However, rare complications may include:
- Ecthyma: A deeper skin infection with ulcer formation
- Post-streptococcal glomerulonephritis: A kidney inflammation occurring as a late complication of streptococcal infection
- Regional lymph node swelling (lymphadenitis)
References
- Robert Koch Institute (RKI): Staphylococcus aureus and MRSA – RKI Advisory. Berlin, 2023.
- Nast A. et al.: S2k guideline on the treatment of impetigo contagiosa and furunculosis. AWMF, 2021.
- Hay RJ et al.: Skin infections – global burden of disease. British Journal of Dermatology, 2014.
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