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Identification of Two Pathogenic Avian Mycoplasmas as Strains of Mycoplasma pullorum

¹ Unité de Recherches Mycoplasmologie-Bactériologie, Centre Nationale d'Etudes Vétérinaires et Alimentaires, Ploufragan Zoopole, 22440 Ploufragan, France
² Laboratoire de Biologie Cellulaire et Moléculaire, Institut National de la Recherche Agronomique et Université de Bordeaux II, 33883 Villenave d'Omon Cedex, France

^* Corresponding author. Mailing address: Laboratoire de Biologie Cellulaire et Moléculaire, INRA, 71 avenue Edouard-Bourleaux, B.P. 81, 33883 Villenave d'Ornon Cedex, France. Phone: (33) 5 56 84 31 50. Fax: (33) 5 56 84 31 59. E-mail: laigret{at}bordeaux.inra.fr.

ABSTRACT

Two mycoplasma strains were isolated from dead turkey embryos. Growth properties, biochemical and serological characteristics, and protein profiles indicated that these strains were closely related to Mycoplasma pullorum CKK^T (T = type strain). This was confirmed by 16S rRNA sequence analysis, and the phylogenetic position of M. pullorum was established. Pathogenicity studies showed that the two strains, as well as M. pullorum CKK^T, induced a statistically significant level of mortality after inoculation into chicken embryos.