Fig. 3: The motion of the leptospirosis spirochetes over kidney cell monolayer. | Nature Communications

Fig. 3: The motion of the leptospirosis spirochetes over kidney cell monolayer.

From: Machine learning-based motion tracking reveals an inverse correlation between adhesivity and surface motility of the leptospirosis spirochete

Fig. 3

Swimming bacteria were measured in liquid phases over kidney cells (Fig. 1). a Swimming and crawling trajectories of representative bacteria are presented in 3-s runs. The analyzed trajectories for swimming and crawling were 182 and 133 in the asymptomatic pair and 20 and 127 in the severely symptomatic pair. b Probability distribution functions (PDFs) of swimming and crawling speeds. The box-and-whisker plots (insets) show the 25th (the bottom line of the box), 50th (middle), and 75th (top) percentiles and the minimum and maximum values (whiskers) of the speed data set obtained in each pair. The measured bacteria were 123 (swimming of asymptomatic), 23 (swimming of severely symptomatic), 125 (crawling of asymptomatic), and 84 (crawling of severely symptomatic). c Time plot of the mean square displacement (MSD). The log–log plots show the ballistic ( ∝ Δt2) and diffusive ( ∝ Δt) regimes; the time dependence changes at ~1 s (see also the main text). The upper right panels show the diffusion coefficients determined by the line fitting to the regime ∝ Δt.

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