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. 2021 Apr 6;6(2):e01342-20. doi: 10.1128/mSystems.01342-20

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Copyright © 2021 Cross et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license.

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FIG 1 — Characteristics of Proteus mirabilis and Providencia rettgeri isolates. (A) Workflow for sample collection and examples of unique colony morphologies of Providencia (n = 2) and Proteus (n = 7) isolates. Nasonia development from larvae to adulthood is depicted on top demonstrating the L3 larval stage in which samples were collected from parental and hybrid lines. Following isolation, samples were prepared for whole-genome sequencing (WGS). (B) Biofilm formation by representative Proteus and Providencia isolates shows significantly different abilities to form biofilms on solid surfaces. Bars denote significantly different values based on Kruskal-Wallis test with Dunn’s multiple comparison with sample sizes of n = 17 to 30 of two biological replicates (**, P = 0.0018; ****, P = <0.0001). (C) Composition of the biofilm coculture shows Proteus mirabilis significantly outcompetes Providencia rettgeri when grown together. Providencia rettgeri makes up about 6.4% of the coculture biofilm composition. Bars denote significantly different values calculated by a Mann-Whitney U test with sample size of n = 13 to 18 (****, P = <0.0001).