Population subdivision among bighorn sheep (Ovis canadensis) ewes revealed by mitochondrial DNA analysis

September 17, 1999

Boyce WM, Ramey RR, Rodwell TC, Rubin ES, Singer RS Molecular Ecology 8:99-106 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…

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A bovine model of vaccine enhanced respiratory syncytial virus pathophysiology

September 17, 1998

Gershwin LJ, Schelegle ES, Gunther RA, Anderson ML, Woolums AR, Larochelle DR, Boyle GA, Friebertshauser KE, Singer RS Vaccine 16:1225-1236 A critical issue has been the observation that vaccination of children with a formalin-inactivated respiratory syncytial virus (RSV) vaccine is associated with disease enhancement. We have taken advantage of bovine RSV and our experience with…

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Evaluation of bluetongue virus diagnostic tests in free-ranging bighorn sheep

September 17, 1998

Singer RS, Boyce WM, Gardner IA, Johnson WO, Fisher AS Preventive Veterinary Medicine 35:265-282 Five bluetongue virus (BTV) diagnostic tests were evaluated for use in free-ranging bighorn sheep. We sampled one bighorn sheep population four times between 1989 and 1995. The tests evaluated included virus isolation (VI), polymerase-chain reaction (PCR), serum neutralization (SN), agar-gel immunodiffusion…

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Assessment of spatial and temporal antibiotic resistance of Pasteurella spp

September 17, 1998

Singer RS, Case JT, Carpenter TE, Walker RL, Hirsh DC Journal of the American Veterinary Medical Association 212:1001-1005 OBJECTIVE: To determine whether ampicillin- and tetracycline-resistant strains of Pasteurella multocida and P haemolytica isolated from California cattle with pneumonia were spatially and temporally clustered and to compare overall estimates of percentages of these isolates resistant to…

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Pathogen exposure patterns among sympatric populations of bighorn sheep, mule deer, and cattle

September 17, 1997

Singer RS, Jessup DA, Gardner IA, Boyce WM Journal of Wildlife Diseases 33:377-382 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…

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Dilemmas associated with rehousing homeless people who have companion animals

September 17, 1995

Singer RS, Hart LA, Zasloff RL Psychological Reports 77:851-857 66 individuals were given a questionnaire during the initial visit to a veterinary clinic for homeless pet owners. Among the 35 men and 31 women, 32 had been homeless for 6 mo. or less and were termed the acutely homeless subgroup, and 34 had been homeless…

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