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Topic:Disease Diagnosis

Disease diagnosis in horses involves the identification and characterization of illnesses through various diagnostic methods and tools. This process is essential for effective veterinary care and management of equine health. Techniques used in diagnosing diseases in horses include clinical examinations, laboratory tests, imaging modalities such as ultrasonography and radiography, and molecular diagnostics. Blood tests are frequently utilized to assess parameters such as complete blood count and biochemical profiles, which can indicate underlying health issues. Additionally, advancements in genetic testing and biomarker identification have enhanced the ability to detect specific diseases early. This page aggregates peer-reviewed research studies and scholarly articles that explore diagnostic methodologies, their applications, and their impact on equine health management.
Traction apophysitis in a yearling colt resembling Osgood-Schlatter disease in man.
Equine veterinary journal    January 1, 1990   Volume 22, Issue 1 60-61 doi: 10.1111/j.2042-3306.1990.tb04210.x
Kold SE.No abstract available
Primary cholangiohepatitis in a horse.
The Cornell veterinarian    January 1, 1990   Volume 80, Issue 1 35-40 
Schulz KS, Simmons TR, Johnson R.An 8-year-old mare was presented to the New York State College of Veterinary Medicine Large Animal Clinic for evaluation of anorexia, fever and icterus. The mare had a 5-day history of anorexia, depression and tongue protrusion. Diagnostic procedures included serum hepatic enzyme activities, serum bile acid concentrations, blood ammonia evaluations and hepatic ultrasound and ultrasound guided biopsy. The history, clinical pathology and histopathology in this case supported a probable diagnosis of primary septic cholangiohepatitis.
Ectopic ureter in the horse: Three cases and a review of the literature.
The Canadian veterinary journal = La revue veterinaire canadienne    January 1, 1990   Volume 31, Issue 1 26-30 
Pringle JK, Ducharme NG, Baird JD.Ureterovesicular anastomosis resulted in resolution of the clinical signs of urinary incontinence in three horses with unilateral ectopic ureter. Follow-up of two of the horses ten months and three years later indicated no further urinary tract problems; the third horse died four days after surgery from intestinal infarction.Diagnosis can be readily confirmed by antegrade or retrograde ureterography, or endoscopic visualization of the ectopic ureteral openings. Nephrectomy appears indicated in cases of unilateral ectopic ureter with associated ipsilateral urinary tract infection or hydronephro...
Isolation of mycobacteria from the nasal cavity of horses.
Equine veterinary journal    January 1, 1990   Volume 22, Issue 1 54-55 doi: 10.1111/j.2042-3306.1990.tb04208.x
Mair TS, Jenkins PA.No abstract available
Human, canine and equine (Equus caballus) leishmaniasis due to Leishmania braziliensis (= L. braziliensis braziliensis) in the south-west region of São Paulo State, Brazil.
Memorias do Instituto Oswaldo Cruz    January 1, 1990   Volume 85, Issue 1 133-134 doi: 10.1590/s0074-02761990000100026
Yoshida EL, Correa FM, Marques SA, Stolf HO, Dillon NL, Momen H, Grimaldi G.No abstract available
[A rapid isolation of Venezuelan equine encephalomyelitis virus using the lanthanide immunofluorescence assay].
Voprosy virusologii    January 1, 1990   Volume 35, Issue 1 77-79 
Kharitonenkov IG, Gaĭdamovich SIa, Pomelova VG, Sokolova MV, Lavrova NA, Leonov SV, Zlobin VN.No abstract available
Diagnosis and treatment of pulmonary histoplasmosis in a horse.
The Cornell veterinarian    January 1, 1990   Volume 80, Issue 1 97-103 
Cornick JL.A 2-year-old Trakehner filly with pulmonary histoplasmosis is presented. Clinical signs included weight loss, intermittent fever, dyspnea and depression. Diagnosis was based on thoracic radiography, transtracheal wash cytology and lung aspirate cytology. A 5-week regimen of Amphotercin-B administered intravenously resulted in clinical recovery and return of the animal to normal activity. A brief review of histoplasmosis in man and animal is included.
Allergens of horse epithelium. I. Physicochemical and immunochemical characterization of five different horse epithelium raw materials used for allergen extract preparation.
International archives of allergy and applied immunology    January 1, 1990   Volume 92, Issue 3 309-317 
Franke D, Maasch HJ, Wahl R, Schultze-Werninghaus G, Bretting H.We investigated five horse epithelial allergen extracts prepared from different qualities of raw material by several biochemical and immunochemical methods. Horse serum albumin and horse serum were used to identify serum-related antigens. We found high similarities as well as marked differences between the extracts. There were strong differences in the protein contents, the protein patterns obtained by isoelectric focusing and sodium dodecyl sulfate polyacrylamide gel electrophoresis, the total allergenic activities obtained by radioallergosorbent test inhibition assays and the amounts and num...
Hypertrophic osteopathy–an unusual but treatable condition.
Equine veterinary journal    January 1, 1990   Volume 22, Issue 1 1-2 doi: 10.1111/j.2042-3306.1990.tb04190.x
Shneerson JM.No abstract available
Detection of African horsesickness (AHS) in recently vaccinated horses with inactivated vaccine in Qatar.
Revue d'elevage et de medecine veterinaire des pays tropicaux    January 1, 1990   Volume 43, Issue 1 33-35 
Hassanain MM, al-Afaleq AI, Soliman IM, Abdullah SK.Two 7-year old Arabian racing horses were reported to show typical AHS symptoms in Qatar and died shortly after. The horses had been vaccinated with formol inactivated vaccine approximately 10 days before the onset of the disease. Blood samples from these horses were collected and AHS virus isolated from one sample after intracerebral (i.c.) inoculation into suckling mice. The virus identity was confirmed by complement fixation test (CFT) using the virus antigen and reference type 9 of AHS virus hyperimmune serum. The serotype of the isolated virus was identified by serum neutralization test (...
The toxic factor in white snakeroot: identity, analysis and prevention.
Veterinary and human toxicology    January 1, 1990   Volume 32 Suppl 81-88 
Beier RC, Norman JO.White snakeroot (Eupatorium rugosum Houtt) has been known to cause trembles in animals and milk sickness in humans since the American Revolution. It still continues to poison animals. Horses and goats are particularly sensitive to white snakeroot poisoning. Resurgence of livestock production on small farm units, and utilization of fresh raw milk may result in milk sickness; if the animals have white snakeroot exposure. The goat is the only animal with good toxicity threshold data. In other animals and humans the toxicity thresholds of white snakeroot are not known, and that until responsible t...
[New types of virus infections of domestic animals in the German Democratic Republic. 1. Serologic survey studies of the distribution of equine torovirus infections in the GDR].
Archiv fur experimentelle Veterinarmedizin    January 1, 1990   Volume 44, Issue 2 251-253 
Liebermann H.Sera collected from 124 horses were checked by means of the serum neutralisation test against equine Bern virus. Torovirusspecific antibodies were recordable from 35 percent of all horses tested. These results are likely to suggest that toroviruses are widespread in the GDR and occur not only in horses but in other domestic animals and in man, as well.
Isolation of Clostridium perfringens from foals.
Microbios    January 1, 1990   Volume 64, Issue 260-261 153-158 
Kanoe M, Inoue S, Abe T, Anzai T, Kamada M, Imagawa H, Kanemaru T.Clostridium perfingens was isolated from four of 29 healthy foals and from all twelve foals with gastrointestinal diseases. The range of viable counts of C. perfringens in the faeces was 10(1)-10(5)/g and in the intestinal specimens 10(1)-10(7)/g. Of 41 isolates of C. perfringens, 37 were considered to be type A. Enterotoxin of the organism was demonstrated in the intestinal contents of five of eight foals with enteric diseases. These findings suggested that C. perfringens is a likely pathogen of foal intestinal diseases.
Gastric lesions and gastric ulceration in foals.
Equine veterinary journal    January 1, 1990   Volume 22, Issue 1 2-47 doi: 10.1111/j.2042-3306.1990.tb04191.x
Roberts MC.No abstract available
[Enzootic viral abortion on a stud farm in east Switzerland].
Schweizer Archiv fur Tierheilkunde    January 1, 1990   Volume 132, Issue 7 385-391 
Frey R, Lieb A.An outbreak of abortion due to the equine herpesvirus-1 (EHV-1) in the eastern part of Switzerland is reviewed. Seven of eleven pregnant mares aborted within twenty-three days in January 1989. Four weeks later another foal died a few minutes after parturition. Three mares delivered live foals in February, March and April without any complications. The examination of the eight dead foals revealed an EHV-1 Infection. The clinical signs and the pathology are discussed. Severe complications during the early post-parturient time are in contrast to the uncomplicated outcome mentioned by other author...
Feedtrough dirt as a source of Clostridium botulinum type C intoxication in a group of farm horses.
The Canadian veterinary journal = La revue veterinaire canadienne    January 1, 1990   Volume 31, Issue 1 13-19 
Heath SE, Bell RJ, Chirino-Trejo M, Schuh JC, Harland RJ.Four horses from the same farm developed clinical signs of botulism during the winter months; three of these horses died. One horse survived an initial attack and recovered over a three-week period, but died during a second attack. The horse that survived took six weeks to recover. Clinical and postmortem examination ruled out other causes of disease. Confirmation of the diagnosis was made by isolation of Clostridium botulinum type C toxin from the dirt in the bottom of an oak feedtrough used by all horses, and from the colonic contents of one of the horses that died. To our knowledge, this is...
An attempt to determine the tissue origin of equine serum alkaline phosphatase by isoelectric focusing.
Canadian journal of veterinary research = Revue canadienne de recherche veterinaire    January 1, 1990   Volume 54, Issue 1 119-125 
Ellison RS, Jacobs RM.The main purpose of this study was to ascertain whether isoelectric point determination of alkaline phosphatase (AP) using an isoelectric focusing technique on agarose gels could define the isoenzymes present in healthy equine serum. The isoelectric points of AP extracted from nine tissues ranged from pH 3.5 to 7.5 with all tissues having multiple bands. There was considerable similarity in band pattern among tissues, with only pancreatic and colostral AP having substantially different isoelectric points from the others. Sera contained thirteen bands with isoelectric points ranging from pH 3.5...
Ultrasound speed in equine cortical bone: effects of orientation, density, porosity and temperature.
Journal of biomechanics    January 1, 1990   Volume 23, Issue 11 1139-1143 doi: 10.1016/0021-9290(90)90006-o
McCarthy RN, Jeffcott LB, McCartney RN.Ultrasound speed, as measured by a transmission technique in equine cortical bone, was found to vary markedly with the direction of the ultrasound path through the bone. Using bone samples from the mid-site of the third metacarpus of 20 horses, the ultrasound speed was measured as 4125 m s-1 in the longitudinal direction, 3442 m s-1 in the circumferential or transverse direction, and 3428 m s-1 in the radial direction. These results confirm the anisotropic properties of compact bone. Ultrasound speed had a positive linear relationship when compared with bone specific gravity of cortical bone (...
The ultrastructure of Strongylus vulgaris-mediated equine chronic mesenteric arteritis.
Veterinary research communications    January 1, 1990   Volume 14, Issue 1 41-46 doi: 10.1007/BF00346382
Morgan SJ, Van Houten DS.Cells found in the intima and media of the cranial mesenteric artery of a mature mare with chronic arteritis were identified as smooth muscle cells and occurred in association with collagen and elastin fibres. As no fibroblasts were demonstrable within these regions, the smooth muscle cells were the likely source of the extracellular matrix. In contrast, the abnormal adventitis from the same artery contained abundant fibroblasts which are considered to be the source of the adventitial collagen.
Use of erythrocyte fragility profiles for monitoring immune-mediated haemolysis in horses.
Research in veterinary science    January 1, 1990   Volume 48, Issue 1 138-140 
Taylor FG, Cooke BJ.The fragility of erythrocytes is easily demonstrated by their ability to withstand osmotic swelling and lysis in solutions of increasingly hypotonic saline. In healthy animals a plot of percentage haemolysis against increasing hypotonicity produces a sigmoid curve. Using the same data a derivative curve calculated from haemolytic increments shows a normal distribution of fragility within samples. In enhanced fragility due to immune-mediated haemolytic anaemia, these profiles of haemolysis are markedly altered and the derivative curve becomes multiphasic, indicating the presence of subpopulatio...
Laboratory diagnosis of African horse sickness: comparison of serological techniques and evaluation of storage methods of samples for virus isolation. House C, Mikiciuk PE, Berninger ML.Five serological methods of diagnosing African horse sickness were evaluated, using a battery of serum samples from experimental horses vaccinated and challenged with each serotype of African horse sickness virus (AHSV1 through AHSV9): agar gel immunodiffusion (AGID), indirect fluorescent antibody (IFA), complement fixation (CF), virus neutralization (VN), and enzyme-linked immunosorbent assay (ELISA). The 5 tests were also compared using a panel of field samples, convalescent equine sera with antibodies to domestic equine viral diseases, and sera from horses awaiting export. The ELISA describ...
Temperature sensitivity of equine herpesvirus isolates: a brief review.
SAAS bulletin, biochemistry and biotechnology    January 1, 1990   Volume 3 124-128 
Jacob RJ, Price R, Bouchey D, Davis T, Borchelt J.This article reviews the findings on temperature sensitivity of equine herpesvirus isolates with an emphasis on equine herpesvirus 3, etiological agent of equine coital exanthema. The hypothesis is presented that the relative apathogenic nature of this herpesvirus may be an indirect result of its inability to synthesize and/or process glycoproteins needed by the virus to produce infectious virions at the normal body temperature of its natural host. It is suggested that equine herpesvirus 3 is the more evolved and naturally attenuated member of the equine herpesviruses.
Disseminated coccidioidomycosis in a horse with osteomyelitis.
Journal of the American Veterinary Medical Association    January 1, 1990   Volume 196, Issue 1 106-109 
Kramme PM, Ziemer EL.Coccidioidal osteomyelitis was diagnosed in a horse after a 6-month period of coughing, weight loss, and lameness. The horse was euthanatized and the diagnosis was confirmed by gross and microscopic findings.
Leiomyosarcoma of the duodenum in two horses.
Journal of comparative pathology    January 1, 1990   Volume 102, Issue 1 119-123 doi: 10.1016/s0021-9975(08)80014-x
Mair TS, Taylor FG, Brown PJ.Two horses affected by chronic, intermittent colic were found, at post-mortem examination, to have localized annular thickening of a segment of the duodenum. Histological examination of the lesion in both cases revealed a tumour composed of bundles of oval or spindle-shaped cells that stained as muscle with van Gieson stain. The histological diagnosis was leiomyosarcoma. The tumour had caused partial bowel obstruction in both horses.
Equine infectious anemia virus (EIAV) humoral responses of recipient ponies and antigenic variation during persistent infection.
Archives of virology    January 1, 1990   Volume 111, Issue 3-4 199-212 doi: 10.1007/BF01311054
Rwambo PM, Issel CJ, Adams WV, Hussain KA, Miller M, Montelaro RC.Three ponies were inoculated with plasma containing 10(4.8) TCID50 of equine infectious anemia virus (EIAV) and observed for 165 to 440 days. Each pony developed a febrile response within 3 weeks of infection during which a plasma viremia greater than or equal to 10(3.5) TCID50/ml was observed. Analyses of four isolates from sequential febrile episodes in a single pony were conducted by two-dimensional tryptic peptide maps and with monoclonal antibodies in immunoblots. Structural and antigenic alterations were observed in the envelope glycoproteins gp90 and gp45, with greatest variation in gp9...
[Experiences with the QBC-V hematology system at the veterinary hospitals of Zurich and Bern].
Schweizer Archiv fur Tierheilkunde    January 1, 1990   Volume 132, Issue 5 261-266 
Meister D, Tschudi P, Hermann M, Lutz H.The QBC V hematology system was tested with respect to its application in veterinary medicine. PCV's and counts of total leukocytes, granulocytes, lympho/monocytes and platelets collected from 435 horses, dogs and cats were determined and compared with conventionally measured values. Precision and accuracy were found to be good for the majority of parameters. In the authors' opinion the QBC V hematology system is well suited for use in veterinary practice.
Standard karyotype of the domestic horse (Equus caballus). Committee for standardized karyotype of Equus caballus. The Second International Conference for Standardization of Domestic Animal Karyotypes, INRA, Jouy-en Josas, France, 22nd-26th May 1989.
Hereditas    January 1, 1990   Volume 112, Issue 3 289-293 doi: 10.1111/j.1601-5223.1990.tb00069.x
Richer CL, Power MM, Klunder LR, McFeely RA, Kent MG.The following decisions concerning the banded karyotype of the horse (Equus caballus) were made at the second International conference for Standardization of Domestic Animal Karyotypes, held at Jouy-en Josas, France, 22nd-26th May 1989: (1) numbering of the chromosomes was modified to correspond to an arrangement into only two groups (the non-acrocentrics and the acrocentrics) within which the autosomes are placed according to length alone; (2) a more compact karyotype arrangement was adopted: chromosomes 1 to 5 on the first row, 6 to 10 on the second, 11 to 13, and, at the far right, X and Y ...
In vitro isolation of a neutralization escape mutant of equine infectious anemia virus (EIAV).
Archives of virology    January 1, 1990   Volume 111, Issue 3-4 275-280 doi: 10.1007/BF01311062
Rwambo PM, Issel CJ, Hussain KA, Montelaro RC.A neutralization escape mutant (A/1 E) of equine infectious anemia virus was isolated after 13 passages in cell culture in the presence of serum containing antibodies to type- and group-specific determinants of EIAV envelope glycoproteins. Loss of neutralization by the selecting serum correlated with loss of two epitopes in the major envelope glycoprotein gp90 of A/1 E which were present in a parallel variant isolated from a persistently infected pony.
Pulmonary shunting by the bronchial artery in the anaesthetized horse.
Experimental physiology    January 1, 1990   Volume 75, Issue 1 115-118 doi: 10.1113/expphysiol.1990.sp003378
Gleed RD, Dobson A, Hackett RP.In the quietly standing horse the bronchial arterial blood flow is low, 0.1-0.2% of the pulmonary arterial flow. In horses anaesthetized with halothane, the bronchial arterial flow is reduced by a greater fraction than that in the pulmonary artery. Thus the shunting through the bronchial circulation is decreased about 3-fold by anaesthesia, and cannot, therefore, contribute significantly to the increased alveolar-arterial gradient seen in dorsal recumbency. The results indicate bronchial vasoconstriction under anaesthesia.
Comparison of bronchoalveolar lavage and respiratory secretion cytology in horses with clinically diagnosed chronic pulmonary disease.
Schweizer Archiv fur Tierheilkunde    January 1, 1990   Volume 132, Issue 9 505-510 
Winder NC, Hermann M, Grünig G, Hulliger C, Von Fellenberg R.Thirty-nine horses and 3 ponies underwent a thorough respiratory examination and were grouped as follows: healthy (4 horses and 1 pony); mild chronic pulmonary disease (CPD 11 horses); moderate CPD (16 horses and 1 pony); and severe CPD (8 horses and 1 pony). Bronchoalveolar lavage (BAL) fluid collected from all animals and respiratory secretions (RS) obtained from 39 of these animals were evaluated cytologically and the results were compared. It was concluded that cytological examination of either BAL fluid or RS was useful in diagnosing various equine pulmonary diseases. The only advantage t...