TitleAbstractYear(sorted ascending)
ecology of bacillary hemoglobinuria. 196414126858
salmonella dublin as a cause of diarrhea and abortion in ewes. 19704918902
dermacentor variabilis (say) (acarina: ixodidae) established in southeastern washington and northern idaho. 19715157834
a study of reproduction, disease and physiological blood and serum values in idaho elk. 19734361504
effects of origin and environment on reproductive phenomena in rambouillet ewes. i. breeding season and ovulation. 19744836828
effects of origin and environment on reproductive phenomena in rambouillet ewes. ii. lamb production. 19744836829
survey of toxoplasma antibodies among sheep in western united states.a survey was conducted to determine the prevalence of toxoplasma antibodies among breeding ewes and among lambs slaughtered for food in western united states. each serum was tested by the indirect hemaglutination method, using microtiter technique. agglutination (greater than or equal to 2 +) at the 1:64 dilution was considered to be a positive reaction. of 2,164 ewes from 18 flocks tested in california, 523 (24%) were seropositive for toxoplasma gondii, with prevalence rates among flocks rangin ...1977604325
serologic survey of prevalence of ovine progressive pneumonia in idaho range sheep.blood samples from 2,310 mature sheep in 3 idaho range flocks were examined by agar gel immunodiffusion to determine the prevalence of ovine progressive pneumonia. the prevalence ranged from 58% for all ages combined in one flock to 90% of cull ewes in another flock. age-specific prevalence rates increased from 16% in yearlings to 83% in ewes greater than or equal to 7 years old. rambouillet sheep had a significantly (p less than 0.01) lower prevalence than sheep of 5 other breeds, whereas one-h ...1978218917
bacterial isolates associated with epididymitis in rams from idaho and eastern oregon flocks.testicles from 47 rams with palpable lesions of epididymitis were subjected to bacterial culture. of the testicles examined by culture technique, 49% were positive for bacterial growth. the 2 most frequent isolates were actinobacillus actinomycetemcomitans (23.4% of the testicular pairs) and brucella ovis (14.9% of the testicular pairs). heretofore a actinomycetem-comitans has not been reported as a cause of epididymitis in rams.1979453669
anaplasma ovis in idaho sheep.blood samples from 16 anaplasmosis complement-fixation (cf) positive sheep from a flock near cambridge, idaho, were inoculated into 3 intact sheep and 3 splenectomized calves. the 3 sheep became cf positive, and 2 developed parasitemia. none of the 3 calves had signs of anaplasmosis, but all became ill when they were subsequently challenge exposed with blood from known carriers of anaplasma marginale. after a 75-day observation period, blood from the recipient intact sheep was subinoculated into ...19817258767
analysis of the genomes of bluetongue viruses recovered from different states of the united states and at different times.the ribonucleic acid (rna) genomes of the original representatives of the four serotypes of bluetongue virus (btv) isolated from the united states (btv-10, btv-11, btv-13 and btv-17) have been analyzed by polyacrylamide gel electrophoresis. ten double-stranded rna species were resolved for each virus and categorized into the size classes of large (l segments #1-3), medium (m segments #4-6) and small (s segments #7-10). minor electrophoretic mobility differences were observed for the m5 and s10 r ...19826278927
genetic variation of bluetongue virus serotype 11 isolated from host (sheep) and vector (culicoides variipennis) at the same site.genetic relatedness of 2 strains of bluetongue virus (btv) serotype 11 that were isolated from the same geographic site--one from host (sheep) and the other from the vector culicoides variipennis during an enzootic of bluetongue at bruneau, idaho, in august 1973--was determined by comparing the oligonucleotide fingerprint analyses of the individual double-stranded rna segments of the genomes. it was observed that the 2 strains of btv-11 exhibit considerable differences in their genotypes, the pe ...19836307090
firm udder in periparturient ewes with lymphocytic accumulations, retrovirus infection, and milk unavailable at the teat.a condition of firm udders in periparturient ewes, with little or no milk available at the teat, was associated with negative bacterial cultures of mammary tissue, isolation of ovine progressive pneumonia virus from mammary tissue, lymphocytic accumulations in mammary tissue, especially around ducts, and antibody to ovine progressive pneumonia virus in sera. milk was present in the glands, but was not adequately transported through the duct system. the cull rate of ewes with this condition was r ...19853972701
psoroptes ovis (acarina: psoroptidae) in a rocky mountain bighorn sheep (ovis canadensis canadensis) in idaho. 19853841164
sheep-associated outbreak of q fever, idaho.between feb 1 and aug 31, 1984, an outbreak of 18 symptomatic cases of q fever occurred in idaho; these numbers represent an increase over the three cases reported in 1982 and the five reported in 1983. four of the patients in the outbreak required hospitalization for two to five weeks; there were no fatalities. eight of the cases had documented q fever hepatitis, and one had pneumonia. all 18 of the 1984 cases for whom information was available were epidemiologically linked to visiting or worki ...19873813754
identification of ovine adenovirus types five and six in an epizootic of respiratory tract disease in recently weaned lambs.eight hundred fourteen polypay-cross lambs, 32 to 35 days old, were housed in an isolation barn under semiconfinement conditions. the lambs were observed twice daily for clinical signs of respiratory tract disease. during the 8-week observation period, an epizootic of respiratory tract disease developed, in which the combined morbidity and mortality was approximately 13%. the overall mortality was 4.1%, of which 57.6% was attributable to pneumonia. pasteurella haemolytica was isolated from 11 (5 ...19873038805
prevalence and effect of subclinical ovine progressive pneumonia virus infection on ewe wool and lamb production.the prevalence of infection with ovine progressive pneumonia (opp) virus and its effects on ewe wool and lamb production were investigated in a flock of 2,976 ewes of 6 breed types (rambouillet, targhee, columbia, polypay, 1/4 cross finnsheep, and 1/2 cross finnsheep). prevalence of seropositivity was significantly (p less than or equal to 0.01) lower among rambouillet and targhee breeds (44 and 42%, respectively), intermediate in polypay, columbia, and 1/4 cross finnsheep (approximately 53%), a ...19902170310
variation amongst the neutralizing epitopes of bluetongue viruses isolated in the united states in 1979-1981.neutralizing epitopes present on field isolates of bluetongue virus (btv) serotypes 10, 11, 13 and 17 were evaluated with a panel of polyclonal and neutralizing monoclonal antibodies (mabs). a total of 91 field isolates were evaluated, including 15 isolates of btv-10, 29 isolates of btv-11, 26 isolates of btv-13, and 21 isolates of btv-17. the viruses were isolated from cattle, goats, sheep, elk and deer in idaho, louisiana, nebraska and, predominantly, california, in the years 1979, 1980 and 19 ...19921379766
bacteria isolated from nasal and tonsillar samples of clinically healthy rocky mountain bighorn and domestic sheep.nasal and tonsillar samples were collected from 14 free-ranging clinically healthy rocky mountain bighorn sheep (ovis canadensis canadensis) and 10 domestic sheep (ovis aries). we identified 194 bacterial isolates, including 101 from bighorn and 93 from domestic sheep. of these isolates, 115 were gram-positive and 79 were gram-negative. staphylococcus species were the most numerous gram-positive organisms and had a higher incidence in samples from domestic than from bighorn sheep. in contrast st ...19948151809
bluetongue disease and the molecular epidemiology of viruses from the western united states.prototype and field isolates of united states bluetongue viruses were evaluated for genetic heterogeneity by sequence analyses. prototype viruses btv 2, 10, 11, 13 and 17 from the united states, btv 10 vaccine virus, and field isolates of btv 10 and 17 from california were analyzed. gene segment 2 from btv 10 and 17 isolated in 1980-81 and 1990 was sequenced along with gene segment 9 from btv 10 isolates. the wisconsin package was used to analyze nucleotide sequences and to predict amino acid co ...19968800543
genetic and phenotypic parameters for dietary selection of mountain big sagebrush (artemisia tridentata nutt. ssp. vaseyana.the heritability of diet selection for mountain big sagebrush (artemisia tridentata nutt. ssp. vaseyana [rydb] beetle) by grazing sheep was estimated from fecal samples collected from 549 rambouillet ewes. fecal samples were collected in september and october during 1996 and 1997 from free-grazing ewes on intermountain sagebrush-bunchgrass rangelands at the u.s. sheep experiment station in idaho. the total number of fecal samples was 1,949. fecal samples were evaluated for composition of big sag ...200111219459
characterization of pasteurella multocida associated with pneumonia in bighorn sheep.pasteurella multocida is a highly diverse group of bacteria recognized as important pathogens. although p. multocida is not ordinarily associated with disease in rocky mountain bighorn sheep (ovis canadensis canadensis), numerous isolates were cultured in high numbers from free-ranging bighorn sheep in the hells canyon area of idaho, washington, and oregon (usa) during the winter of 1995-96. animals captured in hells canyon and held in captivity, and their offspring, also harbored p. multocida. ...200314567214
sharing of pasteurella spp. between free-ranging bighorn sheep and feral goats.pasteurella spp. were isolated from feral goats and free-ranging bighorn sheep (ovis canadensis canadensis) in the hells canyon national recreation area bordering idaho, oregon, and washington (usa). biovariant 1 pasteurella haemolytica organisms were isolated from one goat and one of two bighorn sheep found in close association. both isolates produced leukotoxin and had identical electrophoretic patterns of dna fragments following cutting with restriction endonuclease haeiii. similarly pasteure ...200314733287
selenium toxicity in sheep grazing reclaimed phosphate mining sites.phosphate mining operations in southeastern idaho have exposed selenium (se) that was originally sequestered in the subsurface. sheep grazing in these areas have died as a result of high se concentrations in forage and water. this study was designed to monitor the health status of sheep grazing in a natural environment with known elevated levels of se. a total of 72 columbia x suffolk sheep were divided into 3 treatment groups that included control (con), low selenium (lose) and high selenium (h ...200314640477
seven new ovine progressive pneumonia virus (oppv) field isolates from dubois idaho sheep comprise part of oppv clade ii based on surface envelope glycoprotein (su) new ovine progressive pneumonia virus (oppv) field isolates were derived from colostrum and milk of 10 naturally oppv-infected sheep from the us sheep experiment station in dubois, idaho, usa. sixteen sequences of the surface envelope glycoprotein (su) from these seven dubois oppv field isolates and su sequence from oppv wlc1 were obtained, aligned with published srlv su sequences, and analyzed using phylogenetic analysis using parsimony (paup). percent nucleotide identity in su was greate ...200415084404
a devastating outbreak of malignant catarrhal fever in a bison early 2003, an outbreak of malignant catarrhal fever (mcf) occurred in a bison feedlot in southern idaho. the outbreak resulted in a 51.2% (n = 825) mortality rate among bison, which had been exposed to sheep for 19 days. diagnosis was made by detection of ovine herpesvirus 2 (sheep-associated mcf virus) dna in tissues or peripheral blood by polymerase chain reaction (pcr), and by histological examination of tissue lesions. peak losses occurred between 41 and 55 days postmean exposure time (p ...200616566270
genetic characterization of anaplasma ovis strains from bighorn sheep in montana.wildlife reservoir species and genetic diversity of anaplasma ovis (rickettsiales: anaplasmataceae) have been poorly characterized. bighorn sheep (ovis canadensis), captured in montana from december 2004 to january 2005, were tested for antibodies to anaplasma spp.; the presence of a. ovis was determined by the characterization of major surface protein msp4 sequences. anaplasma antibodies were detected in 25/180 (14%) sampled bighorn sheep and a. ovis msp4 sequences were amplified by polymerase ...200616870861
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 ...200616896140
q fever in the southern california desert: epidemiology, clinical presentation and treatment.despite the absence of a natural reservoir for q fever in the desert of southern california, six cases have been identified during the past 32 years. during that period of time, two areas have been used by northern sheep ranchers from idaho and wyoming to import sheep to an area in the coachella valley through 1985. thereafter, because of housing development, the sheep area was moved to blythe along the colorado river. all but two of these patients probably acquired infection by coxiella burneti ...200616837704
emergence of a tetracycline-resistant campylobacter jejuni clone associated with outbreaks of ovine abortion in the united states.campylobacter infection is one of the major causes of ovine abortions worldwide. historically, campylobacter fetus subsp. fetus was the major cause of campylobacter-associated abortion in sheep; however, campylobacter jejuni is increasingly associated with sheep abortions. we examined the species distribution, genotypes, and antimicrobial susceptibilities of abortion-associated campylobacter isolates obtained from multiple lambing seasons on different farms in iowa, idaho, south dakota, and cali ...200818322054
tularemia in range sheep: an overlooked syndrome?abortion and death caused by francisella tularensis were well recognized in range flocks of domestic sheep in idaho, montana, and wyoming in the first 6 decades of the 20th century. the current report describes 4 episodes of tularemia in 3 range flocks in wyoming and south dakota in 1997 and 2007 (1 flock was affected twice). flock owners reported that ticks were unusually numerous and commonly present on sheep during outbreaks. tularemia presented as late-term abortions (3 episodes) or listless ...200818599860
ovine progressive pneumonia provirus levels are unaffected by the prion 171r allele in an idaho sheep flock.selective breeding of sheep for arginine (r) at prion gene (prnp) codon 171 confers resistance to classical scrapie. however, other effects of 171r selection are uncertain. ovine progressive pneumonia/maedi-visna virus (oppv) may infect up to 66% of a flock thus any affect of 171r selection on oppv susceptibility or disease progression could have major impact on the sheep industry. hypotheses that the prnp 171r allele is 1) associated with the presence of oppv provirus and 2) associated with hig ...200919284685
sodium chlorate reduces presence of escherichia coli in feces of lambs and ewes managed in shed-lambing systems.our objective was to establish doses of orally-administered naclo(3) that reduced presence of generic escherichia coli in intestines of ewes and neonatal lambs managed in a shed-lambing system. neonatal lambs (n = 32; age = 7.1 ± 1.2 d; bw = 6.8 ± 1.0 kg) and yearling ewes (n = 44; bw = 74.8 ± 5.6 kg) were used in 2 experiments. in both experiments, lambs and ewes were randomly assigned to 1 of 4 groups, and groups were randomly assigned to 1 of 4 treatments. in exp. 1, neonatal lambs were given ...201121803976
domestic sheep show average coxiella burnetii seropositivity generations after a sheep-associated human q fever outbreak and lack detectable shedding by placental, vaginal, and fecal routes.coxiella burnetii is a globally distributed zoonotic bacterial pathogen that causes abortions in ruminant livestock. in humans, an influenza-like illness results with the potential for hospitalization, chronic infection, abortion, and fatal endocarditis. ruminant livestock, particularly small ruminants, are hypothesized to be the primary transmission source to humans. a recent netherlands outbreak from 2007-2010 traced to dairy goats resulted in over 4,100 human cases with estimated costs of mor ...201729141023
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