Publications

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serological evidence of california serogroup virus activity in oregon.we wished to demonstrate evidence of the presence of california serogroup viruses in oregon and to test for the presence of certain other arboviruses in large ungulates. blood samples from black-tailed deer (odocoileus hemionus columbianus), mule deer (o. hemionus hemionus), and roosevelt elk (cervus elaphus roosevelti) from nine counties in oregon were tested by serum-dilution plaque reduction neutralization for antibody to california serogroup viruses, including snowshoe hare, california encep ...19873586196
prevalence of eyeworm in three populations of columbian black-tailed deer in northwestern oregon. 19744474385
parelaphostrongylus odocoilei in columbian black-tailed deer from oregon.documenting the occurrence of parelaphostrongylus odocoilei has historically relied on the morphological examination of adult worms collected from the skeletal muscle of definitive hosts, including deer. recent advances in the knowledge of protostrongylid genetic sequences now permit larvae to be identified. dorsal-spined larvae (dsls) collected in 2003-2004 from the lung and feces of six columbian black-tailed deer (odocoileus hemionus columbianus) from oregon were characterized genetically. th ...200617092883
effects of an invasive forest pathogen on abundance of ticks and their vertebrate hosts in a california lyme disease focus.invasive species, including pathogens, can have important effects on local ecosystems, including indirect consequences on native species. this study focuses on the effects of an invasive plant pathogen on a vertebrate community and ixodes pacificus, the vector of the lyme disease pathogen (borrelia burgdorferi) in california. phytophthora ramorum, the causative agent of sudden oak death, is a non-native pathogen killing trees in california and oregon. we conducted a multi-year study using a grad ...201020941513
bovicola tibialis (phthiraptera:trichodectidae): occurrence of an exotic chewing louse on cervids in north america.through a recent (2003-2007) survey of ectoparasites on hoofed mammals in western north america, a literature review, and examination of archived museum specimens, we found that the exotic deer-chewing louse, bovicola tibialis (piaget), is a long-term, widespread resident in the region. the earliest known collection was from salt spring island, canada, in 1941. we found these lice on the typical host, that is, introduced european fallow deer (dama dama l.), and on asian chital (axis axis [erxleb ...201121337942
serosurvey for antibody to deerpox virus in five cervid species in oregon, usa.five cervid species in oregon, usa were tested with a serum neutralization assay for antibody to deerpox virus (dpv). none of the 50 elk (cervus elaphus ssp. roosevelti and nelsonii) had detectable antibody. prevalence of antibody to dpv in the remaining species was: 52% (n=55) in black-tailed deer (odocoileus hemionus columbianus), 32% (n= 59) in mule deer (o. hemionus hemionus), and 36% (n=50) in columbian white-tailed deer (o. virginianus leucurus), with an overall antibody prevalence of 40.2 ...201323307387
hair-loss syndrome in black-tailed deer of the pacific northwest.a widespread hair-loss syndrome (hls) has affected columbian black-tailed deer (odocoileus hemionus columbianus) in western oregon and washington (usa) since 1996. in order to better characterize the condition, 21 hls-affected black-tailed deer (btd) were necropsied, and body condition, parasite burdens, and significant lesions were noted. all deer were in poor body condition, and at least 17 had severe internal parasite burdens. a consistent finding was the presence of large numbers of chewing ...200415650084
hybrid swarm between divergent lineages of mule deer (odocoileus hemionus).studies of hybrid zones have revealed an array of evolutionary outcomes, yet the underlying structure is typically characterized as one of three types: a hybrid zone, a hybrid swarm or a hybrid taxon. our primary objective was to determine which of these three structures best characterizes a zone of hybridization between two divergent lineages of mule deer (odocoileus hemionus), mule deer and black-tailed deer. these lineages are morphologically, ecologically and genetically distinct, yet hybrid ...201122066874
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