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Molecular prevalence of equine herpesvirus type 1 and equine herpesvirus type 4 in thoroughbred and Arabian horse facilities in Türkiye. Equine herpesvirus-1 and -4 are contagious viruses causing respiratory disease and reproductive losses in horses. This study aimed to determine the prevalence of EHV-1 and EHV-4 in eight Turkish stud farms using RT-PCR analysis of nasal secretions, uterine fluids and aborted foal tissues. Deep nasal swabs were collected from 443 horses showing acute-onset fever and/or clinical signs of respiratory disease. Additionally, uterine swabs and tissue samples (lung, liver, spleen, thymus, kidney, heart) were obtained from 152 abortion cases. Among symptomatic horses, EHV-1 DNA was found in 2 cases (0...
Genetic variability and associations of Trakehner and other horse populations in Lithuania. To obtain genetic parameters relevant for the management of animal genetic resources, this study provides a comparative characterization of the Trakehner (TRAK) horse population in relation to four other horse populations maintained in Lithuania - Arabian (ARAB), Baltic Warmblood (BW), Lithuanian Warmblood (LW), and Zemaitukai (ZEM). These populations represent diverse histories, selection goals, and breeding practices. Pedigree data ( 22 666) and parentage verification genetic data based on blood group markers ( 1293) were used to evaluate genetic diversity, population structure, and inter-...
Cross-protective effect of a multicomponent fusion protein vaccine during a natural episode of Streptococcus zooepidemicus respiratory disease in ponies. Streptococcus equi subspecies zooepidemicus is a highly diverse opportunistic pathogen of horses, associated with respiratory disease and endometritis. Objective: To characterise S. zooepidemicus isolates recovered from young ponies during a natural episode of respiratory disease, and to determine if vaccination with Strangvac®, a vaccine against Streptococcus equi subspecies equi, conferred cross-protection. Methods: Retrospective analysis of a double-blinded placebo-controlled study involving 32 ponies (16 vaccinates and 16 placebo controls) that experienced a natural episode of respiratory...
Ovum pick-up in mares: Evidence review and best practice recommendations using a modified GRADE approach. Ovum pick-up (OPU) is a procedure that is now performed in mares worldwide to harvest oocytes for in vitro embryo production. There is a lack of consensus surrounding best practices for various procedural elements of the technique and recently there has been an increasing focus on the welfare aspects of the procedure. Our objective was to summarize current practice and to develop guidelines for OPU in the mare, using a modified GRADE approach to optimize efficiency and mare welfare. Published evidence on various aspects of the procedure was compiled, and to supplement the relative lack of publ...
Cerebral arterial mapping in the equine brain: a detailed anatomical study. Detailed knowledge of the cerebral arterial system in equine brain is required for advancing neuroanatomical understanding and supporting the interpretation of neurological disorders. The equine cerebrum, characterized by extensive cortical organization and functional specialization, requires a continuous arterial blood supply; however, detailed information on its arterial anatomy remains limited. This study aimed to describe the arterial supply to the equine cerebrum, including the origin, branching patterns, and distribution of the major cerebral arteries. Unassigned: Ten adult horse heads w...
Research Trends and Emerging Frontiers in Racehorse Genetics: A Bibliometric Analysis. The global horse racing industry relies heavily on elite breeding. Therefore, a molecular understanding of athletic traits is crucial for the industry's advancement. This study utilized Bibliometrix, VOSviewer, and CiteSpace to conduct a comprehensive bibliometric analysis of 869 publications in the Web of Science Core Collection (2011-2025), decoding the academic landscape and evolutionary trajectory of equine genetics. The results indicate a significant upward trend in academic output since 2019, with the United States, South Korea, and the United Kingdom emerging as the primary contributors...
Case Report: Oral and topical chronic administration of THC-rich and CBD-rich cannabis oil as palliative care in a rescued horse with open wound, sarcoid and chronic pain. Cannabinoid-based therapies have shown analgesic, anti-inflammatory, and wound-healing potential across veterinary species; however, clinical data on long-term use of THC-rich formulations in horses remain scarce. This case report describes the use of combined oral and topical THC-rich and CBD-rich full-spectrum cannabis oils as part of a palliative care strategy in a rescued horse with severe chronic disease. A senior mixed-breed gelding was rescued with a large, chronic ulcerative lesion of the left hind limb, severe malnutrition, non-weight-bearing lameness (AAEP grade 5/5), and refractory ...
Short-interval longitudinal analysis of immune cell dynamics in heavy draft foals after colostrum intake. Maternal cells and antibodies are present in equine colostrum, but their relationship with immune cells in foals after colostrum ingestion remains unclear. This study longitudinally analyzed immune cells in the peripheral blood of neonatal foals at short intervals and investigated their relationship with colostral immune cells. Eleven clinically healthy draft mares and their foals were examined. Foal blood was collected before colostrum intake (0 hr) and at 2-3, 6, 12, 36-48 hr, and 3 and 7 days after ingestion. Mare blood and milk (0, 36-48 hr; 0 hr milk defined as colostrum) were also collec...
Use of computer-assisted tomography for diagnosis and standing surgical reduction of progressive ethmoidal hematoma in a mare. Progressive ethmoidal hematoma (PEH) is a rare, nonneoplastic mass occurring in the sinonasal passages of horses. An 11-year-old, pregnant Thoroughbred mare was presented with a history of intermittent nasal discharge and stertorous respiration. On examination, radiography revealed increased opacity in the sinus and nasal cavities and endoscopy identified a mass emerging from the left ethmoidal turbinate. Computed tomography (CT) showed the range and origin of the mass, indicative of PEH. A standing frontonasal flap was made under sedation, following temporary tracheostomy to secure the airway...
Vitrification of in vivo produced equine embryos: Size really does matter! Vitrification rather than slow-freezing has become the method of choice for the cryopreservation of in-vivo produced embryos. It is a simple technique that does not require a programmable freezing machine and relies chiefly on placing the embryo on a surface, rather than within a straw, in a small volume of vitrification solution to achieve extremely rapid cooling rates. However, in the field of equine embryo vitrification size truly does matter. Methodologies for both vitrification and warming prior to transfer are largely dictated by the size of the embryo. Since embryo size is directly rela...
Infection by Strongylus edentatus and Strongylus vulgaris in a warmblood crossbred foal in Ontario. A 6-month-old warmblood-cross filly was presented to the Ontario Veterinary College Large Animal Hospital (Guelph, Ontario) because of acute profuse diarrhea unresponsive to treatment and severe wasting. The filly progressed to obtundation over 4 d and was euthanized. Postmortem examination revealed multifocal hemorrhage within the extraperitoneal fascia and diaphragm with intralesional, 4-centimeter-long, white nematodes. In addition, verminous arteritis of the cranial mesenteric artery, right colic artery thrombosis with segmental colonic infarction, ulcerative colitis, and segmental fibrino...
Oclacitinib for Controlling Pruritus and Associated Skin Lesions in 16 Horses With Allergic Dermatitis. Oclacitinib is a Janus kinase inhibitor approved for the treatment of pruritus associated with allergic dermatitis in dogs and may be effective in horses. Objective: To evaluate the efficacy of oclacitinib in reducing pruritus and skin lesions in horses with allergic dermatitis. Methods: Sixteen horses aged ≥ 18 months. Methods: Horses received oclacitinib at 0.25 mg/kg orally once daily for 21 days. Changes in haematological and biochemical parameters were measured on Day (D)0 and D21. The owners were instructed to evaluate the horses using the pruritus Visual Analog Scale (PVAS) on...
Embryo developmental kinetics and vitrification in relation to pregnancy outcome, foaling percentage and foal sex. While fast in vitro embryo development has been associated with improved outcomes, the relationships of slow in vitro embryo development and vitrified versus fresh in vitro produced (IVP) embryo transfer to foaling percentage and foal sex are less explored. Objective: To determine the relationships of (1) day of blastocyst formation (D7-11 after intracytoplasmic sperm injection (ICSI)) and (2) vitrification and warming method (one- and three-step) versus fresh transfer with pregnancy, early pregnancy loss (EPL), foaling percentage and foal sex. Methods: Retrospective clinical study. Methods: B...
Development of a prognostic scoring system for systemic inflammatory response syndrome in donkeys. Systemic inflammatory response syndrome (SIRS) is associated with increased mortality in horses with gastrointestinal (GI) disease. However, there are no data relating to naturally occurring SIRS in donkeys. Objective: To determine SIRS frequency in donkeys with GI disease. To develop a donkey-specific prognostic SIRS score. Methods: Retrospective case series. Methods: Clinical records from donkeys presenting with GI disease in two independent cohorts (development cohort: n = 400, UK; validation cohort: n = 36, Australia) were reviewed. Age, sex, heart rate, respiratory rate, rectal te...
Laser neoureterocystostomy to treat ectopic ureters. Ureteral ectopia is an uncommon but clinically important congenital abnormality in horses. If left untreated, it can lead to persistent dermatitis, urinary tract infections, and failure to thrive. Surgical correction is necessary, but traditional approaches have produced mixed results with high morbidity. Identification of a minimally invasive, effective technique would significantly improve prognosis. Objective: To describe the procedure and outcomes of cystoscopic guided laser neoureterocystostomy in three fillies. Methods: Case series. Methods: Retrospective review of three cases treated wi...
Roux-en-Y gastrojejunostomy and jejunojejunostomy for pyloric obstruction bypass in a horse and a foal. Gastric outflow obstruction in horses is a rare but challenging condition, often resulting from either congenital anomalies or acquired lesions such as chronic ulceration or pyloric polyps. Conventional surgical bypass procedures, including gastrojejunostomy (GJ) or gastroduodenostomy and less commonly duodenojejunostomy, can restore patency but may lead to postoperative complications. Objective: To describe the presentation, surgical management, and postoperative outcome of two horses-an adult and a foal treated with Roux-en-Y gastrojejunostomy combined with a side-to-side jejunojejunostomy (...
Renal Perfusion in Healthy Horses: A Feasibility Study With Contrast-Enhanced Ultrasound. This study assessed the feasibility of contrast-enhanced ultrasound (CEUS) for evaluating renal perfusion in horses and compared perfusion parameters between age groups. In a prospective study, eight healthy horses were divided into young (3-5 years, n = 4) and old (16-17 years, n = 4) groups. All animals underwent B-mode, Doppler ultrasonography, and CEUS of the right kidney after an intravenous bolus of SonoVue (0.02 mL/kg). Qualitative analysis assessed contrast kinetics, whereas quantitative parameters (peak intensity, time to peak [TP], area under the curve, and wash-out time) were o...
Cheek tooth extraction in geriatric versus non-geriatric horses. Age-related dental changes are major contributors to dental disorders in older horses, and cheek tooth extractions are often required to maintain masticatory function and oral comfort. However, limited information is available on clinical and treatment characteristics in this older patient population. Objective: To describe clinical features, treatments, complication rates and short-term outcomes of horses undergoing oral cheek tooth extraction and treatment of odontogenic sinusitis, and to compare findings between geriatric and non-geriatric horses. Methods: Retrospective analysis of clinical...
Prevalence of cardiac arrhythmias in poorly performing horses. Electrocardiogram abnormalities are common in racehorses and can affect performance. Unassigned: This study aimed to analyze the results of electrocardiographic problems and measure the frequencies of various cardiac arrhythmias. Unassigned: This cross-sectional study was conducted between September 2023 and August 2024. Standard electrocardiographic recordings were obtained from all horses, and cardiac troponin levels were measured. Out of the 114 poorly performing adult horses, 10 cases without arrhythmia were considered the control group. Seventy-four horses (64.9%) had at least one type of...
Herd-level occurrence and spread of Theileria equi and its associated ticks on an Austrian horse farm. Equine piroplasmosis (EP) is a tick-borne disease caused by the blood parasites Theileria equi, Theileria haneyi, and Babesia caballi transmitted primarily by hard ticks (Ixodidae). The clinical courses of EP range from asymptomatic to severe, and chronic infections for several years support the transmission among hosts. Methods: Over a period of two years, blood and fecal samples were taken from horses (n = 18) on a single farm in eastern Austria, starting with the first confirmed case of T. equi infection. Hard ticks (n = 1525 of Ixodes ricinus, Dermacentor reticulatus and Haemaphysalis ...
Estimating the economic value of working donkeys in Ethiopia. There is limited empirical evidence on the quantitative economic contribution of donkeys to livelihoods, leading to their undervaluation and exclusion from policy. Here an enterprise budget analysis is embedded within a stochastic dynamic population model for three production systems in Ethiopia to evaluate system inputs, outputs and the economic contribution of donkeys. The model was parameterised using data from household surveys, focus group discussions and key informant interviews, supplemented by literature. The economic value of donkeys' (unpaid) homestead and agricultural services was e...
Evaluation of two point-of-care molecular diagnostic platforms for rapid detection of equine Hendra virus. Hendra virus (HeV) is a lethal zoonotic pathogen endemic to eastern Australia, posing significant risks to equine and human health. Rapid field detection of HeV enables timely intervention and outbreak management. This study evaluated candidate point-of-care (POC) molecular diagnostic platforms for HeV detection in equine samples: including a loop-mediated isothermal amplification (DARQ RT-LAMP) assay and real-time reverse transcription quantitative polymerase chain reaction (RT-qPCR). Comparative analytical evaluation demonstrated that RT-qPCR exhibited superior analytical sensitivity relativ...
Integrative Metabolomic and Echocardiographic Profiling Reveals Metabolic-Cardiac Structural Coupling in Yili Horses During Incremental Exercise. This study integrated echocardiography with widely targeted metabolomics to decipher how plasma metabolic dynamics couple with cardiac geometry in Yili horses during incremental treadmill exercise. Nine speed-type horses underwent a graded exercise test (6% incline; 0 to 9 m/s). Jugular venous blood samples collected at rest (0 m/s) and at 3, 5, 7, and 9 m/s were profiled by LC-MS, and Pearson correlation analysis was applied to relate differentially expressed metabolites (DEMs) to twenty echocardiographic structural indices. A core set of 314 shared DEMs (124 upregulated, 190 downregulated) w...
Management of Equine Post-Extraction Cheek Tooth Alveoli: Application of Alveolar Plugs. Preservation of dentition remains the primary goal of equine dentistry; however, cheek tooth extraction is required in cases of severe dental pathology. Following tooth extraction, management of the post-extraction alveolus remains a significant clinical challenge due to its large size and susceptibility to contamination with feed material and bacteria. To mitigate these risks, alveolar plugs are commonly used to protect the alveolus, stabilize the blood clot, and support granulation tissue formation. This review summarizes the current case reports and research articles regarding the use of al...
Pathology of sudden death in racehorses: a review. Sudden death (SD) is the second most important syndrome associated with death in racehorses. The cause of SD in a large number of horses remains undetermined, and, in many of these cases, causes are not found by gross or microscopic postmortem examinations. Among the known causes of SD are traumatic injuries, including fractures of skull, neck, and pelvis; intoxications (e.g., anticoagulant rodenticides); and others. For many cases of SD in which no significant lesions are found, heart failure, probably associated with arrhythmias, is suspected. Precise phenotypic characterization of SD in hor...
Efficacy of 0.5% Tretinoin in the Treatment of Equine Aural Plaques. Equine aural plaques are a benign form of auricular papillomatosis caused by equine papillomavirus. Despite the efficacy of 5% imiquimod cream, a marked local reaction is frequently observed during therapy, often requiring sedation before application. Objective: The aim of this study was to evaluate the efficacy and potential adverse effects of 0.5% topical tretinoin in the treatment of equine aural plaques. We hypothesised that tretinoin would be effective, with fewer adverse effects compared to imiquimod. Methods: The study included 10 horses of both sexes, aged between 7 months and 15 y...
Recent Advances in Natural Products for Colitis: Mechanisms and Translational Perspectives. Colitis is a chronic relapsing inflammatory disorder characterized by persistent mucosal inflammation, epithelial barrier disruption, oxidative stress, immune dysregulation, and gut microbiota imbalance. Although current therapies have improved disease management, their long-term use is still limited by incomplete response, relapse, adverse effects, and high cost. Natural products have attracted increasing attention as promising candidates for colitis intervention because of their structural diversity, broad bioactivity, and multitarget regulatory potential. In veterinary medicine, colitis and...
Effects of three equine-related training modalities on inhibitory control in children aged 7-8 years: an exploratory randomized controlled trial. Horseback riding training (HRT), horseback riding simulator training (HRST), and horse companion training (HCT) can improve physical fitness, cognitive abilities, and emotional well-being. However, their effects on inhibitory control (IC) are not well studied. Unassigned: This exploratory randomized controlled trial examined the effects of HRT, HRST, and HCT on IC in children aged 7-8 years and analyzed brain neural mechanisms using functional near-infrared spectroscopy (fNIRS). Twenty-four children aged 7-8 years from Maple Leaf International School-Xi'an were randomly divided into three grou...
Horse species symposium: Current and future outlook on equine industry, research trends, and opportunities: How to promote a sustainable field into the future. The equine industry represents a complex and evolving sector with substantial economic, social, and scientific significance, yet it faces growing challenges related to funding constraints, societal expectations for animal welfare, regulatory pressures, and rapid scientific and technological change. This article synthesizes perspectives presented at the 2025 Horse Species Symposium, held during the joint Annual Meeting of the American Society of Animal Science and Canadian Society of Animal Science, which convened experts from academia, government, and industry to evaluate the current state and...
Equine-assisted coaching in formerly incarcerated men with histories of substance abuse: a 12-week exploratory study of anger regulation, quality of life, human-horse synchrony, and equine behavior. Equine-assisted interventions are increasingly used as complementary approaches to support psychosocial functioning, yet empirical evidence in justice-involved populations with histories of substance abuse remains limited. The present exploratory quantitative study examined the effects of a 12-week equine-assisted coaching program on anger regulation, quality of life, and human-horse synchrony in formerly incarcerated men, while also monitoring equine behavioral responses from a One Health perspective. Eleven male participants residing in a residential reintegration facility in the Netherlands...
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