Table 1. Speed asymmetry across different bacterial species.

Species	Swimming Speed Ratio	Motor Speed Ratio	Reference
H. pylori	1.5	-	This work
P. putida	2	-	Theves et al., 2013
V. alginolyticus	1.5	-	Magariyama et al., 2005
Burkholderia spp.	3.9	-	Kinosita et al., 2018
Vibrio fischeri	3.4	-	Kinosita et al., 2018
C. crescentus	1	~2	Lele et al., 2016; Liu et al., 2014
E. coli	~1.3	1.3	Yuan et al., 2010; Lele and Berg, 2015