MORPHOLOGICAL STRUCTURE OF RICKETTSIAE.
The morphological structures of the rickettsiae of epidemic and endemic typhus fever, Rocky Mountain spotted fever, and Q fever are similar to one another and to certain bacteria. The rickettsial organisms in common with the elementary bodies of vaccinia virus and all bacteria would appear to have a limiting membrane which surrounds a substance that seems to be protoplasmic in nature; numbers of dense granules are embedded in the inner protoplasm.
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Virus Laboratory, Army Medical School, Washington, D. C., and The Eldridge Reeves Johnson Foundation for Medical Physics, University of Pennsylvania, Philadelphia.
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Anderson
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Chambers
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