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Clinical Microbiology Reviews, 10 1997, 694-719, Vol 10, No. 4
D Raoult and V Roux
Rickettsioses are caused by species of Rickettsia, a genus comprising
organisms characterized by their strictly intracellular location and their
association with arthropods. Rickettsia species are difficult to cultivate
in vitro and exhibit strong serological cross-reactions with each other.
These technical difficulties long prohibited a detailed study of the
rickettsiae, and it is only following the recent introduction of novel
laboratory methods that progress in this field has been possible. In this
review, we discuss the impact that these practical innovations have had on
the study of rickettsiae. Prior to 1986, only eight rickettsioses were
clinically recognized; however, in the last 10 years, an additional six
have been discovered. We describe the different steps that resulted in the
description of each new rickettsiosis and discuss the influence of factors
as diverse as physicians' curiosity and the adoption of molecular
biology-based identification in helping to recognize these new infections.
We also assess the pathogenic potential of rickettsial strains that to date
have been associated only with arthropods, and we discuss diseases of
unknown etiology that may be rickettsioses.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Rickettsioses as paradigms of new or emerging infectious diseases
Unite des Rickettsies, Faculte de Medecine, CNRS UPRESA 6020, Marseille, France. raoult@medecine.univ-mrs.fr
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