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. 2022 Sep 5;10:145. doi: 10.1186/s40168-022-01323-x

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 4 — Each donor has a mixed population of corncobs. For each of 14 donors, the imaged corncobs were divided into 5 μm segments and the presence of S. mitis/oralis/infantis, S. cristatus, other Streptococcus spp., and Porphyromonas spp. in each segment was recorded. The relative abundance of each type of corncob in each donor is shown (A). Black bars indicate the total number of 5 μm corncob segments counted in each donor (B). Corncob segments consisting of S. cristatus alone constituted 42.3% of the total and a mean of 42.7% (range 6% to 87%) across the 14 individuals. Segments consisting of pure S. mitis/oralis/infantis were 19.4% of the total, mean 23.8% (range 0 to 55%) and pure Porphyromonas sp. segments were 6.8% of the total, mean 6.1% (range 0–20%). Mixed segments and segments including unidentified Streptococcus spp. were 31.6% of the total and mean 27.4% (range 0–50%)