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Topic:Veterinary Research

Veterinary research in horses encompasses the study of diseases, health management, and medical treatments specific to equine species. This field investigates various aspects of horse health, including infectious diseases, metabolic disorders, and musculoskeletal conditions. Researchers focus on understanding the pathophysiology of equine ailments, developing diagnostic tools, and evaluating therapeutic interventions. The study of horse health also involves examining preventive measures such as vaccination protocols and nutritional management to promote overall well-being. This page collects peer-reviewed research studies and scholarly articles that explore the diverse areas of veterinary science related to horses, providing insights into disease mechanisms, treatment strategies, and advancements in equine healthcare.
Survey on the distribution of ticks of domestic animals in the eastern zone of Ethiopia.
Tropical animal health and production    May 1, 1996   Volume 28, Issue 2 145-146 
Tafesse B.No abstract available
Strain-rate-dependent mechanical properties of the equine hoof wall.
The Journal of experimental biology    May 1, 1996   Volume 199, Issue Pt 5 1133-1146 doi: 10.1242/jeb.199.5.1133
Kasapi MA, Gosline JM.The mechanical properties of fully hydrated equine hoof wall were examined at various loading rates in compact tension (CT) fracture, tensile and three-point bending dynamic tests to determine possible effects of hoof wall viscoelasticity on fracture toughness and tensile parameters. Four cross-head rates were used in CT tests: 1.7 x 10(-5), 1.7 x 10 (-3), 1.7 x 10(-2) and 2.5ms-1; four strain rates were used in tensile tests: 1.6 x 10(-3), 3.2 x 10(-2), 0.33 and 70s(-1). Speeds for the highest test rates were achieved using a large, custom-built impact pendulum. Bending test frequencies range...
Ultrasonographic assessment of fetal well-being during late gestation: development of an equine biophysical profile.
Equine veterinary journal    May 1, 1996   Volume 28, Issue 3 200-208 doi: 10.1111/j.2042-3306.1996.tb03773.x
Reef VB, Vaala WE, Worth LT, Sertich PL, Spencer PA.Mares with complicated pregnancies (illness, problems at parturition or delivery of an abnormal foal, n = 30) were scanned transabdominally from 298 days gestation to term in order to measure fetal size, evaluate fetal well-being and characterise the intrauterine environment. The results of the last scan obtained prior to parturition were compared to normal data obtained from fetuses of comparable gestational age to develop a biophysical profile specific for the equine fetus. Twelve mares produced a normal foal (positive outcome) and 18 mares delivered 19 abnormal foals (negative outcome). Bot...
Spinal accessory nerve biopsy as an ante mortem diagnostic test for equine motor neuron disease.
Equine veterinary journal    May 1, 1996   Volume 28, Issue 3 215-219 doi: 10.1111/j.2042-3306.1996.tb03775.x
Jackson CA, DE Lahunta A, Cummings JF, Divers TJ, Mohammed HO, Valentine BA, Hackett RP.The effectiveness of spinal accessory nerve branch biopsy evaluation as a means to confirm the diagnosis of equine motor neuron disease (EMND) was investigated. Sixteen horses with histories and clinical signs suggestive of EMND and 16 control horses with neither histories nor clinical signs of any neurological disorder, were subjects of the study. Biopsy samples of the ventral branch of the spinal accessory nerve were obtained either surgically, under general anaesthesia or post mortem immediately after euthanasia. Evaluation was done on the spinal cord of all horses to serve as the definitiv...
Evaluation of a one-step test for rapid, in practice detection of rotavirus in farm animals.
The Veterinary record    April 20, 1996   Volume 138, Issue 16 393-395 doi: 10.1136/vr.138.16.393
de Verdier Klingenberg K, Esfandiari J.An immunochromatographic test for the detection of group A rotavirus was evaluated against a reference group A rotavirus ELISA, by using a panel of 161 bovine, porcine and equine faecal samples submitted for routine examination. The sensitivity of the test was 89 per cent and the specificity 99 per cent compared with the ELISA. Its reproducibility was 100 per cent. The simplicity and rapidity of the test procedure make it suitable for use in practice.
Testosterone secretion during early pregnancy in mares.
Theriogenology    April 15, 1996   Volume 45, Issue 6 1211-1219 doi: 10.1016/0093-691x(96)00076-3
Daels PF, Chang GC, Hansen B, Mohammed HO.We have characterized the testosterone secretion pattern during the first 80 d of pregnancy in mares and determined the sources that contribute to circulating testosterone levels during this period. Ten untreated, pregnant mares (Group 1), 10 altrenogest-treated, pregnant mares (Group 2), and 10 altrenogest-treated, pregnant mares in which the CL was eliminated by administration of PGF-2alpha on Day 16 (Group 3) were used in this study. Complete luteolysis occurred following PGF-2alpha administration in all mares in Group 3. Six of the 10 mares in Group 3 did not have an active CL until after ...
Benefit-cost analysis of vaccination of horses as a strategy to control equine monocytic ehrlichiosis.
Journal of the American Veterinary Medical Association    April 15, 1996   Volume 208, Issue 8 1295-1299 
Atwill ER, Mohammed HO.To determine whether horses in New York should be vaccinated against equine monocytic ehrlichiosis (EME). Methods: Decision-tree analyses of data from a cross-sectional study and a case-control study. Methods: Horses in New York. Methods: Annual expected monetary loss per horse attributable to EME was calculated for vaccinated and nonvaccinated horses in New York. Because risk of being seropositive was dependent on county in which the horse was located, farm elevation, and use of each horse, decision-tree analyses were stratified by these factors. Results: Annual expected monetary loss per hor...
In vitro induction of acrosome reactions in stallion spermatozoa by heparin and A23187.
Theriogenology    April 15, 1996   Volume 45, Issue 6 1201-1210 doi: 10.1016/0093-691x(96)00075-1
Christensen P, Whitfield CH, Parkinson TJ.The ability of the glycosaminoglycan, heparin, and the calcium ionophore, A23187, to induce acrosome reaction in equine spermatozoa was assessed using semen from 3 warmblood stallions of known high fertility. After collection of semen, the spermatozoa were washed and incubated in vitro with heparin or A23187. Incubation periods were 0, 4, 6 or 8 h with 0, 1, 10 or 100 microg/ml heparin or 0, 10, 30 or 60 min with 0, 0.01, 0.1, 1 or 10 microM A23187, respectively. Acrosome reactions were determined by staining the spermatozoa with naphthol yellow S plus erythrosin B, and sperm viability was ass...
Determination of phenylbutazone and oxyphenbutazone in plasma and urine samples of horses by high-performance liquid chromatography and gas chromatography-mass spectrometry.
Journal of chromatography. B, Biomedical applications    April 12, 1996   Volume 678, Issue 2 211-218 doi: 10.1016/0378-4347(95)00508-0
Neto LM, Andraus MH, Salvadori MC.A method is described for the qualitative and quantitative determination of phenylbutazone and oxyphenbutazone in horse urine and plasma samples viewing antidoping control. A horse was administered intravenously with 3 g of phenylbutazone. For the qualitative determination, a screening by HPLC was performed after acidic extraction of the urine samples and the confirmation process was realized by GC-MS. Using the proposed method it was possible to detect phenylbutazone and oxyphenbutazone in urine for up to 48 and 120 h, respectively. For the quantitation of these drugs the plasma was deprotein...
Assessment of the effect of three treatments to remove intrauterine fluid on pregnancy rate in the mare.
The Veterinary record    April 6, 1996   Volume 138, Issue 14 320-323 doi: 10.1136/vr.138.14.320
Pycock JF, Newcombe JR.The effects on pregnancy rate of three different treatments to remove intrauterine fluid were assessed in 1267 mares. The mares were mated and allocated, in strict rotation, to four treatment groups: 1) untreated controls, 2) intrauterine infusion of broad spectrum antibiotics, 3) intravenous injection of oxytocin, 4) intravenous injection of oxytocin followed by intrauterine antibiotics. The pregnancy status of the mares was determined 13 to 15 days and 27 to 30 days after ovulation by transrectal ultrasonography. The pregnancy rate of group 4 (72 per cent) was higher than that of group 2 (64...
The effects of submaximal exercise on the pharmacokinetics of furosemide in horses.
Journal of veterinary pharmacology and therapeutics    April 1, 1996   Volume 19, Issue 2 164-166 doi: 10.1111/j.1365-2885.1996.tb00033.x
Dyke TM, Hinchcliff KW, Sams RA, McKeever KH, Muir WW.No abstract available
Regulation of glycosaminoglycan metabolism by bone morphogenetic protein-2 in equine cartilage explant cultures.
American journal of veterinary research    April 1, 1996   Volume 57, Issue 4 554-559 
Loredo GA, MacDonald MH, Benton HP.To investigate whether recombinant human bone morphogenetic protein-2 (rhBMP-2) regulates glycosaminoglycan (GAG) synthesis and release from equine articular cartilage explant cultures. Methods: Equine articular cartilage explants were maintained in vitro for 7 days in the presence of 0 (control), 1, 10, or 100 ng of rhBMP-2/ml. Synthesis and release of GAG were assessed as measures of production and degradation of the extracellular matrix, respectively. Methods: 6 horses (age range, 2 to 25 years old) without clinically detectable musculoskeletal abnormalities. Methods: Rate of synthesis of G...
Intracellular calcium concentration in equine spermatozoa attached to oviductal epithelial cells in vitro.
Biology of reproduction    April 1, 1996   Volume 54, Issue 4 783-788 doi: 10.1095/biolreprod54.4.783
Dobrinski I, Suarez SS, Ball BA.Interaction of spermatozoa with oviductal epithelial cells (OEC) in the oviductal isthmus prolongs the life span of spermatozoa. The hypothesis that the interaction of equine spermatozoa with OEC affects their intracellular calcium concentration ([Ca2+]i) was tested in a sperm-OEC coculture model. Changes in [Ca2+]i in spermatozoa loaded with the fluorescent calcium indicator indo-1 acetoxymethylester (AM) were determined for spermatozoa attached to OEC or to Matrigel, as well as for free-swimming spermatozoa incubated without oviductal epithelium. [Ca2+]i was determined before incubation and ...
Proliferative enteropathy in a foal caused by Lawsonia intracellularis-like bacterium. Williams NM, Harrison LR, Gebhart CJ.No abstract available
Use of semen as biopsy material for assessment of health status of the stallion reproductive tract.
The Veterinary clinics of North America. Equine practice    April 1, 1996   Volume 12, Issue 1 101-110 doi: 10.1016/s0749-0739(17)30297-3
Veeramachaneni DN, Sawyer HR.Conventional light microscopic evaluation does not fully utilize potential indicators in seminal ejaculates for diagnosis of disorders of the reproductive tract. The technique of evaluation of all cellular components of semen, as described in this article, utilizing both light and transmission electron microscopy is a valuable diagnostic tool. Compare with other common biopsy procedures, use of semen as biopsy material is noninvasive, more representative than excisional biopsy, less expensive, and helps in the longitudinal evaluation after a therapeutic regimen.
A comparison of equid herpesvirus-1 (EHV-1) vascular lesions in the early versus late pregnant equine uterus.
Journal of comparative pathology    April 1, 1996   Volume 114, Issue 3 231-247 doi: 10.1016/s0021-9975(96)80045-4
Smith KC, Mumford JA, Lakhani K.Four Welsh Mountain pony mares at 3 months of gestation and one mare at 5 months were inoculated intranasally with equid herpesvirus-1 (EHV-1: Ab4 isolate) at doses of 10(5) to 10(6.6) TCID50. All five mares became infected, but no cases of paresis or abortion occurred. On days 8, 9, 11, 12 (3-month-pregnant mares) and 13 (5-month-pregnant mare) after infection, a detailed examination of the pregnant uterus was made. Small numbers of vascular lesions with EHV-1 antigen expression in endothelial cells were present in the uteri of the early gestational mares; thrombi were rare and foci of thromb...
Adverse drug reactions: report of the Australian Veterinary Association Adverse Drug Reaction Subcommittee, 1994.
Australian veterinary journal    April 1, 1996   Volume 73, Issue 4 132-136 doi: 10.1111/j.1751-0813.1996.tb10005.x
Maddison JE.Seventy-seven reports of suspected adverse drug reactions (ADRs) were received by the Adverse Drug Reaction Subcommittee (ADRSc) of the Australian Veterinary Association from April 1993 to December 1994 inclusive. The number of reports received/number of animals involved per species were: dogs (32/44), cats (18/31), horses (17/48), and cattle (10/21). Of these, 49 (64%) were classified as definite ADRs and 9 (12%) as probable ADRs. In 11 (14%) reports an ADR could not be substantiated or there was insufficient information available to make a decision. Eight reports were not classified because ...
Methods for the Detection of Trichinellosis in Horses.
Journal of food protection    April 1, 1996   Volume 59, Issue 4 420-425 doi: 10.4315/0362-028X-59.4.420
Gamble HR, Gajadhar AA, Solomon MB.Twelve horses were infected with various doses of Trichinella spiralis and then tested for infection using direct (artificial digestion) and indirect (enzyme immunoassay) methods. Horses became infected in a dose-dependent manner. Larvae accumulated preferentially in the tongue, followed by the masseter, neck, supraspinatus, trapezius, and diaphragm. At lower infection levels, the tongue harbored several times more parasites than were found in other tissues. The sensitivity of artificial digestion methods for detecting infections was directly related to sample size. One-gram samples were not r...
[Acute pain in the horse and one possibility for its objective evaluation].
Tierarztliche Praxis    April 1, 1996   Volume 24, Issue 2 108-112 
Zierz J, Wintzer HJ.To judge acute processes of pain objectively the results are told of a determination of adrenaline and noradrenaline in the plasma of 30 horses suffering from pain. Besides a scheme basing on an awarding of points is developed to ascertain changes of physiological and ethological parameters caused by pain. These results in changes of behaviour are compared to results determined by laboratory experiments. Concerning pain of medium and high level a relation to the concentration of catecholamines is noticed. Therefore the total of certain clinical observations is suitable for graduating acute pai...
Veterinary clinical applications of acupuncture.
Journal of alternative and complementary medicine (New York, N.Y.)    April 1, 1996   Volume 2, Issue 1 65-75 doi: 10.1089/acm.1996.2.65
Bossut DF.No abstract available
Immunohistolocalization of the carbonic anhydrase isoenzymes (CA-I, CA-II, and CA-III) in the reproductive tract of male horses.
American journal of veterinary research    April 1, 1996   Volume 57, Issue 4 439-443 
Asari M, Sasaki K, Miura K, Ichihara N, Nishita T.To elucidate locations of cytosolic carbonic anhydrase isoenzyme (CA-I, CA-II, and CA-III)-positive epithelial cells in equine male reproductive organs. Methods: Descriptive and immunohistochemical study. Methods: 4 clinically normal male horses. Methods: The testis (seminiferous tubules, rete tubules), epididymis (initial, middle, and terminal segments), proximal and distal portions of the ductus deferens, ampulla ductus deferentis, seminal vesicle, prostate, and bulbourethral gland were excised from euthanatized horses after administration of an overdose of pentobarbital. The tissue specimen...
Characterization of two polymorphic horse microsatellites: HMS15 and HMS20.
Animal genetics    April 1, 1996   Volume 27, Issue 2 123 
Guérin G, Bertaud M.No abstract available
Local distribution of mepivacaine after distal interphalangeal joint injection in horses.
American journal of veterinary research    April 1, 1996   Volume 57, Issue 4 422-426 
Keegan KG, Wilson DA, Kreeger JM, Ellersieck MR, Kuo KC, Li Z.To evaluate the distribution of mepivacaine hydrochloride after distal interphalangeal (DIP) joint injection in horses. Methods: Prospective, uncontrolled study. Methods: 10 adult horses. Methods: 30 minutes before euthanasia, 8 ml of 2% mepivacaine hydrochloride was injected into the dorsal pouch of a forelimb DIP joint. Synovial tissue from the DIP joint and podotrochlear (navicular) bursa and bone tissue from the medullary cavity of the distal sesamoid (navicular) bone were taken from both forelimbs immediately after death. All synovial and bone specimens were analyzed for tissue concentrat...
Methods for induction of capacitation and the acrosome reaction of stallion spermatozoa.
The Veterinary clinics of North America. Equine practice    April 1, 1996   Volume 12, Issue 1 111-117 doi: 10.1016/s0749-0739(17)30298-5
Graham JK.Methodologies to capacitate bovine spermatozoa, induce the acrosome reaction, and fertilize bovine oocytes in vitro have been established. The capability to do the same with stallion spermatozoa, however, is not available. Several different methods have been used to capacitate stallion spermatozoa with variable results. More basic research needs to be done to establish in vitro conditions necessary to capacitate and induce an acrosome reaction in stallion spermatozoa. Although much progress can be expected in this area, it is unlikely that the general practitioner will use these technologies i...
Equine dinucleotide repeat polymorphisms at loci LEX002, -003, -004, -005, -007, -008, -009, -010, -011, -013 and -014.
Animal genetics    April 1, 1996   Volume 27, Issue 2 126-127 
Coogle L, Bailey E, Reid R, Russ M.No abstract available
Ultrasonographic renal changes associated with phenylbutazone administration in three foals.
The Canadian veterinary journal = La revue veterinaire canadienne    April 1, 1996   Volume 37, Issue 4 235-236 
Léveillé R, Miyabayashi T, Weisbrode SE, Biller DS, Takiguchi M, Williams JF.No abstract available
Disposition and excretion of 6-methoxy-2-naphthylacetic acid, the active metabolite of nabumetone in horses.
American journal of veterinary research    April 1, 1996   Volume 57, Issue 4 517-521 
Soma LR, Uboh CE, Rudy JA, Smith MS.To examine, in horses, the disposition and excretion of the active metabolite 6-methoxy-2-naphthylacetic acid (6MNA) of the nonsteroidal anti-inflammatory prodrug nabumetone. Methods: Pharmacokinetic analysis of 6MNA after oral administration of nabumetone and IV administration of 6MNA. Methods: Using a crossover design, 5 horses were orally administered 3.7 mg of nabumetone/kg of body weight. After a 3-week washout period, 4 horses were administered 2.5 mg of 6MNA/kg, IV. Results: Absorption of nabumetone from the gastrointestinal tract and its metabolism to 6MNA had a median appearance half-...
The effects of bovine somatotropin (bST) and porcine somatotropin (pST) on growth factor and metabolic variables in horses.
Journal of animal science    April 1, 1996   Volume 74, Issue 4 886-894 doi: 10.2527/1996.744886x
Buonomo FC, Ruffin DS, Brendemeuhl JP, Veenhuizen JJ, Sartin JL.Effects of exogenous pST and bST on metabolic and growth factor variables were examined in three studies with lighthorse mares (455 to 545 kg). In Study 1, eight mares received five s.c. injections of bST or pST (30 mg/d). In Studies 2 and 3, five mares received one s.c. injection of a prolonged release formulation designed to deliver 500 mg of bST (Study 2) or pST (Study 3) over 14 d. Blood samples were collected for several days before injection to establish baseline values, at frequent intervals during treatment, and for several days thereafter. In all studies, blood urea nitrogen concentra...
Cryopreservation of equine embryos.
The Veterinary clinics of North America. Equine practice    April 1, 1996   Volume 12, Issue 1 85-99 doi: 10.1016/s0749-0739(17)30296-1
Seidel GE.Principles and procedures for cryopreservation of equine embryos are described. Embryos less than 250 microM in diameter can be cryopreserved successfully if glycerol is used as the cryoprotectant. Cooling is takes place in such a way that most of the water leaves the cells before intracellular ice forms, and glycerol is removed after thawing without undue osmotic swelling of cells. Vitrification procedures also show promise for small embryos. Satisfactory procedures for cryopreserving embryos of more than 250 microM in diameter are not yet available.
Superovulation.
The Veterinary clinics of North America. Equine practice    April 1, 1996   Volume 12, Issue 1 1-11 doi: 10.1016/s0749-0739(17)30291-2
McCue PM.Development of a superovulation technique that is successful, safe, and commercially available would revolutionize the equine breeding industry. However, the reality is that ovulation rates for mares following existing superovulatory treatment are much lower than for cattle. This dichotomy has been attributed to the relatively limited area available in the ovulation fossa for ovulation to occur, combined with the large size of the equine preovulatory follicle. In addition, the number of ovulations in the mare may be limited physiologically by the size of the follicular cohort that may be rescu...