| wyominia tetoni (cestoda: thysanosomatinae) from bighorn sheep in washington. | in washington, eitht california bighorn sheep, ovis canadensis californiana, were necropsied to ascertain age and general physical condition. four were found to harbor wyominia tetoni. | 1975 | 1142552 |
| 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 |
| exposure to psoroptes sp. mites is common among bighorn sheep (ovis canadensis) populations in california. | sera (n = 806) from 50 populations of bighorn sheep (ovis canadensis) in california (usa) were evaluated for antibodies to psoroptes sp. mites using a kinetic enzyme-linked immunosorbent assay (elisa). test values for each sample were determined to be either positive or negative at each of two elisa cutoff values that provided either 100% sensitivity (low cutoff) or 100% specificity (high cutoff), respectively. one hundred sixty-eight (20.8%) sera were seropositive at the low cutoff value, and 8 ... | 1992 | 1474651 |
| 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 |
| fatal pneumonia of bighorn sheep following association with domestic sheep. | during 1979-1980 acute fibrinopurulent bronchopneumonia resulted in high mortality or total loss of herds of bighorn sheep (ovis canadensis) in california and washington. contact with domestic sheep occurred shortly before the onset of disease in each case. circumstantial evidence indicated that the apparently healthy domestic sheep transmitted pathogenic bacteria to the bighorns, resulting in mortality. pasteurella multocida and corynebacterium pyogenes were isolated from pulmonary tissue of de ... | 1982 | 7047767 |
| 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 |
| geographic analysis of pathogen exposure in bighorn sheep (ovis canadensis). | antibody responses were examined among 998 bighorn sheep (ovis canadensis) in california (usa) to determine spatial patterns of pathogen exposure. using a shifting frame analysis, a specific geographic region was delineated that contained bighorn sheep with higher (p < 0.05) levels of multiple exposure (antibodies detected against > or = two pathogens), as well as higher prevalence values for eight of ten individual pathogens. this region in southwestern california encompassed all of the peninsu ... | 1994 | 7933271 |
| 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 |
| a retrospective serologic survey for anaplasma spp. infection in three bighorn sheep (ovis canadensis) populations in california. | using an indirect immunofluorescence assay, we determined the prevalence of anaplasma-reactive antibody in three herds of bighorn sheep, each a different subspecies and occupying a different habitat in california (usa). antibodies to anaplasma spp. were identified in none of twenty california bighorn (ovis canadensis californiana) sampled from the mt. baxter herd, 11 of 17 peninsular bighorn (o. canadensis cremnobates) sampled in the santa rosa mountains, and all 20 desert bighorn (o. canadensis ... | 1993 | 8258852 |
| restriction endonuclease analysis of herpesviruses isolated from two peninsular bighorn sheep (ovis canadensis cremnobates). | in 1989, herpesviruses were isolated from nasal swabs taken from two peninsular bighorn sheep (ovis canadensis cremnobates) in the anza-borrego desert state park, san diego county, california (usa). using restriction endonuclease analysis (rea) with pst1 enzyme, each isolate was found to be similar to the cooper strain of infectious bovine rhinotracheitis virus (ibrv). the rea patterns of the two herpesviruses from bighorn sheep were typical of either field strains or vaccine strains of ibrv com ... | 1993 | 8383254 |
| 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 |
| seroprevalence of two babesia spp. isolates in selected bighorn sheep (ovis canadensis) and mule deer (odocoileus hemionus) populations in california. | sera from 111 bighorn sheep (ovis canadensis) and 95 mule deer (odocoileus hemionus) were tested using an indirect immunofluorescence assay for antibodies to two isolates of babesia spp. recently obtained from these hosts in california (usa). the study populations were from six locations: three areas of real or potential sympatry of bighorn sheep and deer, one area with deer only, and two areas with bighorn sheep only. antibody titers from seroreactive individuals were similar with both babesial ... | 1995 | 8592376 |
| 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 |
| pathogen exposure patterns among sympatric populations of bighorn sheep, mule deer and cattle. | we sampled sympatric bighorn sheep (ovis canadensis, n = 31), mule deer (odocoileus hemionus, n = 38), and domestic cattle (n = 26) in the san bernadino mountains of southern california (usa) for the presence of psoroptes spp. mites and for serologic evidence of exposure to bluetongue virus (btv) and babesia spp. from 1991 through 1994, psoroptes spp. infestations were found on 12 (44%) of 27 bighorn sheep. no mites were found on mule deer or cattle. the btv serum antibody prevalence in a cohort ... | 1997 | 9131583 |
| 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 |
| geographic distribution of the muscle-dwelling nematode parelaphostrongylus odocoilei in north america, using molecular identification of first-stage larvae. | molecular identification of dorsal-spined larvae (dsl) from fecal samples indicates that the protostrongylid parasite parelaphostrongylus odocoilei occupies a broader geographic range in western north america than has been previously reported. we analyzed 2,124 fecal samples at 29 locations from thinhorn sheep (ovis dalli dalli and o. d. stonei), bighorn sheep (ovis canadensis canadensis and o. c. californiana), mountain goats (oreamnos americanus), woodland caribou (rangifer tarandus caribou), ... | 2005 | 16108550 |
| 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 |
| the serologic prevalence of q fever (coxiella burnetii) complement-fixing antibodies in the peninsular bighorn sheep of southern california. | q fever is a rare illness in the southern california desert. during the past 34 years only 6 patients have been diagnosed with the disease at the eisenhower medical center, a referral center for much of the desert and surrounding mountains. in all but 2 instances, q fever was identified in patients who have been in contact with imported domestic sheep who are brought to the desert to graze and lamb in the fall and winter. the sheep are sent back to idaho, wyoming, and montana in the spring. with ... | 2006 | 16896140 |
| bighorn sheep, a new host record for parelaphostrongylus odocoilei (nematoda: protostrongylidae). | larval nematodes with a dorsal spine on the tail were recovered from fecal samples of california bighorn sheep (ovis canadensis californiana) in northeastern washington state, usa. the identity of these dorsal-spined larvae (dsl) was established by single-strand conformation polymorphism (sscp) analyses of a partial fragment of the first internal transcribed spacer of the ribosomal dna. the sscp profiles of individual dsl from bighorn sheep were compared with those of dsl of five protostrongylid ... | 2006 | 17255460 |
| 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 |
| reference intervals for mineral concentrations in whole blood and serum of bighorn sheep (ovis canadensis) in california. | whole blood and serum mineral concentrations were measured in diverse bighorn sheep (ovis canadensis) metapopulations in california, and 90% reference intervals were determined. while there were some statistical differences between median concentrations among the different metapopulations, detected values were generally in good agreement with concentrations reported for other bighorn sheep populations and with reference ranges widely accepted for domestic sheep (ovis aries). although median whol ... | 2012 | 22529120 |