Publications

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evidence of tick-borne organisms in mule deer (odocoileus hemionus) from the western united states.free-ranging mule deer (md; odocoileus hemionus) from arizona and california were tested for evidence of infection with several tick-borne pathogens, including species of ehrlichia, anaplasma, babesia, and borrelia. of 125 mule deer tested from arizona, 29 (23%) and 11 (9%) had antibodies reactive to e. chaffeensis and a. phagocytophilum by indirect immunofluorescent antibody testing, respectively; none of the six md tested from california were seropositive. using a commercial competitive elisa ...200516417431
columbian black-tailed deer (odocoileus hemionus columbianus) as hosts for borrelia spp. in northern california.the prevalence of infection of columbian black-tailed deer (odocoileus hemionus columbianus) with borrelia spp. was evaluated in an area of northwestern california (usa) where lyme disease is endemic and the relapsing-fever group spirochete borrelia coriaceae is enzootic, and in a far-removed comparison area having a disparate climate and lower density of vector ticks. blood samples collected from both deer herds in 1987, 1988, and from 2000-02 were assayed for borrelial infection with microscop ...200515827217
interlaboratory and intralaboratory comparisons of indirect immunofluorescence assays for serodiagnosis of lyme disease.a conventional indirect immunofluorescence assay (ifa) and an anticomplement indirect immunofluorescence assay (acif) for detecting serum antibodies to borrelia burgdorferi in humans were evaluated during a prevalence survey in northern california. sera obtained from 119 current or former residents of an area in which lyme disease is endemic were split and tested by the ifa in two laboratories and the acif in a third. the seropositivity rate ranged from 15 to 20% with 88 to 93% agreement among l ...19902203813
relapsing fever group borrelia in southern california rodents.wild rodent reservoir host species were surveyed prospectively for infection with borrelia hermsii, the causative agent of tick-borne relapsing fever in the western united states. trapping occurred during the summer of 2009-2012 at field sites surrounding big bear lake, ca, a region where human infection has been reported for many years. using quantitative polymerase chain reaction (qpcr), we tested 207 rodents from 11 species and found chipmunks (tamias spp.) and a woodrat (neotoma macrotis) in ...201425276933
co-infection of ornithodoros coriaceus with the relapsing fever spirochete, borrelia coriaceae, and the agent of epizootic bovine abortion.the soft tick, ornithodoros coriaceus (koch) (acari: argasidae), is a common mammalian parasite of livestock in many arid regions of the western u.s.a. the tick is a known vector of the undescribed bacterial pathogen that causes epizootic bovine abortion (eba), which results in late-term abortions in beef cattle and subsequent economic loss, which can be considerable, to producers. a second reported bacterial pathogen, borrelia coriaceae, a member of the relapsing fever complex, has also been id ...201121410735
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