On the Nomenclature and Classification of Chlamydiae

R. R. Vafin^a, R. Kh. Ravilov^a, Kh. Z. Gaffarov^b, A. Z. Ravilov^b,
G. M. Iskhakov^a, I. Kh. Bakirov^a, and V. N. Kashov^a

^a FGOU VPO Bauman State Academy of Veterinary Medicine, Kazan, Russia

^b FGU Federal Center of Toxicological and Radiation Safety of Animals, Kazan, Russia

Received January 17, 2007

Abstract—Results of molecular genetic research on typical specimens of the genus Chlamydophila, the family
Chlamydiaceae, which were provided by the Federal Center of Toxicological and Radiation Safety of Animals
from its collection of microorganisms, are presented in this paper as to their taxonomic attribution on the basis
of a comparative analysis of the omp1, omp2, 16S rRNA and 23S rRNA genes with the corresponding genomic
fragments of officially registered species of chlamydiae and the presence of an extrachromosomal plasmid.
According to the results of the omp1-restriction-fragment-length-polymorphism (RFLP)-AluI-profile analysis,
the strains Rostinovo-70, 250, PP-87 and KC-93 are distinguished by the characteristic of a novel chlamydial
genotype, earlier unstudied, G, by our designation. In the course of comparative omp2-gene analysis in the
strains Rostinovo-70, 250, PP-87, and KC-93, a new, previously undescribed, omp2-RFLP-AluI profile of
chlamydiae was described. According to the chlamydial species identification by genetic and ecological crite-
ria, the Rostinovo-70, 250, PP-87, and KC-93 strains can be classified as a new species of Chlamydiaceae—
Chlamydophila parapsittaci sp. nov. It is also suggested to combine into a new species the following Chlamy-
dophila psittaci strains: WC, NJ1, 921293, TT3, 7344/2, GD, CT1, Par1, 84/2334, R54, VS225, 777B15, and
Prk/Daruma.

DOI:10.3103/S0891416807040040

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