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pubmed:abstractText |
Rickettsia spp. (Rickettsiales: Rickettsiaceae) are Gram-negative, obligate intracellular, alpha-proteobacteria that have historically been associated with blood-feeding arthropods. Certain species cause typhus and spotted fevers in humans, but others are of uncertain pathogenicity or may be strict arthropod endosymbionts. Genetic manipulation of rickettsiae should facilitate a better understanding of their interactions with hosts.
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