- Research Article
- 10.2460/ajvr.25.01.0014
A 5-month temporal, quantitative study investigating the core microbiome on the axilla, umbilical region, and groin of 15 healthy dogs in the UK.
- Apr 25, 2025
- American journal of veterinary research
- Richard Harvey + 1 more +1
To identify putative members of the canine cutaneous core flora. A knowledge of this flora is important if we are to properly understand cutaneous dysbiosis. Cutaneous dysbiosis has been reported in allergic skin conditions, for example. The unclipped skin on the axilla, umbilical region, and groin of 15 healthy dogs was swabbed monthly for 5 months using flocked cotton swabs. The samples were taken within a sterile brass guide of the known area. The swabs were submitted for next-generation 16S rRNA and internal transcribed spacer 2 sequencing to identify components of the bacterial and fungal microbiome. The density of the bacteria and fungi were expressed as IQR/cm2. Coagulase-negative staphylococci, Sphingomonas subsp, Malassezia var, Vishniacozyma victoriae, and Cladosporium var were recovered from 70% of samples. None of these 5 were found on every dog on every occasion. The density of the bacteria was 6.4 × 104 (IQ [interquartile range] 1, 3.2 × 104; IQ3, 1.2 × 105), the density of the filamentous fungi was 1.04 × 103/cm2 (IQ1, 450; IQ3, 2.13 × 105), and the density of malassezial yeast was 1.3 × 122 (IQ1, 90; IQ3, 1.8 × 10). We propose that these 2 bacterial species and 3 fungal species be considered members of the core cutaneous flora of dogs. Knowledge of the normal flora will help our understanding of aberrations in flora that might be associated with underlying diseases, such as atopy.
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