Canadian Medical Guide > Organisms > Bacteria > Gram-Negative Bacteria > Gram-Negative Anaerobic Bacteria > Gram-Negative Anaerobic Straight, Curved, and Helical Rods > Chromatium Terms and Definitions
Chromatium
Medical Definition: | A genus of gram-negative, ovoid to rod-shaped bacteria that is phototrophic. All species use ammonia as a nitrogen source. Some strains are found only in sulfide-containing freshwater habitats exposed to light while others may occur in marine, estuarine, and freshwater environments. |
Guide Notes: | in water |
Chromatium Medical Definitions and Terms
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