| collections of dermacentor parumapertus from cattle. | | 1965 | 5848806 |
| the distribution of dermacentor hunteri and anaplasma sp. in desert bighorn sheep (ovis canadensis). | the ixodid tick dermacentor hunteri has been collected intermittently this century, primarily from desert bighorn sheep (ovis canadensis). anaplasma spp. are intraerythrocytic rickettsial parasites of ungulates and are vectored in the western united states by ticks of the genus dermacentor. we tested the hypotheses that d. hunteri would be found infesting all populations of desert bighorn, and that all infested populations would be seropositive for anaplasma sp. dermacentor hunteri was found on ... | 1997 | 9057693 |
| rocky mountain spotted fever from an unexpected tick vector in arizona. | rocky mountain spotted fever is a life-threatening, tick-borne disease caused by rickettsia rickettsii. this disease is rarely reported in arizona, and the principal vectors, dermacentor species ticks, are uncommon in the state. from 2002 through 2004, a focus of rocky mountain spotted fever was investigated in rural eastern arizona. | 2005 | 16093467 |
| distribution, seasonality, and hosts of the rocky mountain wood tick in the united states. | anaplasma marginale theiler is a tick-borne pathogen that causes anaplasmosis in cattle. there are approximately 20 tick species worldwide that are implicated as vectors of this pathogen. in the united states, dermacentor andersoni stiles and dermacentor variabilis (say) are the principal vectors. the risk of transmission of anaplasmosis to cattle has been largely based on the distribution of d. andersoni in the united states. we developed a centralized geographic database that incorporates coll ... | 2006 | 16506443 |
| an outbreak of rocky mountain spotted fever associated with a novel tick vector, rhipicephalus sanguineus, in arizona, 2004: preliminary report. | this study describes preliminary results of an investigation of rmsf in arizona associated with the brown dog tick, rhipicephalus sanguineus. high numbers of dogs and heavy infestations of ticks created a situation leading to human disease. | 2006 | 17114736 |
| molecular typing of novel rickettsia rickettsii isolates from arizona. | seven isolates of rickettsia rickettsii were obtained from a skin biopsy, two whole-blood specimens, and from rhipicephalus sanguineus ticks from eastern arizona. molecular typing of seven isolates of r. rickettsii and dna samples from two other rh. sanguineus ticks infected with r. rickettsii was conducted by pcr and dna sequencing of rompa and 12 variable-number tandem repeat regions (vntrs). all dna specimens from arizona were identical to each other and to reference human and dermacentor and ... | 2006 | 17114781 |
| a tick from a prehistoric arizona coprolite. | ticks have never been reported in archaeological analyses. here, we present the discovery of a tick from a coprolite excavated from antelope cave in extreme northwest arizona. dietary analysis indicates that the coprolite has a human origin. this archaeological occupation is associated with the ancestral pueblo culture (anasazi). this discovery supports previous hypotheses that ticks were a potential source of disease and that ectoparasites were eaten by ancient people. | 2008 | 18372655 |