Chemotactic Sensitivity of Escherichia coli to Diffusion Perturbations in Narrow Tubes

Chemotactic Sensitivity of Escherichia coli to Diffusion Perturbations in Narrow Tubes

Diffusion resistance hinders the free chemotactic motility of bacteria through narrow tubes and capillaries. In many such situations, diffusion is significant and often subject to environmental perturbations. This problem has been analyzed through the sensitivities of Escherichia coli cells, a secreted chemoattractant (aspartase) and a nutrient. Differences and similarities among the sensitivit...

Antibiotic Sensitivity Patterns of Escherichia coli Isolated in Urine Samples of Patients Referred to Ayatollah Mousavi Hospital in Zanjan

Background & Objective: Escherichia coli (E. coli) is considered to be the most common cause of urinary tract infections (UTIs) worldwide. Due to the recent rise in bacterial resistance to antibiotics and the appearance of multidrug-resistant E. coli, treatment options have been significantly limited, thus increasing the cost of treatment as well as morbidity and mortality rates, especially in ...

Sensitivity in ranking for perturbations of data in DEA

Chemotactic signaling in filamentous cells of Escherichia coli.

Video techniques were used to record chemotactic responses of filamentous cells of Escherichia coli stimulated iontophoretically with aspartate. Long, nonseptate cells were produced from polyhook strains either by introducing a cell division mutation or by growth in the presence of cephalexin. Markers indicating rotation of flagellar motors were attached with anti-hook antibodies. Aspartate was...

Optimal Noise Filtering in the Chemotactic Response of Escherichia coli

Information-carrying signals in the real world are often obscured by noise. A challenge for any system is to filter the signal from the corrupting noise. This task is particularly acute for the signal transduction network that mediates bacterial chemotaxis, because the signals are subtle, the noise arising from stochastic fluctuations is substantial, and the system is effectively acting as a di...