| rickettsia parkeri in amblyomma americanum ticks, tennessee and georgia, usa. | to determine the geographic distribution of the newly recognized human pathogen rickettsia parkeri, we looked for this organism in ticks from tennessee and georgia, usa. using pcr and sequence analysis, we identified r. parkeri in 2 amblyomma americanum ticks. this rickettsiosis may be underdiagnosed in the eastern united states. | 2009 | 19788817 |
| rickettsia parkeri and rickettsia montanensis, kentucky and tennessee, usa. | we found that 14.3% (15/105) of amblyomma maculatum and 3.3% (10/299) of dermacentor variabilis ticks collected at 3 high-use military training sites in west-central kentucky and northern tennessee, usa, were infected with rickettsia parkeri and rickettsia montanensis, respectively. these findings warrant regional increased public health awareness for rickettsial pathogens and disease. | 0 | 25271771 |
| specifying pathogen associations of amblyomma maculatum (acari: ixodidae) in western tennessee. | amblyomma maculatum koch (acari: ixodidae) is established in western tennessee, a region with increased risk for rocky mountain spotted fever and ehrlichiosis. this tick transmits rickettsia parkeri to humans, likely contributing to cases of rickettsiosis in the region. the objective was to determine pathogen associations within questing and host-collected a. maculatum, and identify ecological factors associated with pathogen infection that may increase the effectiveness of surveillance methods. ... | 2016 | 26744464 |
| human infections by multiple spotted fever group rickettsiae in tennessee. | rocky mountain spotted fever is the most common tick-borne disease in tennessee. however, rickettsia rickettsii has rarely been isolated from endemic ticks, suggesting rickettsioses may be caused by other species. a total of 56 human serum samples that were serologically positive for exposure to rickettsia were obtained from commercial laboratories in 2010 and 2011. in addition, 20 paired sera from patients with encephalitis and positive rickettsia serology were obtained from the tennessee unexp ... | 2016 | 27022147 |