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Ureaplasma canigenitalium sp. nov., Isolated from Dogs

¹ Animal Center for Biomedical Research, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
² National Institute of Animal Health, Tsukuba, Ibaraki 305, Japan
⁴ Department of Veterinary Microbiology, Faculty of Agriculture, Kagoshima University, Koorimoto, Kagoshima 890, Japan
³ Scale Up Department, Genetic Therapy, Inc., Gaithersburg, Maryland 20878
⁵ Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland 20892

^* Corresponding author.

ABSTRACT

Ureaplasma strains isolated from dogs (Canis familiaris) were characterized and compared with the type strains of five previously described species of the genus Ureaplasma, Ureaplasma urealyticum(isolated from humans), Ureaplasma diversum(isolated from cattle), Ureaplasma gallorale(isolated from chickens), Ureaplasma cati(isolated from cats), and Ureaplasma felinum(isolated from cats). The canine strains hydrolyzed urea but not arginine or glucose, were membrane bound, lacked a cell wall, passed through 450-nm-pore-size membrane filters, required cholesterol for growth, and formed minute colonies (diameter, 20 to 140 µm) on agar medium. These canine ureaplasma strains have been reported to be members of four serovars. The four serovars of canine strains fell into a single group on the basis of their genomic properties, as determined by DNA-DNA hybridization. On the basis of these findings, we propose that ureaplasmas with these characteristics belong to a new species, Ureaplasma canigenitalium, with strain D6P-C (= ATCC 51252) as the type strain.

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