The phrase "a decrease in motility" is correct and usable in written English.
It can be used in contexts related to biology, medicine, or any field discussing movement or activity levels of organisms or cells.
Example: "The study revealed a decrease in motility among the affected cells, indicating a potential health issue."
Alternatives: "a reduction in motility" or "a decline in motility."
In bacteria, high c-di-GMP levels are generally associated with the stimulation of biofilm formation via the production of adhesive surface organelles or EPS synthesis and a decrease in motility.
We also investigated the motility phenotypes, since increased biofilm development is likely to be concomitant with a decrease in motility [31].
A decrease in motility was observed when MUC4 was downregulated, using an antisense technology in CD18/HPAF cells, in comparison with mock-transfected cells.
The changes suggest adaptations related to the digestibility [ 31] and consistency [ 32] of the HFD or an increase in the retention of food in the duodenum and proximal jejunum caused by a decrease in motility in these segments.
After cryopreservation a decrease in sperm motility and all sperm motility parameters were observed.
The only other published study, which to our knowledge examined the effect of S100A6 on motility, showed a decrease in the motility of one of three osteosarcoma cell lines after adenoviral-mediated overexpression of S100A6 (Luu et al, 2005).
A decrease in bacterial motility, caused probably by down-regulation of flagellum synthesis or other factors related to bacterial motility [31], [32], could have reduced the predator encounter rate leading to more defensive but less virulent bacteria [33], [34].
No definitive data are available for men, but Guo et al. (2000) observed alterations in sperm morphology and motility after prenatal exposure to PCBs/PCDFs in the Yucheng cohort, and Hauser et al. (2005) reported a decrease in sperm motility as a consequence of exposure to PCBs and phthalates in adults.
During liquid storage a decrease in sperm motility and an increase in sperm-extracted amidase activity were observed.
The luxS isogenic mutant of A. hydrophila, which we prepared by marker exchange mutagenesis, showed an alteration in the dynamics and architecture of the biofilm formation, a decrease in the motility of the bacterium, and an enhanced virulence in the septicemic mouse model.
Interestingly, lowered pathogenicity was accompanied by a decrease in bacterial motility [40] and resource use efficiency [40], [54].
