| culicoides boydi (diptera: ceratopogonidae): a potential vector of hemorrhagic disease viruses to desert bighorn sheep in southern california. | culicoides boydi new species is described from riverside county, ca. a taxonomic key, table of numerical characters, and female wing photographs are presented to distinguish it from the three other species of the culicoides pusillus species group of the subgenus avaritia. brief notes are presented on its biology and distribution and suspected vector potential in the transmission of bluetongue virus to desert bighorn sheep in california. | 1992 | 1334151 |
| serologic survey for brucellosis in feral swine, wild ruminants, and black bear of california, 1977 to 1989. | a retrospective analysis of brucellosis serologic testing results in eight wildlife species in california from 1977 to 1989 was done. samples were collected from 5,398 live-captured or hunter-killed animals and tested by combinations of up to six serologic tests for antibodies to brucella spp. twenty-three of 611 (3.8%) feral swine (sus scrofa), one of 180 (0.6%) black bear (ursus americanus), one of 355 (0.3%) california mule deer (odocoileus hemionus californicus), and one of 1,613 (0.06%) bla ... | 1992 | 1512866 |
| insects feeding on desert bighorn sheep, domestic rabbits, and japanese quail in the santa rosa mountains of southern california. | desert bighorn sheep (ovis canadensis cremnobates), a domestic rabbit (oryctolagus cuniculus), and japanese quail (coturnix japonica) were used as bait animals to collect blood-feeding flies in an area of active blue-tongue and epizootic hemorrhagic disease virus transmission. precipitin tests were used to confirm the blood source where feasible. eight species of culicoides, members of the leptoconops kerteszi group, simulium spp., anopheles franciscanus, and stomoxys calcitrans were collected f ... | 1992 | 1512887 |
| spatial and seasonal distribution of potential vectors of hemorrhagic disease viruses to peninsular bighorn sheep in the santa rosa mountains of southern california. | blood-feeding midges (culicoides sp. and leptoconops sp.) were sampled in the santa rosa mountains, riverside county, california (usa), to determine which species might be involved in the transmission of bluetongue and epizootic hemorrhagic disease viruses to peninsular bighorn sheep (ovis canadensis cremnobates). host-seeking midges were sampled with co2-baited suction traps over a period of 30 mo. nineteen species of culicoides and seven of leptoconops were collected. five of the culicoides sp ... | 1992 | 1602570 |
| epidemiology of two orbiviruses in california's native wild ruminants: preliminary report. | between 1978 and 1983 we collected more than 1,500 serum samples from california's native black-tailed deer (odocoileus hemionus columbianus), 4 races of mule deer (o. h. sp.), tule elk (cervus elaphus nannodes), roosevelt elk (c. e. roosevelti), pronghorn antelope (antilocapra americana), california bighorn sheep (ovis canadensis californiana), peninsular bighorn sheep (o. c. cremnobates) and desert bighorn sheep (o. c. nelsoni) and analyzed them for agar gel precipitating (agp) antibodies to b ... | 1985 | 2989899 |
| survey of desert bighorn sheep in california for exposure to selected infectious diseases. | from february 1983 to june 1985, 188 desert bighorn sheep (ovis canadensis nelsoni, = 161 and oc cremnobates, = 27) from 18 herds in 17 mountain ranges and one captive herd were caught, marked, and had blood, fecal, and nasal mucus samples collected. nasal swab specimens were cultured bacteriologically and virologically specifically for parainfluenza-3 (pi-3) virus. bacterial flora differed from herd to herd. pathogenic pneumophilic bacteria (eg, pasteurella sp) seldom were found. parainfluenza- ... | 1985 | 3878356 |
| prevalence of antibodies of selected infectious disease agents in the peninsular desert bighorn sheep (ovis canadensis cremnobates) of the santa rosa mountains, california. | | 1982 | 6285010 |
| survey of chronic sinusitis-induced skull anomalies in desert bighorn sheep. | bone anomalies were found in 20% of 630 skulls from desert bighorn sheep (ovis canadensis) representing populations of california bighorn (o canadensis californiana), lower california bighorn (o canadensis cremnobates), mexican bighorn (o canadensis mexicana), and nelson bighorn (o canadensis nelsoni) that are native to arizona, california, nevada, new mexico, and utah. the anomalies were extremely diverse, ranging from osteonecrosis within the matrix of the paranasal sinuses to extensive lysis ... | 1981 | 7327996 |
| characterization of an anaplasma ovis isolate from desert bighorn sheep in southern california. | to understand the role of bighorn sheep (ovis canadensis) in the epidemiology of anaplasmosis, we recovered a field isolate from a suspected enzootic area in southern california (usa). whole blood was collected from three desert bighorn sheep (ovis canadensis nelsoni) and inoculated into a susceptible splenectomized domestic sheep, calf and a susceptible spleen-intact bighorn sheep. no infection occurred in the calf, but a detectable infection developed in both the domestic sheep and bighorn she ... | 1993 | 8258851 |
| isolation and in vitro cultivation of babesia parasites from free-ranging desert bighorn sheep (ovis canadensis nelsoni) and mule deer (odocoileus hemionus) in california. | protozoal parasites of the genus babesia were isolated for the first time from free-ranging desert bighorn sheep (ovis canadensis nelsoni) and mule deer (odocoileus hemionus) populations in california by in vitro culture of host blood. these naturally infected animals did not have microscopically detectable parasitemia at the time blood was collected for parasite cultivation. three isolates of small babesia parasites were cultured from different sample groups of bighorn sheep, and 2 isolates of ... | 1993 | 8437062 |
| 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 |
| population subdivision among desert bighorn sheep (ovis canadensis) ewes revealed by mitochondrial dna analysis. | we used behavioural observations and mitochondrial dna (mtdna) sequence analysis to examine demographic and genetic structure within and among home-range groups of desert bighorn sheep (ovis canadensis) ewes in the peninsular ranges of southern california, usa. we identified substantial genetic variation in the first 515 bp of the mtdna control region and determined that seven haplotypes were distributed in a nonrandom fashion among these ewe subpopulations. although a significant (p < 0.01) amo ... | 1999 | 9919700 |
| desert bighorn sheep mortality due to presumptive type c botulism in california. | during a routine telemetry flight of the mojave desert (california, usa) in august 1995, mortality signals were detected from two of 12 radio-collared female desert bighorn sheep (ovis canadensis) in the vicinity of old dad peak in san bernardino county (california). a series of field investigations determined that at least 45 bighorn sheep had died near two artificial water catchments (guzzlers), including 13 bighorn sheep which had presumably drowned in a guzzler tank. samples from water conta ... | 2000 | 10682765 |
| new ruminant hosts and wider geographic range identified for babesia odocoilei (emerson and wright 1970). | babesia odocoilei was found to infect two previously unknown host species, desert bighorn sheep (ovis canadensis nelsoni) and musk oxen (ovibos moschatus), both of which are members of the family bovidae. previously, b. odocoilei has been reported in only cervidae hosts. new geographic regions where b. odocoilei infections have not been reported previously include pennsylvania and new york, where fatal babesiosis has occurred in reindeer (rangifer tarandus tarandus); new hampshire, where elk (ce ... | 2005 | 16456156 |
| an ecologic study comparing distribution of pasteurella trehalosi and mannheimia haemolytica between sierra nevada bighorn sheep, white mountain bighorn sheep, and domestic sheep. | the prevalence and phenotypic variability of pasteurella and mannheimia isolates from sierra nevada bighorn sheep (ovis canadensis sierrae), white mountain bighorn sheep (ovis canadensis nelsoni), and domestic sheep (ovis aries) from california, usa, were compared. the white mountain bighorn sheep population had a recent history of pneumonia-associated mortality, whereas the sierra nevada bighorn sheep population had no recent history of pneumonia-associated mortality. the domestic sheep flocks ... | 2009 | 19901369 |