| spotted-fever group rickettsia in dermacentor variabilis, maryland. | three-hundred ninety-two adult dermacentor variabilis were collected from six maryland counties during the spring, summer, and fall of 2002. infection prevalence for spotted fever group rickettsia was 3.8%, as determined by polymerase chain reaction. single strand conformational polymorphism (sscp) analysis followed by sequencing indicated that all infections represented a single rickettsial taxon, rickettsia montanensis. | 2004 | 15496254 |
| infrequency of rickettsia rickettsii in dermacentor variabilis removed from humans, with comments on the role of other human-biting ticks associated with spotted fever group rickettsiae in the united states. | abstract from 1997 to 2009, the tick-borne disease laboratory of the u.s. army public health command (usaphc) (formerly the u.s. army center for health promotion and preventive medicine) screened 5286 dermacentor variabilis ticks removed from department of defense (dod) personnel, their dependents, and dod civilian personnel for spotted fever group rickettsiae using polymerase chain reaction and restriction fragment length polymorphism analysis. rickettsia montanensis (171/5286 = 3.2%) and ricke ... | 2010 | 21142953 |