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Appl Environ Microbiol. 1970 June; 19(6): 963-965
Copyright © 1970 American Society for Microbiology. All Rights Reserved.
Biological Sciences Laboratories, Fort Detrick, Frederick, Maryland 21701
ABSTRACT
The plaque assay procedure developed for spotted fever and typhus group rickettsiae is also appropriate for scrub typhus and Q fever rickettsiae. The plaque titers of suspensions of Rickettsia tsutsugamushi and Coxiella burnetii compared favorably with end points obtained by titrations in mice.
1 Present address: Microbiological Associates, Inc., Bethesda, Md. 20014.
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