Comparison of footbathing and vaccination to control ovine footrot in an experimentally infected flock          下载免费PDF全文

MB Allworth  JR Egerton 《Australian veterinary journal》2018,96(10):395-399

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Fertility of dairy cows in Northern Ireland     

Mayne CS  McCoy MA  Lennox SD  Mackey DR  Verner M  Catney DC  McCaughey WJ  Wylie AR  Kennedy BW  Gordon FJ 《The Veterinary record》2002,150(23):707-713

A comprehensive database was established on the milk production and reproductive performance of dairy cows in 19 selected herds in Northern Ireland, varying in size, management system and genetic merit. Data were obtained for 2471 cows, 1775 of which calved in a second year, and 693 were culled from the herd for specific reasons. The estimated mean rate of heat detection (assessed by the interheat interval during the main breeding season) in all the herds was 71 per cent, with a range from 53 to 92 per cent The average conception rate to first insemination was 37.1 per cent (range 21 to 66 per cent). The average calving interval for the retained cows was 407.2 days (range 359 to 448 days). Twenty-eight per cent of the cows that calved were culled, with infertility being the largest single reason (26.8 per cent of the cows culled). There were major differences in reproductive performance between the herds, but heat detection rate, conception rate and calving interval did not appear to be affeded by a herd's genetic merit. The herds with shorter calving intervals were characterised by better heat detection efficiency (83 v 61 per cent, P<0.01), a shorter interval from calving to first insemination (74 v 97 days; P<0.05), a higher conception rate to first insemination (45 v 34 per cent, P>0.10) and a lower removal rate (23 v 37 per cent, P<0.01). Furthermore, the cows in these herds had lower body condition scores (BCS) in the dry period (3.0 v 3.3; P<0.05) but lost less body condition in early lactation (0.3 v 0.6 BCS units, P<0.05). These results show that dairy herd fertility in Northern Ireland is generally low and similar to that previously reported for England and the USA, but that in some herds changes in herd management practices improved the cows' fertility.  相似文献   

Dysgenesis of the tubal system in an infertile mare karyotype 63,X:64,XY:65,XXY     

C.R.E. Halnan MA  Vet MB  PhD  FRCVS  C.F.P. Irwin BVSc  MACVSc 《Journal of Equine Veterinary Science》1985,5(6):328-329

A Thoroughbred mare, barren during three years at stud, unresponsive to therapy, and not palpably abnormal anatomically was found to have hypoplasia of the uterine tubes after excision at laparotomy. The cause was an unbalanced genotype. The mosaic karyotype, determined on a blood sample, was indispensible in diagnosis and the case extends the potential for cytogenetic prognostic procedures.  相似文献   

OSTEOCHONDROSIS IN THE LATERAL FEMORAL CONDYLES OF A HORSE     

JONATHAN L. STOWATER  DVM  MS  CARL A. KIRKER-HEAD  MA  VET MB  MRCVS  RICHARD M. JAKOWSKI  DVM  PHD 《Veterinary radiology & ultrasound》1986,27(4):115-117

Osteochondrosis of the lateral femoral condyles was diagnosed radiographically in an 8-month-old, female Arabian horse, which had been presented with a hindlimb lameness. The diagnosis was confirmed by gross and microscopic pathology. The location of the lesions was considered unusual for osteochondrosis in the horse.  相似文献   

Changes in protein synthesis during drought conditioning in roots of jack pine seedlings (Pinus banksiana Lamb.)     

Mayne MB  Subramanian M  Blake TJ  Coleman JR  Blumwald E 《Tree physiology》1994,14(5):509-519

The impact of drought conditioning on the ability of eight-week-old jack pine (Pinus banksiana Lamb.) seedlings to withstand drought was assessed. Two progressive cycles of drought conditioning significantly increased the survival of seedlings subjected to a subsequent prolonged drought. The in vivo accumulation of several root membrane proteins during drought conditioning was correlated with an increase in seedling survival. A group of root proteins, ranging in molecular mass from 43 to 47 kDa, increased accumulation during one cycle of drought conditioning and to a lesser extent during two cycles of drought conditioning. The accumulation of several low molecular mass membrane and soluble proteins also increased during drought conditioning, suggesting that these proteins may play an important role in the enhancement of drought tolerance. In vitro translation studies showed a general increase in the abundance of protein products encoded by mRNAs from drought-conditioned seedlings. Although the majority of the in vitro translation products appeared in both control and drought-conditioned seedlings, one mRNA encoding a 15 kDA translated protein was more prominent during the second cycle of drought conditioning.  相似文献   

Differential response to drought and abscisic acid of two cDNAs corresponding to genes expressed during drought conditioning in jack pine seedlings   总被引：1，自引：0，他引：1  

Mayne  Michael B.  Coleman  John R.  Blumwald  Edurado 《New Forests》1997,13(1-3):165-176

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Stereotactic Radiosurgery and Fracture Fixation in 6 Dogs With Appendicular Osteosarcoma     

Jennifer L. Covey DVM  Diplomate ACVS  James P. Farese DVM  Diplomate ACVS  Nicholas J. Bacon Vet MB  Diplomate ACVS & ECVS  Pierre Amsellem DVM  Diplomate ACVS  Ryan P. Cavanaugh DVM  Diplomate ACVS  Rowan J. Milner BVSc  MMed Vet  Diplomate ACVIM 《Veterinary surgery : VS》2014,43(2):174-181

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Effect of an Intervertebral Disk Spacer on Stiffness After Monocortical Screw/Polymethylmethacrylate Fixation in Simulated and Cadaveric Canine Cervical Vertebral Columns     

Bianca F. Hettlich Dr Med Vet  Diplomate ACVS  Matthew J. Allen Vet MB  PhD  Gabriela S. Glucksman BS  Geoffrey T. Fosgate DVM  PhD  Diplomate ACVPM  Alan S. Litsky MD  ScD 《Veterinary surgery : VS》2014,43(8):988-994

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Recombinant Bone Morphogenetic Proteins: Novel Substances for Enhancing Bone Healing   总被引：1，自引：0，他引：1  

CARL A. KIRKER-HEAD MA  Vel MB  MRCVS  Diplomate ACVS  Diplomate ECVS 《Veterinary surgery : VS》1995,24(5):408-419

Bone morphogenetic proteins (BMPs) are differentiative factors whose principal function is to induce transformation of undifferentiated mesenchymal cells into chondroblasts and osteoblasts in a dose-dependent manner. Bone morphogenetic proteins have been isolated postnatally in mammals from bone matrix, periosteal cells, mesenchymal cells of marrow stroma, tooth anlagen, and cells of osteosarcoma and chondrosarcoma. Distribution in additional embryonic tissues implies a broader organogenic function. Bone morphogenetic proteins are the only differentiative factors able to singularly induce de novo bone formation in vitro and in vivo. Recombinant DNA technology allows their production in large and highly purified quantities. The BMPs' osteoinductive ability has been shown with a variety of carriers including collagens and polymers at heterotopic and orthotopic sites in a wide range of species. They are presently being readied for clinical use as alternatives to bone grafts. Other potential applications include use as pulp capping agents, promoters of implant osteointegration and soft tissue reunion with bone, treatments for nonadaptive bone disease, and implants for use with mitotically expanded skeletal stem cell populations. Errors in the genetic coding of BMPs may manifest as clinical disease entities.  相似文献   

Prediction of nitrogen excretion in feces and urine of beef cattle offered diets containing grass silage     

Yan T  Frost JP  Keady TW  Agnew RE  Mayne CS 《Journal of animal science》2007,85(8):1982-1989

Data from 286 beef cattle, obtained in total diet digestibility assessments, were used to examine effects of dietary and animal factors on N excretion in feces and urine and to develop prediction equations for N excretion in beef cattle. The animals used were mainly from beef breeds, at various ages (from growth to finishing) and live BW (153 to 580 kg), and offered diets containing grass silage at production feeding levels. Dietary forage proportion ranged from 199 to 1,000 g/kg of DM and dietary CP concentration from 108 to 217 g/kg of DM. Linear and multiple regression techniques were used to examine relationships between the efficiency of N utilization and dietary and animal variables with the experimental effects removed. The statistical analysis indicated that N excretion was related positively (P < 0.001) to live BW and intakes of DM, N, and ME, and negatively (P < 0.001) to dietary forage proportion. The prediction equation for N excretion, developed using N intake alone, produced a large r2 (0.898) and a small SE (12.3). Addition of live BW and forage proportion as supporting predictors to this relationship only marginally increased R2 to 0.915 and reduced SE to 11.2. Nitrogen excretion was less well related to live BW (r2 = 0.771, SE = 18.5) than to N intake. Addition of N intake as a proportion of DMI or ME intake to the relationship between live BW and N excretion increased R2 to 0.824 and reduced SE to 16.2. The internal validation of these equations revealed that using N intake as the primary predictor produced a very accurate prediction of N excretion. In situations where data on N intake are not available, prediction equations based on live BW and dietary N concentration together can produce a relatively accurate assessment of N excretion. A number of mitigation strategies to reduce N excretion in feces and urine in beef cattle are discussed, including manipulation of dietary N concentration, diet quality, and level of feeding. The prediction equations and mitigation strategies developed in the current study provide an approach for beef producers to quantify N excretion against production and to develop their own mitigation strategies to reduce N excretion.  相似文献