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J Bacteriol. 1968 May; 95(5): 1504-1512
Copyright © 1968 American Society for Microbiology. All Rights Reserved.

Physiological and Serological Comparisons Among Strains of Mycoplasma granularum and Mycoplasma laidlawii

Joseph G. Tully1 and Shmuel Razin2

1 Laboratory of Bacterial Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland 20014
Department of Clinical Microbiology, The Hebrew University, Hadassah Medical School, Jerusalem, Israel

ABSTRACT

Mycoplasma granularum strains grew on a medium devoid of animal serum or of serum fractions containing sterols; all strains possessed properties, including carotenoid biosynthesis, similar to those described for M. laidlawii. Some common antigenic components were noted among M. granularum and M. laidlawii strains by indirect fluorescent-antibody tests. The growth of M. granularum strains was slightly inhibited by antiserum to M. laidlawii PG-8, and the electrophoretic patterns of cell proteins of the M. granularum strains showed a close resemblance to that of M. laidlawii. However, direct fluorescent-antibody procedures performed on colonies grown on a serum-free medium clearly distinguished M. granularum from M. laidlawii. The occurrence of nonsterol-requiring mycoplasmas, in addition to M. laidlawii, raises questions as to the taxonomy of M. granularum and of the saprophytic mycoplasmas in general.

J Bacteriol. 1968 May; 95(5): 1504-1512
Copyright © 1968 American Society for Microbiology. All Rights Reserved.



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