The Classification and Nomenclature of Organisms of the Pleuropneumonia Group Edward, D. G. ff. and Freundt, E. A.,, 14, 197-207 (1956), doi = https://doi.org/10.1099/00221287-14-1-197, publicationName = Microbiology Society, issn = 1350-0872, abstract= The taxonomic status of the micro-organisms of the pleuropneumonia group has remained confused for many years. There is no generally accepted nomenclature or classification, although the need for these has been widely recognized and has become more urgent with the increasing number of new strains of pleuropneumonia-like organisms isolated. Recently Freundt (1955) and Edward (1955) made proposals for classifying and naming these organisms. Although published separately their proposals were in close agreement with each other, as a result of previous informal exchanges of views between the authors. However, it was felt that the publication of two separate papers, each of which provided lists of named species differing from each other only slightly, might cause confusion, particularly as both papers unfortunately contained a number of printing errors. Therefore, it was decided to prepare a joint paper. It is hoped that the proposals made will provide a basis for discussion among those interested in this group of organisms, and will lead to the adoption of a nomenclature which commands general agreement. It is also felt that the study of strains of pleuropneumonia-like organisms may be stimulated by the establishment of named species., language=, type=