Bacterial biofilms demonstrate resistance in response to antimicrobial stress. This adaptive response is more effective than in the corresponding planktonic populations. The topic of this paper is concerned with an investigation of the longtime behavior of solutions to a biofilm model without growth on domains in Rd (d = 1, 2, 3). This analysis is extended to both planktonic and biofilm systems...

This communication focuses on the efficacy of a specific lytic phage, phage Phi S1, as a control agent of Pseudomonas fluorescens biofilms. The effect of phage infection temperature and the host growth temperature were evaluated. The results obtained showed that the phage infection process was temperature dependent and that the optimum temperature of infection of planktonic cells and biofilms w...

The aim of this study was to determine if there were differences between the types of ammonia-oxidizing bacteria of the beta subdivision of the class Proteobacteria associated with particulate material and planktonic samples obtained from the northwestern Mediterranean Sea. A nested PCR procedure performed with ammonia oxidizer-selective primers was used to amplify 16S rRNA genes from extracted...

Autotrophic and heterotrophic metabolism of microbial planktonic communities in an oligotrophic coastal marine ecosystem: seasonal dynamics and episodic events O. Bonilla-Findji, J.-P. Gattuso, M.-D. Pizay, and M. G. Weinbauer INSU-CNRS, Laboratoire d’Océanographie de Villefranche, UMR 7093, B.P. 28, 06234 Villefranche-sur-Mer Cedex, France Université Pierre et Marie-Curie-Paris, Laboratoire d’...

The diversity of the morphologies, propulsion mechanisms, flow environments, and behaviors of planktonic microorganisms has long provided inspiration for fluid physicists, with further intrigue provided by the counterintuitive hydrodynamics of their viscous world. Motivation for studying the fluid dynamics of microplankton abounds, as microorganisms support the food web and control the biogeoch...

Planktonic communities are shaped through a balance of local evolutionary adaptation and ecological succession driven in large part by migration. The timescales over which these processes operate are still largely unresolved. Here we use Lagrangian particle tracking and network theory to quantify the timescale over which surface currents connect different regions of the global ocean. We find th...

Background: Pseudomonas aeruginosa is a versatile and opportunistic human pathogen whose virulence derives from several factors as extracellular proteases, pyocyanin and pyoverdin and biofilm formation, among others. Dexamethasone is a glucocorticoid widely used as anti-inflammatory. Despite its immunosuppressive role, the interplay between dexamethasone and bacterial virulence remains uncovere...

Referee3: Review of the manuscript "Reconciling single chamber Mg/Ca with whole test d18O in surface to deep dwelling planktonic foraminifera from the Mozambique Channel“ by J. Steinhardt, C. Cleroux, L. de Nooijer, G.-J. Brummer, R. Zahn, G. Ganssen, and G.-J. Reichart. This manuscript presents a large data set of single specimen stable isotopes and single chamber Mg/Ca on four species of plan...