A family of Gram-negative bacteria in which the cells are rod-shaped or ovoid, some-times pleomorphic and filamentous, and non-motile. They are facultatively anaerobic. Metabolism is chemo-organotrophic and the organisms are nutritionally fastidious. All members are parasitic or pathogenic in humans, other animals, and/or birds and some can cause disease.
Subjects: Plant Sciences and Forestry.