Statistical analysis in equine research involves the application of mathematical techniques to collect, review, and interpret data related to horse health, behavior, and performance. This field encompasses a variety of methods, including descriptive statistics, inferential statistics, and multivariate analysis, to identify patterns, test hypotheses, and draw conclusions from equine data. Statistical analysis aids in understanding various aspects of equine science, such as disease prevalence, treatment efficacy, genetic traits, and performance metrics. This page aggregates peer-reviewed research studies and scholarly articles that explore the methodologies, applications, and outcomes of statistical analysis in the context of equine studies.
Soma LR, Laster L, Oppenlander F, Barr-Alderfer V.In 3 groups of horses with exercise-induced pulmonary hemorrhage (EIPH), comparisons of racing times and finishing positions were made between the 5 races before the horses were given furosemide and 5 races after furosemide administration. The horses were grouped according to 3 methods used to diagnose EIPH: group 1, observation of hemorrhage at the nostrils within 1 hour after a workout or race; group 2, observation of pulmonary hemorrhage only by endoscopic examination after a race or workout; and group 3, observation of hemorrhage at the nostrils during a race or immediately after a race. G...
Kovár J.Single biochemical analyses can be used for the diagnosis of animal diseases only with the knowledge of the effects that may distort the single result. The study of the repeatability of analyses is described in the four basic enzymes (AST, ALP, GMT, LD), which are most frequently used for diagnosis. The experiment was conducted in a group of ten Kladrub mares. Six blood samples were taken from each of the mares within ten days. The measured values were subjected to statistical processing and repeatability coefficients (r op) were calculated. All the r op values were high (ALP--0.96, LD--0.93, ...
Tolley EA, Notter DR, Marlowe TJ.Repeatabilities (t) and heritabilities (h2) of racing time were estimated from data on 7,206 2- and 3-yr-old Standardbred pacers and trotters competing in 1-mile (1.6 km) charted races at six tracks between 1975 and 1978. A total of 38,487 records representing 2,387 sire progeny groups were divided into subsets by gait, age and track. Initially, the designation "class of race" was recognized as a subjective categorization that reflected nonrandom assignments of horses to races. After extensive investigation, we concluded that racing times should be adjusted by linear regression for the time of...
Pascoe PJ, McDonell WN, Trim CM, Van Gorder J.A retrospective survey of 300 surgical treatments for colic involving 341 interventions was carried out to determine mortality rates and associated factors. These horses had been referred to the Ontario Veterinary College over the period September 1974 to February 1980. Data from the case records was collected and stored on a computer and statistical analysis was carried out using X(2) tests.Fifty percent (150/300) of the horses survived to be discharged from the hospital. Fifty-two horses were euthanized during the operation and another ten horses should have been; if these cases are excluded...
Reiffsteck A, Dehennin L, Scholler R.Estrone, 2-methoxyestrone and estradiol-17 beta have been definitely identified in seminal plasma of man, bull, boar and stallion by high resolution gas chromatography associated with selective monitoring of characteristic ions of suitable derivatives. Quantitative estimations were performed by isotope dilution with deuterated analogues and by monitoring molecular ions of trimethylsilyl ethers of labelled and unlabelled compounds. Concentrations of unconjugated and total estrogens are reported together with the statistical evaluation of accuracy and precision.
Raphel CF.A flexible fiberoptic endoscope was used to examine the upper respiratory tract of 479 horses and 41 (8.6%) had abnormalities. Pharyngeal lymphoid hyperplasia (PLH) was found in 141 horses (29.5%). Statistical analysis showed a relationship between the age of the horse and the prevalence of PLH. Sixteen (3.3%), 10 (2.1%), and 6 (1.3%), of the horses had laryngeal hemiplegia, epiglottic entrapment, and dorsal displacement of the soft palate, respectively. There was no association between the age of the horse and the prevalence of any of these abnormalities; nor was there a positive correlation ...
Raphel CF, Soma LR.Thoroughbred horses (n = 191) were examined with a flexible fiberoptic endoscope within 2 hours of racing on a dirt track; 147 (75.4%) had evidence of exercise-induced pulmonary hemorrhage (EIPH), and 13 (9.0%) had blood at the nostrils. Of 107 Thoroughbreds examined within the same period after breezing, 41 (38.3%) had evidence of EIPH. One horse (2.4%) of this group had blood at the nostrils. Statistical analysis of frequency data showed that a relationship existed between EIPH and the horse's age or distance raced or breezed. Relationship did not exist between EIPH and sex or finishing posi...
Rose RJ.Blood counts and noradrenaline estimations were performed in 14 horses competing in a 160 km endurance ride. Samples were collected before the ride, immediately after the ride. 30 minutes after the ride and the day after the ride. For statistical analysis, a group of seven horses that completed the ride at a mean speed of 234 m/minute (fast group) was compared with seven horses that completed the ride at a mean speed of 144 m/minute (slow group). Immediately after the ride the fast group of horses had higher packed cell volume, haemoglobin, neutrophils and lower lymphocyte counts than the slow...
Strigazzi A, Bianchi M.The dimensional distributions of the adipocytes in Equus caballus in many subjects and in many regions have been studied: such distributions turn out to be in good approximation galtonian ones. Furthermore, all the logarithm populations of the cell diameters have significantly the same variance. The used statistical methods (ANOVA two way with replications, and TUKEY -test) indicate an extremely significant different among the various regions (the smallest cells are in the supra-orbital fossa, the greatest ones are in the abdominal subserous floor).
Dusek J, Munk Z.In a set of mares of English Thoroughbred horse of the Napajedla stock the gravidity length in the time period from 1880 to 1972 was evaluated. The variability of the gravidity length was evaluated in sets which were put together by combination of two age groups with a division of the studied time period into ten-year stages. Variance and sample means of the gravidity lengths in these sub-groups are significantly different in the period under study. In order to eliminate the action of non-genetic influences qualifying the variability of the gravidity length, and to increase the objectivity of ...
Webb AI, Weaver BM.The solubilities of halothane at a concentration of 0.77% v/v in 5% carbon dioxide in air at 37 degrees C were determined for a variety of equine tissues. The mean values for the tissue/gas partition coefficients for visceral tissue taken from 36 horses were 5.42 for whole brain, 4.82 for grey matter, 7.41 for white matter, 4.18 for myocardium, 2.76 for lung, 8.51 for liver, 3.21 for kidneys, 2.66 for gastrointestinal tract, 1.77 for blood and 2.45 for spleen. The mean coefficients for eight different muscles taken from 23 horses ranged from 2.43 for extensor carpi radialis to 4.91 for psoas m...
Pascoe JR, Ferraro GL, Cannon JH, Arthur RM, Wheat JD.Of 235 Thoroughbred racehorses examined with a flexible fiberoptic endoscope within 2 hours of racing to determine the frequency of exercise-induced pulmonary hemorrhage (EIPH), 103 (43.8%) had various degrees of hemorrhage in the tracheal lumen. Two of these horses (0.8%) subsequently had blood flow from the nostrils. Blood seemed to originate from the lung. Statistical analysis of frequency data for 191 horses which finished in 1st, 2nd, and 3rd places did not show any relationship between EIPH and horse's age, sex, or finishing position. However, a trend toward an increased frequency of EIP...
The Journal of heredityJanuary 1, 1981
Volume 72, Issue 1 65-66 doi: 10.1093/oxfordjournals.jhered.a109433
Dring LA, Hintz HF, Van Vleck LD.Average gestation periods for bay, chestnut, dark bay, gray, and black Thoroughbred mares were compared. A total of 1359 gestation periods were used. A linear model including factors for age of mare, sex of foal, month and year of breeding, and sire effects was used in the analysis. Dam and sire coat-color combinations were also investigated in a similar manner. No significant differences in gestation length could be attributed to coat color of the mare of to dam and sire coat-color combinations. Heritability of gestation length was estimated to be 0.38. The results of this study strongly sugg...
Camici G, Manao G, Cappugi G, Ramponi G.We have predicted the secondary structure of horse muscle acylphosphatase by the statistical method of Chou and Fasman. In addition, we have studied the circular dichroism spectra of the enzyme, obtaining values for comparison to the predicted results. Discrepancies were found for the alpha-helix content estimated by the two methods.
Reuber MD.Dichlorvos, 2,2-dichlorovinyl dimethyl phosphate, an organophosphate insecticide, is widely used for the control of agricultural, industrial, and domestic pests (Fig. 1) [1]. Dichlorvos is administered orally as an anthelmintic to swine, horses, cats, and dogs. It is applied by dermal application to cattle, goats, sheep, swine, and chickens to control fleas, flies, and mites. Cucumbers, radishes, lettuce, and tomatoes are treated with dichlorvos in greenhouses. Aerosols and strips are used for the control of ants, bedbugs, ticks, cockroaches, flies, mosquitoes, silverfish, spiders, and wasps. ...
Georgi JR, Rendano VT, King JM, Bianchi DG, Theodorides VJ.Albendazole was effective in destroying Strongylus vulgaris larvae in verminous lesions of the cranial mesenteric artery when administered as a 20% suspension by stomach tube to ponies. Fifty mg/kg body weight administered twice a day for 2 days caused death and gradual disintegration of larvae over a period of 3 to 6 weeks with mild toxic signs appearing in 3 of 11 ponies. Higher total doses of albendazole (50 mg/kg twice a day for 4 days and 25 mg/kg three times a day for 5 days) lead to more rapid disintegration of the larvae but fatal toxicity was observed in 3 of 6 ponies so treated. In a...
Lumsden JH, Rowe R, Mullen K.Reference hematology and biochemistry intervals are presented for a number of variables of clinical interest determined for blood samples obtained from 60 thoroughbred mares, 12 thoroughbred foals and 50 standardbred horses in training. The observations for each variable were examined for outliers and Gaussian distribution. Parametric analysis was used where the observations were Gaussian initially or after any of four transformations, otherwise nonparametric analysis was required for estimation of the 2.5 and 97.5 percentiles. Description of the sample collection procedures, laboratory method...
Gabel AA.During 1975 and 1976, 70 Standardbred horses with cunean bursitis-tarsitis were treated by cunean tenectomy or by more conservative approaches (rested, given corticosteroid injections in the cunean bursa and distal hock articulations, given an oral course of phenylbutazone, a combination of these) or were sold. In 1975, owners were urged to have cunean tenectomy done to horses that appeared to have potential to race well, and in 1976, the more conservative methods of management and treatment were recommended. Statistical analysis of racing performance data led to the conclusion that there was ...
Rose RJ, Ilkiw JE, Hodgson D.Thirty-one horses competing in a 100 kilometre endurance ride had electrocardiograms recorded before and after the ride from which the heart score of each horse was calculated. Blood was also taken to determine the packed cell volume (PCV) and total plasma protein (TPP) before the ride, after 60 kilometres (mid ride) and at completion of the ride. Statistical analysis of the heart scores showed that a faster group of horses had significantly higher heart scores than either a slower group or those eliminated due to inadequate recovery of heart rate. No horses developed electrocardiogram abnorma...
Rose RJ, Ilkiw JE, Hodgson D.Thirty-one horses competing in a 100 kilometre endurance ride had electrocardiograms recorded before and after the ride from which the heart score of each horse was calculated. Blood was also taken to determine the packed cell volume (PCV) and total plasma protein (TPP) before the ride, after 60 kilometres (mid-ride) and at completion of the ride. Statistical analysis of the heart scores showed that a faster group of horses had significantly higher heart scores than either a slower group or those eliminated due to inadequate recovery of heart rate. No horses developed electrocardiogram abnorma...
Coffman JR, Johnson JH, Tritschler LG, Garner HE, Scrutchfield WL.Fourteen horses (7 treated with orgotein and 7 treated with a placebo) with navicular disease were studied on a double blind basis. All 14 horses had clinical and radiographic evidence of navicular disease. Orgotein and the placebo were administered by juxtabursal injection. Of the 7 orgotein-treated horses, 3 responded but none of the 7 placebo-treated horses responded. The difference was statistically significant (P less than 0.05).
Webb AI, Weaver BM.The density of the following equine tissues was measured: white and grey brain matter, myocardium, lung parenchyma, liver, spleen, gastrointestinal tract and contents, renal medulla and cortex, muscle, fat, tendon and bone. Statistical analysis indicated that there were highly significant differences in the values for density between horses and between tissues within horses. Values for density of eight different muscles were obtained for 18 horses and these were shown to differ highly significantly between horses and between muscles within horses. The values for splenic density differed highly...
Chvátal O, Hanák J.Surface electric potentials of the heart of four horses were measured by use of unipolar leak with the so called central Wilson's clip; the measurements were performed on 95 precisely fixed places of the equine body. Potentials found out in this way were re-measured with bipolar leaks: the negative electrode was fixed in the place of the highest negative potentials, the positive electrode was gradually attached to places with the highest values of positive potentials. The largest potential differences when the negative electrode was placed in the region of the heart were obtained from the regi...
León CA.The purpose of this study was the identification of possible sequelae of the infection of human individuals with Virus of Venezuelan Equine Encephalitis (VEE). Special emphasis was laid on exploring neurological, psychological and behavioural aspects and particularly on the search for a possible association of the disease with epileptic phenomena, brain damage and/or mental deficiency. A four-year period of observation was conducted on a sample of children from El Carmelo (Colombia) where an epidemic of VEE took place in 1967. A group of seven children who presented the encephalitic type of th...
Augustinsson KB, Bartfai T, Mannervik B.The steady-state kinetics of the butyrylcholinesterase-catalysed hydrolysis of butyrylthiocholine and thiophenyl acetate were shown to deviate from Michaelis-Menten kinetics. The ;best' empirical rate law was selected by fitting different rate equations to the experimental data by non-linear regression methods. The results were analysed in view of two alternative interpretations: (1) the reaction is catalysed by a mixture of enzymes, or (2) the activity is due to a single enzyme displaying deviations from Michaelis-Menten kinetics. It was concluded that the second alternative applies, and this...
Reville A, Corrigan J, Pugh J, O'Connor S.This study aimed to: 1) examine fall and injury incidence in Irish horseracing between 2016 and 2024, 2) establish injury characteristics, 3) compare incidence rates between professional and amateur racing and 4) investigate changes in incidence rates over time. Methods: Descriptive epidemiology study. Methods: Fall and injury data was recorded by Irish Horseracing Regulatory Board (IHRB)-appointed medical doctors using a standardised injury report form at every Irish race meeting between 2016 and 2024. Fall and injury incidence, injury location and type of injury were reported with 95% Confid...
Abdullah , Bensmail H, Johnson JP, Bouhali O.Laminitis is a painful and potentially life-threatening inflammatory condition of the equine hoof, and its detection remains a major challenge in veterinary practice. Although several risk factors have been reported, the prediction of the onset of laminitis in a subclinical stage using routine clinical data is still limited. This study aims to address this gap by developing an interpretable machine learning (ML) framework for the prediction of the risk of laminitis in horses. A point-based risk scoring system was first constructed using multivariate logistic regression to quantify the contribu...
Williams Louie E, Suter B, Schwarzwald CC, Mitchell KJ.Criteria for arrhythmia classification in horses are insufficient, particularly when differentiating atrial premature complexes (APCs) from sinus arrhythmia (SA). This study investigated RR and PP interval changes between SA, APCs, and ventricular premature complexes (VPCs). Unassigned: 30 resting ECGs were reviewed: 10 each containing SA, APC, and VPC. Sequences of 10 RR and PP intervals were recorded for each arrhythmia (20 events/ECG). Percent RR and PP deviations were calculated (1) between sequential intervals (%ΔSEQPP and %ΔSEQRR, respectively) and (2) compared to averaged baseline int...
Weigt A, Brockmann A, Tetens J, Schmitt AO.Reliable phenotypes are essential for successful animal breeding programmes. Subjective phenotypic assessment may lead to under- or overestimation of heritability estimates and thereby affect the power of genome-based analyses. In Warmblood horses, conformation traits are commonly assessed using linear scoring, but its reliability has not been sufficiently quantified. Objective: In this study, we investigated inter- and intra-rater reliability of linear scoring of conformation traits in German warmblood horses. Methods: Professional equine breeding experts (e.g. breeding judges) completed an o...
Satué K, La Fauci D, Colomer-Selva R, Cravana C, Fazio E.Platelet indices provide valuable information on platelet activation, heterogeneity, and production kinetics, yet their physiological variability remains poorly characterized in horses. Although seasonal changes in platelet count have been described, the seasonal modulation of derived platelet indices in mares remains poorly understood. The aim of this study was to evaluate the seasonal variation of platelet count and derived platelet indices in clinically healthy mares from the Valencia region (Spain), and to assess their interrelationships. Forty clinically healthy Spanish Purebred mares (6-...
Vostra-Vydrova H, Moravcikova N, Kasarda R, Shihabi M, Druet T, Halvonik A, Hofmanova B, Dovc P, Zorc M, Molina A, Demyda-Peyrás S, Valera M....Baroque horses represent a distinctive group of breeds that emerged mainly between the 16th and 18th centuries, shaped by the demands of European royalty and their courts. Although recognised as separate breeds, they share common ancestry, breeding goals, and historical gene flow. This study aimed to evaluate their genomic diversity, population structure, and admixture patterns. We analysed 1 160 individuals from eight breeds - Lipizzan, Old Kladruby Horse, Pura Raza Española, Lusitano, Friesian, Criollo, Peruvian Paso, and Puerto Rican Paso Fino - using 34 026 single-nucleotide polymorphis...
Santana ML, Bignardi AB.Reining performance is influenced by subjectivity and competition structure, challenging genetic evaluation. This study estimated genetic parameters for reining performance in Brazilian Quarter Horses using random regression models (RRM) and evaluated how alternative phenotypic definitions affect genetic inference and predictive ability. A dataset comprising 21,165 longitudinal records from 1603 horses was analyzed, comparing within-group rank (RANK) and Blom-transformed rank (BLOM). Model comparison indicated that cubic RRM provided the best fit for both phenotypes. Heritability estimates wer...
Nolen-Walston RD, Lowndes CR, Kulp JC, Luethy D, Stefanovski D, Van Eps AW.Total adiponectin (TA) is a marker of metabolic health in equids, with values below a critical decision point of < 7.9 μg/mL conferring increased risk of laminitis. Objective: To evaluate an IT assay to measure serum [TA] in equids and to assess its correlation with [high molecular weight adiponectin] (HMWA) measured by ELISA. Methods: Total serum adiponectin concentrations from 207 adult horses were measured using both an IT assay for TA and HMWA using a previously validated ELISA assay. Data were analyzed using Spearman correlation and Passing-Bablok regression. Intra- and inter-assa...
Santana ML, Bignardi AB.Barrel racing performance reflects a complex interplay among genetic merit, rider ability, training strategies, and competition-specific conditions. In practice, events differ substantially in their economic scale, and prize money can serve as a proxy for management intensity, rider expertise, and selection pressure. Objective: This study investigated whether economic stratification, represented by total prize money per event, is associated with changes in (co)variance components for barrel racing time in Brazilian Quarter Horses. Methods: A reaction-norm model was implemented using 349,262 ra...
Ferme T, Zorc M, Cotman M, Mesarič M, Dovč P.In this study, we analysed genetic diversity, population structure and inbreeding in the Lipica Stud Farm population by integrating pedigree records, microsatellite (STR) and genome-wide SNP data generated using the GGP Equine 70K BeadChip. The dataset comprised 233 horses from the Lipica Stud Farm, which served as the reference population for comparisons of diversity estimates based on pedigree-, STR- and SNP data. The STR data were originally generated for routine parentage verification and were included here to compare inbreeding estimates based on pedigree, STR and genome-wide SNP data. Pe...
Latorre N, Gómez-Cuétara C, Cañizares E, Crespo F, Pérez-Aguilera V, Laborda-Gomariz JÁ, Soler AJ, Sanchez-Rodriguez A, Roldan ERS.The growing relevance of the Purebred Spanish horse has driven the extensive use of assisted reproductive technologies to preserve elite stallion genetics. Optimal reproductive performance is intrinsically linked to systemic health and high semen quality. This study aimed to evaluate the impact of body condition on the stallion's metabolic and endocrine profiles and their seminal parameters. Semen and blood samples were collected from 26 stallions (February-May in 2024-2025) whose body condition score (BCS) was assessed using the Henneke scale. They were classified into two groups, low BCS wit...
Kuroda T, Minamijima Y, Takahashi Y, Ebisuda Y, Yoshida K, Ishikawa H, Ishihara KI, Mita H, Nomura M, Nukada T, Ishikawa Y.Quinidine has long been used for the pharmacological treatment of atrial fibrillation (AF) in horses; however, the plasma concentration required for conversion to sinus rhythm remains unclear. Dominant frequency (DF), derived from surface electrocardiograms, reflects atrial activation rate during AF. This study aimed to quantify the relationship between plasma quinidine concentration and DF using a pharmacokinetic/pharmacodynamic (PK/PD) approach. Ten Thoroughbred horses with naturally occurring AF received quinidine sulfate via a nasogastric tube. Plasma quinidine concentrations and DF values...
Waples RS, Khanshour AM, Cothran EG.Standardbred horses are widely used for harness racing in North America, Europe, Australia, and New Zealand. In the U.S., two gaits (Pacers and Trotters) are genetically differentiated at a level typical for different horse breeds. We used the complete pedigree for all registered American Standardbred foals born 1970-2014 (>200 K Trotters and > 500 K Pacers) to calculate annual and lifetime reproductive skew and its consequences for the effective number of breeders per year (Nb) and effective size per generation (Ne). With rare exceptions, females can only produce 0 or 1 foal per year, w...
Moore-Colyer M, Harris P, Daniels S.Haylage is widely fed to all categories of stabled horses across Europe and New Zealand. Haylage can vary from high energy nutrient dense forage to low energy highly fibrous fodder, yet little is known about the impact different haylages have on metabolism in horses. This study provides the first direct comparison of feeding four different haylages: early cut (Lolium multiflorum), later cut (Lolium perenne) rye grass (R1 and R2); early and late cut meadow grass (M1 and M2), on urinary and faecal metabonomics, in ponies at maintenance. Using replicated Latin Square design, eight individually ho...
Regnault N, Olivier A, Pycik E, Bideau N.Show jumping performance depends on the rider's ability to regulate the horse-rider system while maintaining postural stability under dynamic constraints. Although rider biomechanics has been investigated in various equestrian contexts, integrated analyses combining 3D kinematics with rein and stirrup kinetics during jump-approach remain limited. This study aimed to analyse how approaching an obstacle changes a rider's control strategies by comparing sitting canter, two-point canter in straight line without obstacle and jump-approach canter (defined here as the five strides before obstacle) in...
Tanner JC, Beatson PR, Hickford JGH, Barrell GK.This study was conducted to quantify the probability of a Standardbred foal attaining early career milestones and to estimate some environmental and genetic factors that influence achievement of those milestones. Data for all Standardbred foals registered at birth in New Zealand from 1995 to 2018 were used to estimate variance components and fixed effects influencing attainment of three early-career traits; registered with trainer (REG), starting in a trial (TRIAL) and starting in a race (RACE). The study population comprised 65,256 foals. Of these, 65.5% attained REG, 55.4% progressed to TRIA...
Shah MH, Roshan D, Pugh J, Murray J, Fuller C, Kung S, Reville A, O'Connor S.Despite horse racing's exceptionally high concussion risk, there is no jockey-specific ImPACT study. This work aimed to develop demographically adjusted, jockey-specific ImPACT norms and to evaluate complementary approaches to clinical classification. Unassigned: Retrospective baseline data from 663 Irish jockeys (2021-2024) were analyzed. Two normative methods were applied: (i) a univariate regression-based approach estimating expected scores for each cognitive domain independently, adjusting for age, sex, and education, with percentile-based classification; and (ii) a multivariate regression...
Stapley E, Lowndes C, Inanc E, Gillespie-Harmon C, Waxman S, Farr A, van Eps A, Bertin FR.Variables associated with hormonal, clinical, and survival outcomes of equids with pituitary pars intermedia dysfunction (PPID) are incompletely investigated. Objective: Evaluate the effect of initial hormone concentrations, clinical signs, treatment, and owner-related variables on outcomes in horses and ponies with PPID. Methods: Medical records from 213 horses and ponies diagnosed with PPID by 2 university-based primary care practices. Methods: Analytical observational cohort study. Variables associated with adrenocorticotropic hormone normalization, clinical improvement, and survival after ...
Perdomo-González DI, Valera M, Molina A, Azor P, Sánchez JP.Dominance is a non-additive genetic effect involving allele interaction at the same locus. In animal breeding, it has often been ignored due to its complexity and the low accuracy of pedigree-based estimates. This study analysed dominance variance components for reproductive traits [age at first foaling (AFF), reproductive efficiency (RE), interval between first and second foaling (I12)] and morphological traits [scapulo-ischial length (SIL), dorsal sternal diameter (DSD), knee circumference (KC)] in Pura Raza Española (PRE) mares. The aim was to assess the magnitude of dominance effects acro...
Lutvikadic I, Hopster K, Watkins AR.Mechanical power (MP) represents the ventilatory-delivered energy to the respiratory system, integrating multiple variables into a single parameter. It has been linked to ventilator-induced lung injury and post-ventilation complications in human medicine, while clinical relevance in equine anesthesia remains insufficient. Objective: To evaluate the association between intraoperative mechanical power and postoperative respiratory outcomes in horses undergoing inhalant anesthesia. Methods: This retrospective cohort study analyzed anesthesia records from 843 adult horses anesthetized between 2023...
Prémont A, Moiroud C, Jacquet S, Beaumont A, Bertoni L, Chateau H, Audigié F.To quantitatively describe changes in skeletal radiopharmaceutical uptake during a training program including swimming in horses with neck and back pain, eighteen showjumping horses with documented vertebral lesions were prospectively included in a training program composed of 4 weeks of ridden work and then 8 weeks combining swimming and ridden exercise. Previously published data on this cohort did not demonstrate any clear change in thoracolumbar mobility. Bone scintigraphy was performed at the 4th and 12th weeks. Radiopharmaceutical uptake was quantified in 205 regions of interest (ROIs) an...
Hickey C, Guedes A, Byrne J, Hatschbach E, Walters B, Rendahl A, Tearney C.Defining the reliability of oscillometry (NIBP) for measuring mean arterial pressure (MAP) during normotension and hypovolaemic hypotension could help with cardiovascular monitoring and management in horses anaesthetised in dorsal recumbency. Objective: To assess agreement between NIBP and invasive MAP during normotension and hypovolaemic hypotension in dorsally-recumbent, anaesthetised horses. Methods: Prospective experimental study using 11 horses. Methods: Under isoflurane anaesthesia, blood was removed at 5 mL/kg bwt increments up to 25 mL/kg bwt and returned in a similar fashion. Pair...
Cardiac arrhythmias are frequently detected during routine auscultation in athletic horses. Assessment of their clinical significance requires electrocardiography (ECG) to analyze waveforms and intervals. In recent years, portable ECG devices have been introduced to simplify electrocardiographic examination, offering advantages such as ease of use and the ability to review results via a smartphone. This study evaluated the utility and accuracy of a portable ECG device compared with a standard electrocardiograph. Simultaneous ECG recordings were obtained from 28 healthy adult horses at rest usi...
Alkhamees ASA, Cavalleri JV, Hammer SE.Understanding the immunogenetic structure of the major histocompatibility complex (MHC) in Arabian horses helps to clarify the population health structure-related phenotypes of this historically influential breed. Straight Egyptian (SE) Arabian horses, which fall under , are of global value but are limited in number, raising concerns about their distribution and the genetic diversity associated with immunity. In this study, we examined 57 Egyptian Arabian horses from two breeding programs: one in Germany (AR-DE) and the other in Qatar (AR-QA). Sixteen polymorphic intra-MHC microsatellite marke...
Lindroth KM, Müller CE.Measurements of pH-value in equine faeces are often performed in studies on nutrition and health in horses, but a standard protocol for it is lacking despite the knowledge that different sample handling may affect the pH-value. Sample handling prior to pH-measurement is often determined by practical settings and has been reported to vary in published studies within the area. The purpose of the current study was therefore to investigate the influence of different combinations of storage time and temperature on the pH-value in equine faecal samples in comparison to immediate pH-measurement at de...
Ripley NE, Gravatte HS, Reinemeyer CR, Nielsen MK.Habitat preferences of gastrointestinal nematodes are well-documented in small hosts, but equine cyathostomin diversity has largely been characterized only at farm or regional levels. While organ-level site preferences are known, within-organ spatial distributions remain unexplored. We investigated the longitudinal and radial distribution of adult cyathostomins within the large-intestinal lumen. Intact large intestines from 5 Shetland ponies were frozen post-necropsy and transected into 4-cm sections. Three micro-habitat samples (2.5 cm diameter) were collected per section. We recovered 2,444 ...
Perzyna M, Bardet E, Baranowska K, Kiełbik P, Puchalska M, Pawliński B, Witkowska-Piłaszewicz O.Serum amyloid A (SAA) is a major acute phase protein used as an inflammatory biomarker in equine medicine. However, no universally accepted assay-specific reference interval (RI) exists for donkeys, and available literature remains limited, with only few studies using different donkey breeds and immunoassay platforms. This study aimed to establish an assay- and population-specific RI for serum SAA in apparently healthy donkeys using a species-specific double sandwich ELISA. Unassigned: Serum SAA concentrations were measured in 176 apparently healthy donkeys. RI estimation followed ASVCP/CLSI r...
Selim A, Marzok M, Gattan HS, Alruhaili MH, Ismail H, Almubarak AI, Hereba AM.Equine strongylosis is one of the most prevalent gastrointestinal parasitic diseases affecting horses and donkeys worldwide, leading to reduced health, productivity, and working performance. This study aimed to determine the prevalence of gastrointestinal strongyle infection and identify associated risk factors among equines in three Egyptian governorates. Unassigned: A cross-sectional study was conducted on 540 horses and donkeys. Fresh fecal samples were collected and examined using the magnesium sulfate flotation technique for the detection of strongyle eggs. Associations between infection ...
Perina F, Lanci A, Fanelli D, Maltinti S, di Caporiacco L, Castagnetti C, Mariella J.The aims of the study were to evaluate factors influencing the resumption of postpartum ovarian activity and to compare hormone concentrations among mares with physiological/pathological postpartum period and cyclic non-lactating mares. Follicular dynamics were monitored ultrasonographically in 38 postpartum mares from foaling or admission (Tpp/Ta) every other day until the emergence of a dominant follicle (Td), then daily until ovulation (To). Blood samples were collected at Tpp/Ta, Td, and To in postpartum mares and at Td and To in cyclic mares to determine serum estradiol, progesterone, lep...
Ablondi M, Danese T, Moretti R, Asti V, Ozella L, Sabbioni A, Valle E, Summer A.Genetic improvement of show-jumping competition results has a clear breeding goal which is to produce horses that can repeatedly clear technically demanding courses at maximum height, resulting in placement results. However, how to achieve this, and thus how to accurately choose breeding candidates, is far from straightforward due to the heterogeneity of competition outcomes. In this study, we analyzed Fédération Équestre Internationale (FEI) competition records from 19,232 horses together with pedigree data to evaluate novel phenotypes suitable for international genetic evaluations. Tradit...
