Nutritional interference for phenotypic biofilm quantification in Aeromonas spp. isolates containing the fla gene.

The Aeromonas genus has several virulence factors associated with the development of diseases in aquatic organisms, leading to losses in aquaculture. One of these factors is the flagella's formation which allows the biofilm's formation that provides the microorganisms a greater pathogenicity, greater protection to certain substances such as antibiotics. The aim of the study was to verify the presence of the fla gene, related to biofilm production in isolates of Aeromonas spp.

Antibacterial behavior of polypyrrole: The influence of morphology and additives incorporation.

The antibacterial behavior of polypyrrole (PPy) depends on a diversity of structural parameters such as surface area, aggregation level and additives (metal nanoparticles) incorporation. This paper summarizes the influence of different preparation procedures of PPy on action of resulting antibacterial composite against Escherichia coli, Staphylococcus aureus and Klebsiella pneumoniae. The bactericidal action has been assigned to morphology (size of polypyrrole nanoparticles).