The effect of vitamin a supplementation on seminal characteristics and vitamin a absorption in stallions     

S.L. Ralston VMD  PhD  G.A. Rich PhD  S. Jackson BS  E.L. Squires PhD 《Journal of Equine Veterinary Science》1986,6(4)

Fourteen mature stallions were paired based on age and pretreatment spermatozoal output. One member of each pair was assigned to either 1) control (3 ml corn oil) or 2) treated (132,000 IU retinyl palmitate in 3 ml corn oil) experimental groups. Treatments were added to oat rations every other day. Seminal characteristics (gel free volume, gel volume, total seminal volume, percent progressively motile spermatozoa, number of spermatozoa per ml, percentage morphologically normal spermatozoa and spermatozoal membrane stability) and total scrotal width of each stallion were recorded before (February) and after three months of vitamin A supplementation (June). Plasma vitamin A was measured at 0,6,12,24, and 48 hours following the first and last treatments to document absorption. There were no treatment effects (p>.05) on seminal characteristics or scrotal width. Seasonal increases were recorded in gel-free volume, total seminal volume, percent spermatozoal motility, total spermatozoal output, percentage of morphologically normal spermatozoa, and total scrotal width. Plasma vitamin A was lower during the second collection period (June) than the first (February) in both treatment groups. Peak plasma vitamin A was observed 48 hours following ingestion of the first dose of the vitamin but at 12 hours following the last treatment.  相似文献   

Book Review: Small animal emergency and critical care manual for the veterinary technician     

Christine Kiernan BS  RVT  VTS 《Veterinary anaesthesia and analgesia》2001,28(4):225-225

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SEPTIC COXOFEMORAL ARTHRITIS AND OSTEOMYELITIS IN A DOG     

Lyndell  Levitt  BS  DVM  J. David  Fowler  BS  DVM  MVSc 《Veterinary radiology & ultrasound》1988,29(3):129-132

An 8-year-old male Labrador retriever presented with a rear limb lameness cased by an osteolytic lesion of the left acetabulum and femoral head and neck. Initial bone biopsy study was nondiagnostic. Histopathologic study and culture of the subsequently excised femoral head and neck revealed a Staphyloccocus intermedial arthritis and osteomyelitis. Neoplash was ruled out on the basis of histopathologic analysis.  相似文献   

A review of calcium, phosphorus and magnesium metabolism in the horse     

V.B. Meacham BS 《Journal of Equine Veterinary Science》1984,4(5):210-214

Mineral metabolism in the equine is a complex process involving absorption sites and interactions between the minerals themselves and other compounds. Factors such as the digestibility of the minerals and the extent of the interactions all play an important role in the mineral amounts required in the diet.Inadequate levels of minerals in the diet can lead to physiological maladies such as HNS and Ricketts. A knowledge and understanding of mineral metabolism is essential to the success of equine management.  相似文献   

Withdrawal period for Ovitelmin S&C     

Jones E 《The Veterinary record》2005,156(1):28

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Isolation of Feline Herpesvirus 1 from the Trigeminal Ganglia of Acutely and Chronically Infected Cats     

Mark P. Nasisse DVM    Barbara J. Davis VMD    James S. Guy DVM  PhD    Michael G. Davidson DVM  Wendy Sussman BS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1992,6(2):102-103

Feline herpesvirus 1 (FHV-1) is one of the most common viral infections of domestic cats worldwide, estimated to cause 50% of all respiratory infections in this species. Feline herpesvirus 1 is also an important ocular pathogen of cats, causing conjunctivitis, epithelial and stromal keratitis, symblepharon formation, keratocon-junctivitis sicca, and corneal sequestration. Despite the importance of this viral disease, major questions remain unanswered concerning the pathogenesis of its most important manifestation, the recrudescent infection. Although the taxonomic classification of FHV-1 as an alpha herpesvirus implies the ability of FHV-1 to establish neural latency, attempts at recovering the virus from the trigeminal ganglia of latently infected cats have typically yielded negative results. This failure has stimulated speculation that neural tissue is not an important site for latent FHV-1. However, in the most successful of such studies, FHV-1 was isolated from the trigeminal ganglia of 3 of 17 cats using an explant technique. In the present study, we describe the successful isolation of FHV-1 from the trigeminal ganglia of cats using a similar tissue culture method.  相似文献   

Comparison of the properties of hyaluronate products used in treatment of joint dysfunction in horses     

Sandra A. Loftus BA  Jill M. Montplaisir BS  Jing-wen Kuo MS  Dale P. DeVore PhD   《Journal of Equine Veterinary Science》1988,8(2)

A standardized investigation was conducted to compare the biophysical properties of hyaluronate products used in the treatment of joint dysfunction in horses. Results showed that two of the five products, Hyvisc® and Hylartin®V, contained higher-weight molecular hyaluronate (greater than 1.5×10⁶). Other investigations have shown that higher molecular weight hyaluronate is effective in providing physical resistance to shear, in stimulating endogenous hyaluronate synthesis, and in inhibiting excess cell proliferation which may be associated with synovial pannus formation. It is suggested that the therapeutic benefits of hyaluronate products may be dependent on the molecular size of the hyaluronate molecules. Higher molecular weight hyaluronate products would be expected to be more effective than lower molecular hyaluronate products in providing therapeutic benefits.  相似文献   

Growth and feed utilization by yearling horses fed added dietary fat     

B.D. Scott BS MS  G.D. Potter PhD  J.W. Evans PhD  J.C. Reagor PhD  G.W. Webb PhD  S.P. Webb MS 《Journal of Equine Veterinary Science》1989,9(4)

Twenty-four yearlings were used to evaluate the efficacy of feeding feed-grade fat to growing horses. All horses were started on trial at 13-months-of-age and were fed for 112 days. The experimental diets, containing similar nutrient-to-calorie ratios, were: 1) control (no added fat; 2) 5% added fat and; 3) 10% added fat. There was a trend for yearlings fed the 10% added fat diet to grow faster and eat less feed than those on the control diet. Data from this study indicate that feed-grade fat can be safely fed to growing horses. Feeding fat to yearlings stimulated growth and efficiency of feed utilization initially, but these effects were not maintained as the yearlings grew toward maturity.  相似文献   

Gas Exchange during Xylazine–ketamine Anesthesia in Neonatal Calves     

C. A. BLAZE BVSC  DipiomateACVA    R. E. HOLLAND DVM  MS  A. L. GRANT BS 《Veterinary surgery : VS》1988,17(3):155-159

Ten neonatal calves were anesthetized with xylazine and ketamine intramuscularly and breathed air spontaneously. Drug injection was repeated after 45 minutes. Each injection resulted in a rapid and sustained increase in respiratory rate, but arterial carbon dioxide tension (PaCO2) increased, indicating hypoventilation. Arterial hypoxemia, primarily caused by hypoventilation, developed within 15 minutes of each injection, but gradually disappeared. Acidemia was primarily respiratory in origin. Heart rate and arterial blood pressure decreased for the duration of anesthesia (90 minutes). This form of anesthesia is a satisfactory alternative to inhalation anesthesia of neonatal calves.  相似文献   

Calcospherite-like bodies and caseous necrosis in tracheal mucus from a dog with tuberculosis     

Bauer NB  O'Neill E  Sheahan BJ  Cassidy J  McAllister H 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2004,33(3):168-172

A 3-year-old Wirehaired Fox Terrier was presented to the University Veterinary Hospital, University College Dublin, for evaluation of chronic cough of 8-months duration. Bronchoscopy showed a severely dilated collapsed left principal bronchus filled with highly viscous white mucus. Cytologically, globular lipid-like material and round concentrically laminated crystalline structures were evident within the proteinaceous mucus. These findings resembled the calcospherites and granular caseous debris often observed in human tuberculous patients. A Ziehl-Neelsen-stained cytocentrifuged preparation of material obtained by bronchoalveolar lavage revealed a few acid-fast rods within macrophages, suggestive of tuberculosis. At necropsy, granulomas with caseous necrosis were present in the lung parenchyma, bronchial and mediastinal lymph nodes, liver, pancreas, and mesentery. Granulomas were adherent to both kidney capsules and to the diaphragm. Histologically, there was evidence of mild calcification within caseous granulomas, which was confirmed by von Kossa's stain. Using Ziehl-Neelsen stain, acid-fast rods were identified within granulomas; bacterial culture was positive for Mycobacterium bovis. The cytologic findings in this case have not been reported previously in dogs and demonstrate a possible correlation between tuberculosis and calcospherite-like bodies with caseous, globular material in bronchial mucus, similar to that described in human patients.  相似文献