Mild atopic dermatitis is characterized by increase in non-staphylococcus pathobionts and loss of specific species

Area of Science:

• Microbiology
• Dermatology
• Genomics

Background:

• Atopic dermatitis (AD) significantly impacts quality of life.
• The skin microbiome's role in mild AD remains understudied.
• Staphylococcus aureus is implicated in severe AD, but its role in mild AD is unclear.

Purpose of the Study:

• To investigate the skin microbiome composition in mild AD lesions.
• To identify bacterial taxa that differ in abundance between mild AD and healthy skin.
• To explore potential targets for early AD intervention.

Main Methods:

• Metagenomic shallow shotgun sequencing was employed.
• Skin microbiome samples were collected from mild AD lesions and healthy controls.
• Bacterial taxa abundance was compared between groups.

Main Results:

• No significant difference in overall skin microbiome diversity was observed between mild AD and healthy skin.
• Relative abundance of Staphylococcus aureus did not differ in mild AD lesions.
• Increased abundance of Mycobacterium ostraviense, Pedobacter panaciterrae_A, and four Streptomyces species in mild AD.
• Decreased abundance of 15 genera, including Paracoccus marcusii, Microbacterium lacticum, Micrococcus luteus, and Moraxella sp002478835.

Conclusions:

• Mild AD skin microbiome shows distinct compositional changes beyond S. aureus.
• These findings provide a basis for developing microbiome-based diagnostics for early AD detection.
• Further research into the functional roles of altered taxa can guide novel therapeutic strategies for mild AD.