The Measurement of Bacterial Motility Shoesmith, J. G.,, 22, 528-535 (1960), doi = https://doi.org/10.1099/00221287-22-2-528, publicationName = Microbiology Society, issn = 1350-0872, abstract= SUMMARY: Bacterial motility was measured by a simple method which consists of counting the number of organisms which pass across a small aperture in a given time. The count is proportional to the bacterial concentration in the suspension and also to the average speed of the bacteria. A slight increase in the viscosity of the suspending medium above that of a buffer solution has the effect of increasing motility; further increase in viscosity decreases it., language=, type=