The Journal of Experimental Medicine
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The Journal of Experimental Medicine, Vol 131, 1342-1357, Copyright © 1970 by The Rockefeller University Press

ARTICLE

STUDIES ON THE ULTRASTRUCTURE OF BORDETELLA PERTUSSIS : I. MORPHOLOGY, ORIGIN, AND BIOLOGICAL ACTIVITY OF STRUCTURES PRESENT IN THE EXTRACELLUAR FLUID OF LIQUID CULTURES OF BORDETELLA PERTUSSIS



Jane H. Morse M.D.1 and Stephen I. Morse M.D.1

1 From the Department of Medicine, Columbia University, College of Physicians and Surgeons, New York 10032 and the Department of Microbiology and Immunology, State University of New York, Downstate Medical Center, Brooklyn, New York 11203

Two distinct particles have been recognized in the extracellular fluid of B. pertussis cultures. Both appeared to arise from the surface (cell wall) of the organism.

One of these, a membranous particle, seemed to derive from long projections on the organism composed of the outer membrane of the cell wall.

The second particle, a fine filament, was not readily comparable with any previously described bacterial structure.

The two particles could be separated from each other by gradient centrifugation in CsCl.

Lymphocytosis-promoting factor and histamine-sensitizing activity were only associated with fractions containing the fine filaments.

 Submitted on December 30, 1969


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