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Mycoplasma phocarhinis sp. nov. and Mycoplasma phocacerebrale sp. nov., Two New Species from Harbor Seals (Phoca vitulina L.)

Institut für Mikrobiologie und Tierseuchen, Tierärztliche Hochschule Hannover, Bischofsholer Damm 15, D-3000 Hannover, Federal Republic of Germany

^* Corresponding author.

ABSTRACT

A total of 120 mycoplasma strains were recovered from 97 of 265 diseased seals investigated during the seal epidemic in the North Sea and in the Baltic Sea in 1988. Mycoplasmas were isolated from the respiratory tracts (including lungs), hearts, brains, and eyes of the seals. Thirty strains were filter cloned and investigated for their morphological, biochemical, and serological characteristics compared with the characteristics of previously described species. The results of an indirect immunofluorescence test, a growth inhibition test, and an immunobinding assay showed that these strains belong to two new species, for which the names Mycoplasma phocarhinis and Mycoplasma phocacerebrale are proposed. M. phocarhinis (17 strains) did not ferment glucose or hydrolyze arginine but did reduce tetrazolium chloride and potassium tellurite and produced films and spots. M. phocacerebrale (13 strains) metabolized arginine but not glucose and produced phosphatase but did not reduce tetrazolium chloride and potassium tellurite. Both species lysed sheep erythrocytes but did not absorb sheep or guinea pig erythrocytes. The type strain of M. phocarhinis is strain 852 (= ATCC 49639), and the type strain of M. phocacerebrale is strain 1049 (= ATCC 49640).