Spatial variations in the microbial community structure and diversity of the human foot is associated with the production of odorous volatiles

Stevens, Deborah, Cornmell, Robert, Taylor, David, Grimshaw, Sally, Riazanskaia, Svetlana, Arnold, David, Fernstad, Sara Johansson, Smith, Adrian, Heaney, Liam, Reynolds, James, Thomas, C. L. Paul and Harker, Mark (2015) Spatial variations in the microbial community structure and diversity of the human foot is associated with the production of odorous volatiles. FEMS Microbiology Ecology, 91 (1). pp. 1-11. ISSN 0168-6496

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Official URL: http://dx.doi.org/10.1093/femsec/fiu018

Abstract

The human foot provides an ideal environment for the colonization and growth of bacteria and subsequently is a body site associated with the liberation of odour. This study aimed to enumerate and spatially map bacterial populations' resident across the foot to understand any association with odour production. Culture-based analysis confirmed that Staphylococci were present in higher numbers than aerobic corynebacteria and Gram-positive aerobic cocci, with all species being present at much higher levels on the plantar sites compared to dorsal sites. Microbiomic analysis supported these findings demonstrating that Staphylococcus spp. were dominant across different foot sites and comprised almost the entire bacterial population on the plantar surface. The levels of volatile fatty acids, including the key foot odour compound isovaleric acid, that contribute to foot odour were significantly increased at the plantar skin site compared to the dorsal surface. The fact that isovaleric acid was not detected on the dorsal surface but was present on the plantar surface is probably attributable to the high numbers of Staphylococcus spp. residing at this site. Variations in the spatial distribution of these microbes appear to be responsible for the localized production of odour across the foot.

Item Type: Article
Additional Information: Published online first.
Uncontrolled Keywords: isovaleric acid, microbiomics, odour, GC/MS
Subjects: C500 Microbiology
Department: Faculties > Health and Life Sciences > School of Life Sciences > Applied Sciences
Depositing User: Sara Johansson Fernstad
Date Deposited: 19 Mar 2015 17:14
Last Modified: 17 Mar 2016 11:22
URI: http://nrl.northumbria.ac.uk/id/eprint/21647

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