C-Type Natriuretic Peptide Acts as a Microorganism-Activated Regulator of the Skin Commensals and in Dual-Species Biofilms.

The effect of C-type natriuretic peptide in a concentration closer to the normal level in human blood plasma was studied on the mono-species and dual-species biofilms of the skin commensal bacteria HL043PA2 and ATCC14990. Despite the marginal effect of the hormone on cutibacteria in mono-species biofilms, the presence of staphylococci in the community resulted in a global shift of the CNP effect, which appeared to increase the competitive properties of , its proliferation and the metabolic activity of the community. was mostly inhibited in the presence of CNP.

Epinephrine extensively changes the biofilm matrix composition in C01 isolated from human skin.

The importance of the impact of human hormones on commensal microbiota and microbial biofilms is established in lots of studies. In the present investigation, we continued and extended the research of epinephrine effects on the skin commensal C01 and its biofilms, and also the matrix changes during the biofilm growth. Epinephrine in concentration 4.

The Impact of Norepinephrine on Mono-Species and Dual-Species Staphylococcal Biofilms.

The effect of norepinephrine ("NE") on Gram-negative bacteria is well characterized; however, little is known about the impact of NE on cutaneous Gram-positive skin residents, especially staphylococci. In this study, the impact of NE on monospecies and dual-species biofilms of and model strains was investigated for the first time. Biofilms were grown in two different models (on polytetrafluoroethylene ("PTFE") cubes and glass microfiber filters ("GMFFs")) and additionally kinetic measurements of bacterial growth was performed.

Atrial Natriuretic Peptide Affects Skin Commensal and Dual-Species Biofilms.

The first evidence of the atrial natriuretic peptide (ANP) effect on mono-species and dual-species biofilms of skin commensals and was obtained in different model systems. Elucidation of the mechanism of action of hormones on the microbial communities of human skin is an important physiological and medical aspect. Under anaerobic conditions, ANP at a concentration of 6.

Genome of a Novel Bacterium " Jettenia ecosi" Reconstructed From the Metagenome of an Anammox Bioreactor.

The microbial community of a laboratory-scale bioreactor based on the anammox process was investigated by using metagenomic approaches and fluorescent hybridization (FISH). The bioreactor was initially inoculated with activated sludge from the denitrifying bioreactor of a municipal wastewater treatment station. By constantly increasing the ammonium and nitrite load, a microbial community containing the novel species of anammox bacteria " Jettenia ecosi" developed in the bioreactor after 5 years when the maximal daily nitrogen removal rate reached 8.

Composition of the Biofilm Matrix of Acneic Strain RT5.

In skin, (former ) can behave as an opportunistic pathogen, depending on the strain and environmental conditions. Acneic strains of form biofilms inside skin-gland hollows, inducing inflammation and skin disorders. The essential exogenous products of accumulate in the extracellular matrix of the biofilm, conferring essential bacterial functions to this structure.