Bacteria colonizing dishwasher rubber seal. Metagenome. Bacteria

Investigation of bacteria that colonise the extreme environment of household dishwasher rubber seals was performed. Metagenomic assessment of the bacterial biodiversity of the dishwasher rubber seals showed the predominance of Gram-positive bacteria, as primarily Actinobacteria dominated by Gordonia, followed by Proteobacteria dominated by Gammaproteobacteria, and by pathogenic species such as Escherichia sp., Acinetobacter baumannii, Pseudomonas sp., Stenotrophomonas maltophilia, and Enterobacter sp.. Metagenomic assessment of bacterial biodiversity in the tap water connected to dishwashers revealed predominance of Gram-negative bacteria, and in particular Proteobacteria, dominated by Betaproteobacteria, mainly represented by Tepidimonas sp.. Both Actinobacteria and Firmicutes showed low numbers, while there were markedly more Alphaproteobacteria and Betaproteobacteria in the tap water.