PMID: 6990267Feb 29, 1980Paper

An ultrastructural comparison of the cell envelopes of selected strains of Nocardia asteroides and Nocardia brasiliensis

Mycopathologia
T A BeadlesD J Knezek

Abstract

Growth curves were determined for three strains each of Nocardia asteroides and Nocardia brasiliensis. Two strains of N. brasiliensis and one strain of N. asteroides had longer lag periods of growth than the remaining three strains. All strains had generation times of approximately 5.5 hours. The ultrastructure of the cell envelope of each Nocardia strain in early stationary phase growth was also examined. All the strains had typical trilaminar cell walls and cell membranes. The thickness of the cell wall layers, especially the inner peptidoglycan layer, varied from strain to strain. The inner layer of two strains of N. brasiliensis and one strain of N. asteroides was 12 nm or more in thickness, while that of the remaining three strains was 7 nm thick. These observed differences in growth patterns and/or thickness of the cell wall layers could be correlated to the varying degrees of virulence as well as the divergent pathologies exhibited by these organisms.

References

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Citations

Dec 1, 1983·The Journal of Hygiene·B L Beaman, A M Sugar
Dec 1, 1986·Journal of Medical and Veterinary Mycology : Bi-monthly Publication of the International Society for Human and Animal Mycology·D ZachariasG San-Blas
Feb 25, 2010·BMC Microbiology·Siegbert RiegHubert Kalbacher
Jan 1, 1996·Dermatologic Clinics·N G Warren
Dec 1, 1986·Applied and Environmental Microbiology·J M WhiteJ J Gauthier
Sep 1, 1996·Clinical and Diagnostic Laboratory Immunology·R D TorresH Zlotnik

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