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Infantile seborrhoeic dermatitis and Pityrosporum ovale
1Department of Dermatology, University of Gothenburg, Sahlgren's Hospital, Sweden.
Insights
Infantile seborrhoeic dermatitis (ISD) in infants is frequently associated with Pityrosporum ovale and Staphylococcus aureus. Further research is needed to confirm P. ovale
Area of Science:
- Dermatology
- Microbiology
- Pediatrics
Background:
- Infantile seborrhoeic dermatitis (ISD) is a common skin condition in newborns.
- The exact etiological factors of ISD remain unclear.
- Previous studies suggest a potential role for microorganisms in ISD development.
Purpose of the Study:
- To investigate the microbial flora, specifically fungi and bacteria, in infants with ISD.
- To compare the prevalence of specific microorganisms in infants with ISD versus healthy controls.
- To explore the potential etiological role of Pityrosporum ovale and Staphylococcus aureus in ISD.
Main Methods:
- Culture-based investigation of skin swabs from 20 infants with ISD and 20 healthy controls.
- Identification of bacteria, Pityrosporum ovale, and other fungi.
- Statistical comparison of organism prevalence between the case and control groups.
Main Results:
- Pityrosporum ovale was identified in 18 of 20 infants with ISD, compared to 4 of 20 controls.
- Staphylococcus aureus was cultured in 14 of 20 infants with ISD, versus 1 of 20 controls.
- Both P. ovale and S. aureus were significantly more prevalent in infants with ISD.
Conclusions:
- Pityrosporum ovale and Staphylococcus aureus are commonly found in infants with ISD.
- P. ovale is strongly suspected as an etiological agent, though further studies are required.
- S. aureus may act as a secondary invader, similar to its suspected role in atopic dermatitis.
Abstract:
Twenty children (mean age 9 weeks) with infantile seborrhoeic dermatitis (ISD) were investigated with cultures for bacteria, Pityrosporum ovale and other fungi, and 20 healthy children served as controls. P. ovale and Staphylococcus aureus were the dominant organisms. P. ovale was cultured in 18 of 20 infants with ISD as compared to 4 of 20 controls. S. aureus was cultured in 14 of 20 infants with ISD as compared to 1 of 20 controls. The role of S. aureus in ISD is not known, but it could be a secondary invader as is supposed in atopic dermatitis (AD). Even if P. ovale may be suspected as the aetiological agent of ISD further studies are needed to clarify the exact role of the organism in ISD.