Observations on Staining the Flagella on Motile Bacteria

1891 ◽  
Vol 13 ◽  
pp. 85
Author(s):  
Veranus A. Moore
Keyword(s):  
Motile Bacteria

scholarly journals Separation and enrichment of sodium-motile bacteria using cost-effective microfluidics

2021 ◽  
Vol 15 (3) ◽  
pp. 034108
Author(s):  
Jyoti P. Gurung ◽  
Moein Navvab Kashani ◽  
Sanaz Agarwal ◽  
Gonzalo Peralta ◽  
Murat Gel ◽  
...  
Keyword(s):  
Cost Effective ◽  
Motile Bacteria

scholarly journals Impact of confined geometries on hopping and trapping of motile bacteria in porous media

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Lazaro J. Perez ◽  
Tapomoy Bhattacharjee ◽  
Sujit S. Datta ◽  
Rishi Parashar ◽  
Nicole L. Sund
Keyword(s):  
Porous Media ◽  
Confined Geometries ◽  
Motile Bacteria

scholarly journals A Wall of Funnels Concentrates Swimming Bacteria

2007 ◽  
Vol 189 (23) ◽  
pp. 8704-8707 ◽  
Author(s):  
Peter Galajda ◽  
Juan Keymer ◽  
Paul Chaikin ◽  
Robert Austin
Keyword(s):  
Escherichia Coli ◽  
Porous Media ◽  
Biological Tissue ◽  
Selection Pressure ◽  
Random Motion ◽  
Swimming Bacteria ◽  
Multistage Pump ◽  
Narrow Opening ◽  
Arbitrary Shapes ◽  
Motile Bacteria

ABSTRACT Randomly moving but self-propelled agents, such as Escherichia coli bacteria, are expected to fill a volume homogeneously. However, we show that when a population of bacteria is exposed to a microfabricated wall of funnel-shaped openings, the random motion of bacteria through the openings is rectified by tracking (trapping) of the swimming bacteria along the funnel wall. This leads to a buildup of the concentration of swimming cells on the narrow opening side of the funnel wall but no concentration of nonswimming cells. Similarly, we show that a series of such funnel walls functions as a multistage pump and can increase the concentration of motile bacteria exponentially with the number of walls. The funnel wall can be arranged along arbitrary shapes and cause the bacteria to form well-defined patterns. The funnel effect may also have implications on the transport and distribution of motile microorganisms in irregular confined environments, such as porous media, wet soil, or biological tissue, or act as a selection pressure in evolution experiments.

scholarly journals THE REMOVAL OF AGGLUTININ FROM SENSITIZED MOTILE BACTERIA

1928 ◽  
Vol 48 (6) ◽  
pp. 825-836
Author(s):  
John B. Nelson
Keyword(s):  
Cent Solution ◽  
No Removal ◽  
Motile Bacteria

It was shown that flocculating (flagellar) agglutinin and granulating (somatic) agglutinin display certain differences with respect to their removal from sensitized bacteria (B. paratyphi). A 5 per cent solution of NaCl added to sedimented, sensitized bacteria followed by heating to 60°C. for 1 hour removed approximately 50 per cent of the combined agglutinin. There was little or no removal of granulating agglutinin either from the sensitized motile bacteria or from a sensitized non-motile organism (Staphylococcus). Evidence was presented that the agglutinin removal was not dependent solely on disintegration of flagella by the conditions of extraction with a subsequent freeing of antibody.

scholarly journals Shared Antigenic Determinants Between Spermatozoa and Bacteria: An Experimental Study

2019 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Escherichia Coli ◽  
Experimental Study ◽  
Streptococcus Pyogenes ◽  
Secretory Protein ◽  
Antigenic Determinants ◽  
Morphological Alterations ◽  
Bacterial Immobilization ◽  
Sperm Immobilization ◽  
Motile Bacteria

Sperm immobilization factor (SIF), the secretory protein of Staphylococcus aureus, is known to cause complete immobilization, death and morphological alterations in mouse spermatozoa in vitro. However, the present study aims to explore a newer dimension of SIF i.e., to bind to motile and non-motile bacteria and its ability to induce immobilization of motile bacteria in vitro. The results showed that 800µg of SIF caused complete immobilization of motile bacteria, however, death and morphological alterations could not be observed even with 1000µg of SIF. Furthermore, this SIF-mediated bacterial immobilization was reversed when each of the SIF-binding receptor from mouse spermatozoa and bacteria (Escherichia coli and Streptococcus pyogenes) was incubated with bacteria, thereby, providing an experimental evidence of similarity between the antigenic determinants present on spermatozoa and bacteria against a common ligand, SIF.

Separation of motile bacteria using drift velocity in a microchannel

Lab on a Chip ◽  
2014 ◽  
Vol 14 (5) ◽  
pp. 1023-1032 ◽  
Author(s):  
Takuji Ishikawa ◽  
Tatsuya Shioiri ◽  
Keiko Numayama-Tsuruta ◽  
Hironori Ueno ◽  
Yohsuke Imai ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Drift Velocity ◽  
Water Quality Management ◽  
Pharmaceutical Industries ◽  
Motile Bacteria

Separation of certain bacteria from liquids is important in the food, water quality management, bioengineering, and pharmaceutical industries.

Effect of mechanical curing treatments on particle distribution to simulate non-motile bacteria migration in cured raw ham

2017 ◽  
Vol 194 ◽  
pp. 58-66 ◽  
Author(s):  
Ramona Bosse ◽  
Nadine Thiermann ◽  
Monika Gibis ◽  
Herbert Schmidt ◽  
Jochen Weiss
Keyword(s):  
Particle Distribution ◽  
Motile Bacteria

scholarly journals Enhanced propagation of motile bacteria on surfaces due to forward scattering

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Stanislaw Makarchuk ◽  
Vasco C. Braz ◽  
Nuno A. M. Araújo ◽  
Lena Ciric ◽  
Giorgio Volpe
Keyword(s):  
Biofilm Formation ◽  
Flat Surface ◽  
Experimental Studies ◽  
Forward Scattering ◽  
Bacterial Motility ◽  
Complex Environments ◽  
Natural Habitats ◽  
Near Surface ◽  
Propulsion Mechanism ◽  
Motile Bacteria

Abstract How motile bacteria move near a surface is a problem of fundamental biophysical interest and is key to the emergence of several phenomena of biological, ecological and medical relevance, including biofilm formation. Solid boundaries can strongly influence a cell’s propulsion mechanism, thus leading many flagellated bacteria to describe long circular trajectories stably entrapped by the surface. Experimental studies on near-surface bacterial motility have, however, neglected the fact that real environments have typical microstructures varying on the scale of the cells’ motion. Here, we show that micro-obstacles influence the propagation of peritrichously flagellated bacteria on a flat surface in a non-monotonic way. Instead of hindering it, an optimal, relatively low obstacle density can significantly enhance cells’ propagation on surfaces due to individual forward-scattering events. This finding provides insight on the emerging dynamics of chiral active matter in complex environments and inspires possible routes to control microbial ecology in natural habitats.

scholarly journals A phage, o , which attacks motile bacteria

1961 ◽  
Vol 25 (2) ◽  
pp. 253-290 ◽  
Author(s):  
E. W. MEYNELL
Keyword(s):  
Motile Bacteria
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