| isolation of a spotted fever group rickettsia from the pacific coast tick, ixodes pacificus, in oregon. | a rickettsia of the spotted fever group was isolated on three occasions from ixodes pacificus in western oregon. these isolations, and additional evidence furnished by complement fixation tests on guinea pigs inoculated with other oregon ticks of this species, indicate that the association of this rickettsia with the pacific coast tick may be widespread. this is the first isolation of a spotted fever group rickettsia from i. pacificus. because the oregon isolates are mildly virulent for guinea p ... | 1976 | 937637 |
| serotypes of tick-borne spotted fever group rickettsiae from western california. | a rickettsial survey of ixodid ticks known to bite man was conducted in 1979 in four coastal counties of california to obtain isolates from tick species that might be involved in the transmission of spotted fever-like illnesses, and to examine serologic characteristics of the rickettsiae relative to defined members of the spotted fever group (sfg). one hundred and seventy (19.4%) of 877 ticks comprising three species were shown by hemolymph test to harbor rickettsia-like organisms. a total of 85 ... | 1981 | 6789691 |
| 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 |