Psychrobacter
Psychrobacter is a genus of Gram-negative, osmotolerant, oxidase-positive, psychrophilic or psychrotolerant, aerobic bacteria which belong to the family of Moraxellaceae and the class of Gammaproteobacteria. The shape is typically cocci or coccobacilli. Some of those bacteria were isolated from humans and can cause humans infections like endocarditis and peritonitis. This genus of bacteria is capable to grow at temperatures between −10 °C and 42 °C. Rudi Rossau found through DNA-rRNA hybridization analysis, that Psychrobacter belongs to the family of Moraxellaceae. The first species (Psychrobacter immobilis) was described by Ellioz Juni and Gloria A. Heym. Psychrobacter occur in wide range of moist, cold saline habitats. But they also occur in warm and slightly saline habitats.