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Bacterial loads in tissues during rickettsial infection after intravenous inoculations and by tick transmission. A: Levels of rickettsial citrate synthase gene copies in tissues at day 6 after intravenous infection by Rickettsia parkeri in different strains of mice. B: Levels of rickettsial citrate synthase gene copies in tissues from C3H/HeN mice infected with R. parkeri by tick transmission on day 6 after tick attachment.
