Moraxellaceae

species of bacterium

Acinetobacter is a genus of Gram-negative bacteria belonging to the wider class of Gammaproteobacteria. Acinetobacter species are oxidase-negative, exhibit twitching motility, and occur in pairs under magnification.

The Moraxellaceae are a family of Gammaproteobacteria, including a few pathogenic species. Others are harmless commensals of mammals and humans or occur in water or soil. The species are mesophilic or psychrotrophic (Psychrobacter).

species of bacterium

Moraxella is a genus of gram-negative bacteria in the family Moraxellaceae. It is named after the Swiss ophthalmologist Victor Morax. The organisms are short rods, coccobacilli, or as in the case of Moraxella catarrhalis, diplococci in morphology, with asaccharolytic, oxidase-positive, and catalase-positive properties. M. catarrhalis is the clinically most important species under this genus.

species of bacterium

Psychrobacter is a genus of Gram-negative, osmotolerant, oxidase-positive, psychrophilic or psychrotolerant, aerobic bacteria which belong to the family Moraxellaceae and the class Gammaproteobacteria. The shape is typically cocci or coccobacilli. Some of those bacteria were isolated from humans and can cause humans infections such as endocarditis and peritonitis. This genus of bacteria is able to grow at temperatures between −10 and 42 °C. Rudi Rossau found through DNA-rRNA hybridization analysis that Psychrobacter belongs to the Moraxellaceae. The first species (Psychrobacter immobilis)

The only species of Branhamella (Branhamella catarrhalis) is reclassified to Moraxella catarrhalis.

Enhydrobacter is a genus of bacteria which belongs to the class Alphaproteobacteria. So far, only one species is known (Enhydrobacter aerosaccus). Enhydrobacter has been discussed to be reclassified to the family Rhodospirillaceae and the class Alphaproteobacteria. Because of its oxidase positive it can not be placed in the family Enterobacteriaceae as it is not a parasite of birds or mammals.