Trenbolone acetate/estradiol combinations in feedlot steers: dose-response and implant carrier effects.     

S J Bartle  R L Preston  R E Brown  R J Grant 《Journal of animal science》1992,70(5):1326-1332

Two experiments were conducted at three locations to determine the correct dosage and carrier for trenbolone acetate (TBA) and estradiol (E2) implants in feedlot steers. In the dose-response experiment, 1,296 steers were allotted to six implant treatments (48 pens per location): control, 140 mg of TBA (140/0), 30 mg of E2 (0/30), 20 mg of TBA + 4 mg of E2(20/4), 80 mg of TBA + 16 mg of E2(80/16), and 140 mg of TBA + 28 mg of E2 (140/28). In the carrier experiment, 575 steers were allotted to five implant treatments (25 pens per location): control, 140 mg of TBA + 28 mg of E2 in lactose (140/28-LA), 140 mg of TBA + 28 mg of E2 in cholesterol (140/28-CH), 140 mg of TBA + 20 mg of E2 in LA (140/20-LA), and 200 mg of progesterone + 20 mg of E2 benzoate (SS, reimplanted). In both experiments steers were fed a finishing diet for 140 to 168 d. In the dose-response experiment, response to TBA alone (140/0) did not differ from control (P greater than .2). Estradiol alone (0/30) improved ADG by 7% (P less than .01) and tended to improve feed efficiency over control (3%, P = .17). The highest dosage (140/28) improved ADG by 18% (P less than .001) and feed efficiency by 10% (P less than .001) over control and 10% (P less than .001) and 7% (P less than .01) over E2 alone, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

The effects of a compressible plastic shoe - The Seattle shoe®- on the kinematics of the strides of galloping thoroughbred horses     

Patrick D. Wilson MS  DVM  Marc H. Ratzlaff DVM  PhD  Barrie D. Grant DVM  MS  Martha L. Hyde PhD  Olin K. Balch DVM  MS 《Journal of Equine Veterinary Science》1992,12(6):374-381

  相似文献   

Levels of selenium in blood and tissues associated with some selenium deficiency diseases in New Zealand sheep     

Sheppard AD  Blom L  Grant AB 《New Zealand veterinary journal》1984,32(6):91-95

Whole bloods from weaned lambs with severe selenium responsive unthriftiness usually contain <5 ng Se/ml. Mildly or moderately affected lambs have blood levels of 5-10 ng/ml. Selenium responsive infertility in ewes appears to be associated with whole blood selenium levels below 10 ng/ml.  相似文献   

Abnormal bone mineralization in a puppy fed an imbalanced raw meat homemade diet diagnosed and monitored using dual-energy X-ray absorptiometry     

Sarah Dodd  Maureen Barry  Caitlin Grant  Adronie Verbrugghe 《Journal of animal physiology and animal nutrition》2021,105(Z2):29-36

A 4-month-old male Old English Sheepdog was presented for evaluation of a raw meat-based homemade diet after a 1-month history of progressive lameness. Marked dietary deficiencies were detected, which included calcium, phosphorus and vitamin D. Hypovitaminosis D and hypocalcaemia were diagnosed by serum analysis. Evidence of severe diffuse osteopenia was noted on survey radiographs. Dual-energy X-ray absorptiometry (DEXA) was used to quantify bone mineral content and density and compare to published reference ranges. The puppy's initial bone mineralization was markedly subnormal, with bone mineral density 66% lower than expected, and bone mineral content 40% lower than expected. Subsequent DEXA scans were performed at intervals during the puppy's recovery to document the rate of bone re-mineralization and guide therapeutic recommendations. Marked improvement was achieved within 4 months through exercise control and feeding of a diet appropriately formulated for large breed puppy growth and development. This report reinforces the necessity of thorough dietary history and highlights the potential for malnutrition in pets fed homemade and raw meat-based diets. Use of DEXA has rarely been reported in clinical cases, yet can be a valuable tool for diagnosing and monitoring cases with abnormal bone mineralization. Further studies using DEXA to track bone mineralization in healthy puppies are encouraged to develop a more robust reference range of bone mineralization in growing dogs of varying sizes, weights and ages.  相似文献   

Spontaneous Course of Biliary Sludge Over 12 Months in Dogs with Ultrasonographically Identified Biliary Sludge          下载免费PDF全文

S.M. DeMonaco  D.C. Grant  M.M. Larson  D.L. Panciera  M.S. Leib 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2016,30(3):771-778

  相似文献   

Myxoma virus in the European rabbit: interactions between the virus and its susceptible host     

Stanford MM  Werden SJ  McFadden G 《Veterinary research》2007,38(2):299-318

Myxoma virus (MV) is a poxvirus that evolved in Sylvilagus lagomorphs, and is the causative agent of myxomatosis in European rabbits (Oryctolagus cuniculus). This virus is not a natural pathogen of O. cuniculus, yet is able to subvert the host rabbit immune system defenses and cause a highly lethal systemic infection. The interaction of MV proteins and the rabbit immune system has been an ideal model to help elucidate host/poxvirus interactions, and has led to a greater understanding of how other poxvirus pathogens are able to cause disease in their respective hosts. This review will examine how MV causes myxomatosis, by examining a selection of the identified immunomodulatory proteins that this virus expresses to subvert the immune and inflammatory pathways of infected rabbit hosts.  相似文献   

Blueberries infected with the fungal pathogen Colletotrichum fioriniae release odors that repel Drosophila suzukii     

Caitlin C Rering  Amanda Quadrel  Pablo Urbaneja-Bernat  John J Beck  Yahel Ben-Zvi  Fatemeh Khodadadi  Srđan G Aćimović  Cesar Rodriguez-Saona 《Pest management science》2023,79(12):4906-4920

  相似文献   

Identification of genetic regions associated with black point in barley     

Priya R. Tah  A. Lehmensiek  Glen P. Fox  Emma Mace  Maria Sulman  Gary Bloustein  Grant E. Daggard 《Field Crops Research》2010,115(1):61-66

Black point (BP) can cause severe losses to the barley industry through downgrading and discounting of malting barley. The genetic improvement in BP resistance of barley is complex, requiring reliable screening tools, an understanding of genotype by environment interactions and an understanding of the biochemical mechanisms of melanisation involved in BP development. Thus the application of molecular markers for resistance to BP may be a useful tool for plant breeders. We have investigated the genetic regions associated with BP resistance in the barley F₂ population, Valier/Binalong. Quantitative trait loci (QTLs) contributed by the resistant parent Valier, were detected on chromosomes 2HS, 2HC, 3HL, 4HL and a QTL contributed by the susceptible parent, Binalong was detected on 5HL. Three of the four QTLs were detected in two distinctly different environments. The differences observed in BP resistance between these two environments and the implications for accelerated screening are discussed. Identified SSR markers in these regions may be useful for selecting black point resistance in related breeding materials.  相似文献   

Seroprevalence of leptospiral antibodies in the Jamaican livestock population     

G H Grant  G Smith  W Schloss 《The Veterinary record》1988,122(17):419-420

  相似文献   

Influence of age at weaning and kind and protein content of starter on rate and efficiency of gain of growing swine, and carcass characteristics     

R J Mead  W R Dukelow  R S Grant  K P Miller  H E Hanke  L E Hanson  L D Vermedahl  D F Wass 《Journal of animal science》1969,29(2):309-319

  相似文献