| absence of rickettsia rickettsii and occurrence of other spotted fever group rickettsiae in ticks from tennessee. | rocky mountain spotted fever (rmsf) is the most common tick-borne illness in tennessee. little is known about the occurrence of r. rickettsii, the causative agent, in ticks in tennessee. to better understand the prevalence and distribution of rickettsial agents in ticks, we tested 1,265 amblyomma, dermacentor, and ixodes adult and nymphal ticks. additionally, we tested 231 amblyomma americanum larvae. ticks were collected from 49 counties from humans, wild animals, domestic canines, and flannel ... | 2010 | 20810834 |
| 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 |
| inadequacy of igm antibody tests for diagnosis of rocky mountain spotted fever. | among 13 suspected rocky mountain spotted fever (rmsf) cases identified through an enhanced surveillance program in tennessee, antibodies to rickettsia rickettsii were detected in 10 (77%) patients using a standard indirect immunofluorescent antibody (ifa) assay. immunoglobulin m (igm) antibodies were observed for 6 of 13 patients (46%) without a corresponding development of igg, and for 3 of 10 patients (30%) at least 1 year post-onset. however, recent infection with a spotted fever group ricke ... | 2014 | 25092818 |
| antibodies reactive to rickettsia rickettsii among children living in the southeast and south central regions of the united states. | the reported annual incidence of rocky mountain spotted fever in the united states is 2.2 per million, but studies have suggested that human infection with rickettsia rickettsii may be more common. this study estimated the prevalence of antibodies reactive to r rickettsii among children living in the southeastern and south central united states. | 2003 | 12742879 |
| consequences of delayed diagnosis of rocky mountain spotted fever in children--west virginia, michigan, tennessee, and oklahoma, may-july 2000. | patients with rocky mountain spotted fever (rmsf), a tickborne infection caused by rickettsia rickettsii, respond quickly to tetracycline-class antibiotics (e.g., doxycycline) when therapy is started within the first few days of illness; however, untreated rmsf may result in severe illness and death. persons aged <10 years have the highest age-specific incidence of rmsf. this report summarizes the clinical course and outcome of rmsf in four children from four regions of the united states and und ... | 2000 | 11055741 |
| zoonotic potential (rocky mountain spotted fever aed tularemia) in the tennessee valley region. ii. prevalence of rickettsia rickettsi and francisella tularensis in mammals and ticks from land between the lakes. | | 1974 | 4204021 |
| zoonotic potential (rocky mountain spotted fever and tularemia) in the tennessee valley region. i. ecologic studies of ticks infesting mammals in land between the lakes. | | 1974 | 4204030 |