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Proposal for Designation of F38-Type Caprine Mycoplasmas as Mycoplasma capricolum subsp. capripneumoniae subsp. nov. and Consequent Obligatory Relegation of Strains Currently Classified as M. capricolum (Tully, Barile, Edward, Theodore, and Ernø 1974) to an Additional New Subspecies, M. capricolum subsp. capricolum subsp. nov.

¹National Collection of Type Cultures and Respiratory and Systemic Infections Laboratory, Central Public Health Laboratory, London NW9 5HT, England
²Institute of Medical Microbiology, University of Aarhus, Aarhus, Denmark
³Chief Scientist's Group, Science Division, Ministry of Agriculture, Fisheries and Food, London SW1P 3JR, England

^* Corresponding author.

ABSTRACT

A subspecies relationship with the existing species Mycoplasma capricolum is appropriate for the F38 group of mycoplasmas, the causative agent of classical contagious caprine pleuropneumonia. We believe that this classification is justified on the basis of the close DNA-DNA relationship recently reported for isolates belonging to the two groups and the other known serological and biological similarities and differences of these organisms. Strain F38^T (T = type strain) and taxonomically indistinguishable strains are therefore proposed as members of a new subspecies of M. capricolum, M. capricolum subsp. capripneumoniae. Strain F38 (= NCTC 10192) is the type strain of M. capricolum subsp. capripneumoniae subsp. nov. As a consequence of this subdivision of the species M. capricolum, strains previously classified as M. capricolum are now necessarily relegated to subspecies status, as M. capricolum subsp. capricolum subsp. nov. Strain California kid (= ATCC 27343 = NCTC 10154) is the type strain of M. capricolum, as well as of M. capricolum subsp. capricolum. A taxonomic description of M. capricolum subsp. capripneumoniae and a brief amended description of M. capricolum subsp. capricolum are presented.

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