A genus of gram-negative, sheathed, rod-shaped bacteria in the family COMAMONADACEAE. They are closely related to LEPTOTHRIX.

A large group of aerobic bacteria which show up as pink (negative) when treated by the gram-staining method. This is because the cell walls of gram-negative bacteria are low in peptidoglycan and thus have low affinity for violet stain and high affinity for the pink dye safranine.

A group of rods or cocci whose taxonomic affinities are uncertain. They form endospores, thick-walled bodies formed within the vegetative cells of certain bacteria, able to withstand adverse environmental conditions for prolonged periods.

Inorganic or organic compounds that contain sulfur as an integral part of the molecule.

Refuse liquid or waste matter carried off by sewers.

Contamination of bodies of water (such as LAKES; RIVERS; SEAS; and GROUNDWATER.)

The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms.

DNA sequences encoding RIBOSOMAL RNA and the segments of DNA separating the individual ribosomal RNA genes, referred to as RIBOSOMAL SPACER DNA.

Hydrocarbon rings which contain two ketone moieties in any position. They can be substituted in any position except at the ketone groups.

Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.