Individual and group antimicrobial usage rates on 34 farrow-to-finish swine farms in Ontario, Canada     

R.H Dunlop  S.A McEwen  A.H Meek  W.D Black  R.C Clarke  R.M Friendship 《Preventive veterinary medicine》1998,34(4):1601-264

Antimicrobial drug-use was assessed on 34 farrow-to-finish operations that marketed at least 500 hogs/yr. These operations either did not use any antimicrobials or used narrow-spectrum or broad-spectrum antimicrobials in rations of post-weaning pigs. Total antimicrobial use was measured for two months after obtaining inventories and records of all antimicrobials used. The collection of empty medication bottles and inventories of drugs on hand was convenient for producers and useful for estimating or validating recorded treatment rates, particularly for antimicrobials that were used only in one class of pig. Treatment records, however, underestimated by approximately 35% the amounts used for 27/29 farm–antimicrobial combinations. Rates of individual-pig treatment varied from 0–24.1 pigs treated/1000 pig-days, with a median of 5.29. Most individual animal treatments were given to piglets and sows at parturition and penicillin was the most commonly used antimicrobial. Gentamicin was administered to suckling piglets on 19 of the farms.  相似文献   

Atrioventricular valve dysplasia in Dalmatians   总被引：1，自引：0，他引：1  

RB ATWELL  RH SUTTON 《Australian veterinary journal》1998,76(4):249-249

  相似文献   

Factor VII deficiency in an Alaskan Malamute     

JN MILLS  RH LABUC  MJ LAWLEY 《Australian veterinary journal》1997,75(5):320-322

  相似文献   

Anesthesia for patients with preexisting pneumonia and cyanosis.     

C I Dunlop 《Veterinary Clinics of North America: Small Animal Practice》1992,22(2):454-455

  相似文献   

Volvulus of the colon in a horse associated with a mesocolic-umbilical band     

TD MOGG †  S. GROENENDYK  RH SUTTON ‡ 《Australian veterinary journal》1992,69(1):11-12

A 7-years-old Clydesdale mare was presented with severe abdominal distension and acute colic. Dilated large intestine was palpated per rectum and a ventral midline exploratory laparotomy was performed. A 180 degrees volvulus of the pelvic flexure was present, associated with an inelastic band of tissue connecting the mesocolon to the umbilicus. The band was ligated and transected, and the volvulus reduced. Postoperative complications included hyponatraemia, metabolic acidosis and laminitis. The possible aetiology of the mesocolic-umbilical band is discussed.  相似文献   

Composition and dynamics of plasma in Saturn's magnetosphere     

Young DT  Berthelier JJ  Blanc M  Burch JL  Bolton S  Coates AJ  Crary FJ  Goldstein R  Grande M  Hill TW  Johnson RE  Baragiola RA  Kelha V  McComas DJ  Mursula K  Sittler EC  Svenes KR  Szegö K  Tanskanen P  Thomsen MF  Bakshi S  Barraclough BL  Bebesi Z  Delapp D  Dunlop MW  Gosling JT  Furman JD  Gilbert LK  Glenn D  Holmlund C  Illiano JM  Lewis GR  Linder DR  Maurice S  McAndrews HJ  Narheim BT  Pallier E  Reisenfeld D  Rymer AM  Smith HT  Tokar RL  Vilppola J  Zinsmeyer C 《Science (New York, N.Y.)》2005,307(5713):1262-1266

During Cassini's initial orbit, we observed a dynamic magnetosphere composed primarily of a complex mixture of water-derived atomic and molecular ions. We have identified four distinct regions characterized by differences in both bulk plasma properties and ion composition. Protons are the dominant species outside about 9 RS (where RS is the radial distance from the center of Saturn), whereas inside, the plasma consists primarily of a corotating comet-like mix of water-derived ions with approximately 3% N+. Over the A and B rings, we found an ionosphere in which O2+ and O+ are dominant, which suggests the possible existence of a layer of O2 gas similar to the atmospheres of Europa and Ganymede.  相似文献   

Determination of serum biochemistry reference intervals in a large sample of adult greyhounds     

Dunlop MM  Sanchez-Vazquez MJ  Freeman KP  Gibson G  Sacchini F  Lewis F 《The Journal of small animal practice》2011,52(1):4-10

Background : As large breed, highly muscled dogs, greyhounds are regarded as physiologically different to other breeds. Biochemistry reference intervals have previously been determined using small numbers of greyhounds or based on the observations from racing dogs. Objectives : The purpose of this study was to develop statistically defined reference intervals for biochemical analytes in healthy non‐racing greyhounds. Partitioning according to gender was also examined. Methods : Biochemical analytes from a population of non‐racing healthy greyhounds, including 269 males, 202 females and 28 dogs where gender had not been recorded, were examined using a non‐parametric statistical approach. The dogs were aged between one and nine years old. Results : Total protein, albumin, globulin and creatinine reference intervals differed from generic reference intervals used for dogs. The reference intervals for greyhounds in this study are similar to those obtained by other studies of greyhounds, but often had a narrower range of values, likely reflecting more accurate estimation associated with larger numbers of reference individuals. Recommended methods for assessment of partitioning do not indicate a need to partition according to gender.  相似文献   

Magnetic properties of hydrothermally recrystallized magnetite crystals     

Heider F  Dunlop DJ  Sugiura N 《Science (New York, N.Y.)》1987,236(4806):1287-1290

The discrepancy between the magnetic hysteresis properties of magnetite crystals that are precipitated from solution (<0.3 micrometer) and of crushed sifted grains (>0.3 micrometer) is not an inherent property of magnetite but is caused by the highly stressed state of crushed material and by adhering finer fragments. The size trends of magnetic properties exhibited by submicrometer-size precipitated grains continue in the size range from 1 micrometer to 1 millimeter in a set of hydrothermally recrystallized magnetite crystals. Coercive forces of these narrowly sized crystals follow a power law over a wide size range (0.1 micrometer to 1 millimeter) as predicted by theory. Dislocation etch pits show similar dislocation densities for hydrothermally grown (3 x 10(10) meter (-2)) and natural (1 x 10(10) meter(-2)) magnetite crystals. Hysteresis parameters of hydrothermally grown crystals are similar to those of natural crystals but are about one-fifth of those for crushed grains.  相似文献   

ENHANCING NITROGEN USE EFFICIENCY OF POTATO AND CEREAL CROPS BY OPTIMIZING TEMPERATURE,MOISTURE, BALANCED NUTRIENTS AND OXYGEN BIOAVAILABILITY     

Guodong Liu  Yuncong Li  Ashok K. Alva  David M. Porterfield  James Dunlop 《Journal of plant nutrition》2013,36(3):428-441

Enhancement of nutrient use efficiency is imperative for increasing economic returns and reducing environmental pollution caused by fertilizer use in crop production systems. In this paper, we have demonstrated at a given soil temperature and nitrogen (N) rate, N loss via ammonia emission at 80% field capacity (FC) soil water regime in potato production was decreased by 58 to 81% compared to that at 20% FC, in two soils. In another study, N uptake by flooded corn (genotype: FR27 × FRMO17) seedlings with oxygen fertilization was 8-fold greater than that without oxygen fertilization. Nitrogen utilization efficiency of wheat (cv. ‘Yanzhong 144’) seedlings grown in a complete nutrient solution was 10-fold greater than that of the seedlings under low-phosphorus stress. It is concluded that appropriate management of soil water, oxygen fertilization, and of well-balanced nutrients supply significantly enhance N uptake and utilization efficiencies of corn and wheat, and minimize N loss.  相似文献   

Liquorice and canine Addison's disease     

RH Jarrett  EJ Norman  RA Squires 《New Zealand veterinary journal》2013,61(3)

Abstract

Extract

Hypoadrenocorticism, or Addison's disease, is an uncommon en-docrinopathy of dogs (Feldman and Nelson 2004 Feldman, EC and Nelson, RW. 2004. “Hypoadrenocorticism (Addison's disease)”. In Canine and Feline Endocrinology and Reproduction, 3rd, 394–439. Philadelphia, , USA: WB Saunders.  [Google Scholar]). Long-term management of affected dogs in New Zealand involves treatment with oral fludrocortisone acetate (Florinef tablets; Bristol-Myers Squibb (NZ) Ltd, Auckland, NZ), which is a relatively expensive synthetic adrenocortical steroid. Table salt may be added to the food, in an attempt to reduce the amount of fludrocortisone required. Despite fludrocortisone therapy, many Addisonian dogs remain hyponatraemic and hyperkalaemic and the required dose of fludrocortisone may need to be increased during the first year of treatment. Increasing the dose of fludrocortisone is not only expensive, but may also have undesirable effects through its potent glucocorticoid action.  相似文献