ArticleBMC microbiology2025
Genomic characteristics and phylogenetic relationships of Cutibacterium acnes breast milk isolates.
Article in BMC microbiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Comparative Genomic Analysis of Latilactobacillus curvatus: Insights into Adaptive Evolution and Niche-Specific Traits.Current microbiology · 2026Article
- Dermatological implications of alignment-based de-hosting and bioinformatics pipelines on shotgun microbiome analysis.Journal of translational medicine · 2025Article
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8 authors.
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Abstract
backgroundCutibacterium acnes is one of the most commonly found microbes in breast milk. However, little is known about the genomic characteristics of C. acnes isolated from breast milk. In this study, the sequencing and assembly results of 10 C. acnes isolates from breast milk were compared with the genomic data of 454 strains downloaded from NCBI, and the characteristics of breast milk isolates from various perspectives, including phylogeny, genomic characteristics, virulence genes, drug resistance genes, and carbohydrate utilization, were elucidated.
resultsThe findings of this study revealed no differences between the breast milk isolates and other isolates in terms of genomic features, phylogenetic relationships, virulence, and resistance-related genes. However, breast milk-derived isolates exhibited significantly lower copies of the carbohydrate metabolic enzyme genes GT5 and GT51 (P < 0.05) and a higher copy number of the GH31 gene (P < 0.05) than others. C. acnes primarily consists of three genetic branches (A, B, and C), which correspond to the three subspecies of C. acnes (C. acnes subsp. elongatum, C. acnes subsp. defendens, C. acnes subsp. acnes). The genetic differences between branches B and C were smaller than that between branch A. Branches A and B carry a higher number of copies of carbohydrate enzymes, including CE1, CE10, GH3, and CBM32 than branch C. Branches B and C possess the carbohydrate enzymes PL8 and GH23, which are absent in branch A. Core genes, core intergenic regions, and concatenated sequences of core genes and core intergenic regions were compared to construct a phylogenetic tree, and it was found that core intergenic regions could be used to describe phylogenetic relationships.
conclusionsIt is therefore speculated that the C. acnes in breast milk originates from the nipple or breast surface. This study provides a novel genetic basis for genetic differentiation of C. acnes isolates from breast milk.
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