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Topic:Equine Health

Equine health encompasses the study and management of diseases, disorders, and overall well-being of horses. It involves understanding various physiological systems, preventive care, and treatment strategies to maintain optimal health in equine populations. Common areas of focus include nutrition, infectious diseases, orthopedic conditions, and reproductive health. Research in equine health aims to advance knowledge on diagnostic methods, therapeutic interventions, and management practices that improve horse welfare and performance. This page collects peer-reviewed research studies and scholarly articles that explore the diverse aspects of equine health, offering insights into current findings and advancements in the field.
Efficacy of Ozone Bagging Therapy in Equine Chronic Distal Limb Wounds: Clinical Evaluation of Eight Cases.
Veterinary sciences    December 23, 2025   Volume 13, Issue 1 16 doi: 10.3390/vetsci13010016
Repciuc CC, Oros NV, Mureșan ȘMC, Sevastre B, Joaquim JGF, Oana LI.Limb wounds in horses represent a significant therapeutic challenge due to poor vascularization, reduced skin elasticity, and high risk of complications such as exuberant granulation tissue. Conventional treatments sometimes fail to provide satisfactory healing outcomes, leading to prolonged recovery and increased costs. This study aimed to evaluate the efficacy of topical ozone therapy using the bagging method in promoting the epithelialization and contraction of chronic distal limb wounds in horses refractory to conventional management. Eight horses, aged 3-21 years, with chronic wounds aver...
Changes in Fitness Parameters in Ridden Trained Showjumping Horses After Healing of Gastric Ulcers: Preliminary Results.
Veterinary sciences    December 21, 2025   Volume 13, Issue 1 9 doi: 10.3390/vetsci13010009
Busechian S, Di Salvo A, Orvieto S, Rueca F, Villella C, Sollevanti G, Pieramati C, Nisi I, Della Rocca G.Equine Gastric Ulcer Syndrome (EGUS) is a worldwide disease described in different categories of animals. A causal relationship between exercise and EGUS has been suggested, attributed to stress as well as physiological changes in the position of abdominal organs, especially during trot and gallop. EGUS can influence athletic fitness, as has been described in various papers on racehorses. The aim of this work was to determine if gastric ulcer healing is associated with changes in selected fitness parameters (i.e., speed, heart rate during exercise and recovery, stride length and frequency) in ...
Effects of hypoxia and hyperoxia on exercise-induced metabolomic and transcriptomic profiles in equine skeletal muscle.
The Journal of experimental biology    December 17, 2025   Volume 228, Issue 24 jeb250956 doi: 10.1242/jeb.250956
Takahashi K, Mukai K, Takahashi Y, Ebisuda Y, Sugiyama F, Hatta H, Kitaoka Y.To explore the molecular mechanisms underlying oxygen-dependent regulation of skeletal muscle adaptations, eight Thoroughbred horses performed 2 min of exercise at a velocity corresponding to 95% maximal O2 uptake under a normoxic condition, while using inspired O2 levels of 0.21 (normoxia), 0.26 (hyperoxia) or 0.16 (hypoxia). At the end of the exercise, arterial O2 saturation was significantly higher with hyperoxia and lower with hypoxia than with normoxia. However, no significant difference in plasma lactate or muscle glycogen concentrations was observed across the O2 conditions. A metabol...
A case of Setaria equina in a 13-year-old, UK-resident mare.
Veterinary parasitology, regional studies and reports    December 4, 2025   Volume 67 101400 doi: 10.1016/j.vprsr.2025.101400
Healy SR, Yaffy D, Miller HG.Setaria equina is a species of filarial nematode parasite transmitted by mosquitoes, which infects horses and other equids. Adult worms reside in the abdominal cavity with apparently little pathogenic significance, but larvae can migrate to other regions of the body with resulting clinical disease. Cases in the UK are rare, with the last published report in 2001. A recent case of S. equina infection was detected in a 13-year-old, UK-resident mare during postmortem examination in Hertfordshire, UK. Adult worms were collected from the abdominal cavity, their DNA extracted and subjected to PCR an...
Use of a Fogarty balloon catheter for management of distal nasolacrimal duct atresia in a standing sedated horse.
The Canadian veterinary journal = La revue veterinaire canadienne    December 1, 2025   Volume 66, Issue 12 1273-1278 
Bourassi S, Jack H, Florczyk A.A 4-year-old Arabian cross paint mare was referred for evaluation of chronic mucopurulent discharge and epiphora of the left eye. Ophthalmic and radiographic evaluations confirmed distal nasolacrimal duct atresia with absence of the nasolacrimal orifice. Initial minimally invasive treatments, including guidewire-assisted catheterization and diode laser photoablation, were unsuccessful. Definitive treatment was achieved using a Fogarty arterial embolectomy catheter under standing sedation. Controlled balloon inflation and deflation enabled progressive dilation of the obstructed duct, and a surg...
Treatment evaluation using ultrasonographic scanning of the spleen in Arabian horses affected by babesiosis.
Open veterinary journal    November 30, 2025   Volume 15, Issue 11 5799-5805 doi: 10.5455/OVJ.2025.v15.i11.35
Almaqhawi AA, El-Jalii IM, Al-Sabi MNS, Al-Ali A, Khalid AM, Abduljawad M, Shawaf T.Equine babesiosis is a widespread protozoan disease in Saudi Arabia. The most common finding of clinical babesiosis is splenomegaly, which can be detected using non-invasive splenic ultrasonography. Unassigned: This study aimed to investigate changes in the spleen size in horses infected with babesiosis using ultrasonography before and after treatment. Unassigned: This study employed 15 male and female Arabian horses. Each animal was examined clinically for clinical signs, and blood samples were collected in plain tubes to detect antibodies against . The spleens of healthy and affected horses ...
Emotional contagion in human-horse interactions: A pilot study investigating the role of stress and body language in emotional transfer.
Open veterinary journal    November 30, 2025   Volume 15, Issue 11 6050-6058 doi: 10.5455/OVJ.2025.v15.i11.60
Manolăchescu D, Tripon M, Crecan C, Tătaru M, Papuc I.Emotional contagion in human-horse interactions has been widely studied; however, the role of body language in stress transfer remains insufficiently explored. Unassigned: This study examines whether human emotional states, particularly stress and anxiety, influence horses and whether the transmission occurs primarily through body language. Unassigned: A repeated-measures within-subjects design was used. The order of interaction styles was randomized across subjects during 33 HCIs. Participants were categorized as high-anxiety (HA) or low-anxiety (LA) based on State Anxiety Scale scores and he...
Equine abortion due to Chlamydia psittaci in South Australia with zoonotic transmission.
Australian veterinary journal    November 11, 2025   Volume 103, Issue 12 902-905 doi: 10.1111/avj.70034
McLachlan AD, Woolford L.Chlamydia psittaci was detected by real-time PCR in the lung, liver and kidney of an equine foetus that had aborted in South Australia in August 2023. The corresponding microscopic lesions included lymphocytic and histiocytic chorionitis, necrosis of placental villi associated with bacteria in the cytoplasm of trophoblastic epithelial cells, and multiple microgranulomas in the liver. Equine chlamydial abortion had not been diagnosed previously in South Australia. Eight days after examining the foetus and placenta, the veterinary pathologist developed fever and subsequently was admitted to hosp...
Complications Associated with Equine Diagnostic and Elective procedures.
The Veterinary clinics of North America. Equine practice    November 10, 2025   Volume 41, Issue 3 453-472 doi: 10.1016/j.cveq.2025.08.012
Morales CJ, Costa LRR.The practice of medicine has always been associated with complications. In fact, in its early stages, these complications contributed to the understanding of certain diseases and advancement of the medical field. In equine practice, virtually every procedure carries an associated risk. In fact, even procedures that would have minimal risk in human medicine may pose significant risk in equine practice owing to the unique nature of the horse. For instance, a simple rectal palpation could result in a rectal tear following an unexpected movement of the patient. Thus, extrapolations of complication...
Proof of concept of a wearable IoT-based system for monitoring respiratory rate and surface temperature in horses.
Journal of equine veterinary science    November 8, 2025   Volume 155 105729 doi: 10.1016/j.jevs.2025.105729
Farias BJP, Furtado DA, Barbosa do Nascimento JW, Neto JPL, de Morais FTL, Santos TLS, Vasconcelos AS, Silva RC, Alves JIP, Mcmanus C, Silveira RMF....This study presents the development and proof of concept of a wearable monitoring system designed to measure respiratory rate (RR) and coat surface temperature (CST) in horses. The device integrates an embedded system based on an ESP-32 microcontroller equipped with sensors for RR (strain gauge) and CST (DS18B20) Data are transmitted in real time via Wi-Fi and stored locally on SD cards. The system was validated against conventional manual methods under field conditions. Agreement between methods was evaluated using Intraclass Correlation Coefficients (ICC) and Bland-Altman plots. Results show...
L-Carnitine supplementation to the stallion semen extender attenuates the cryopreservation induced oxidative stress and ameliorates sperm functional attributes.
Journal of equine veterinary science    November 8, 2025   Volume 155 105731 doi: 10.1016/j.jevs.2025.105731
Solanki O, Talluri TR, Jhamb D, Kumar S, Pargi KK, Paul N, Kutty M, Dedar RK, Meena M, Gaur M, Bhattacharya TK.The current study evaluated the effect of L-Carnitine supplementation to the stallion semen extender on pre-freeze and post-thaw semen quality and oxidative parameters in Marwari breed stallions. Methods: For this purpose, thirty-six semen ejaculates (6 ejaculates from each stallion) were collected using an artificial vagina (AV) from six adult Marwari stallions. The gel free semen was extended with different concentrations of L-Carnitine (LC) i.e. 0 mM (control), 2.5 mM (T1), 5 mM (T2) and 10 mM (T3). Pre-freeze and post-thaw semen evaluations were conducted for various seminal attributes and...
Detection of degenerative joint disease of the distal interphalangeal joint in thoracic limbs characterized by joint space narrowing using standing low-field MRI in 25 equine patients.
Journal of the American Veterinary Medical Association    November 7, 2025   1-9 doi: 10.2460/javma.25.06.0368
van Veggel ECS, Cokelaere SM, Vanderperren K, Selberg KT, Rasmussen J, Bergman HJ, Vernooij JCM, Hoogelander B.To report low-field standing MRI findings and, when available, postmortem findings of 25 thoracic limbs with degenerative joint disease of the distal interphalangeal joint (DIPJ) characterized by narrowing of the joint space suggestive of cartilage loss. Unassigned: Medical records from September 2015 to July 2022 were reviewed for clinical history, signalment, MRI, and postmortem findings. The study retrospectively analyzed cases in which lameness was linked to DIPJ joint space narrowing using a partially nested comparative design. Width was measured at 4 DIPJ sites, as well as a ratio to the...
Quantitative assessment of gait alterations and variability in sulky-driven Standardbred trotters after a standardised exercise test.
Equine veterinary journal    November 6, 2025   doi: 10.1111/evj.70114
Aarts RM, Smit IH, Ferraz GC, Rhodin M, Serra Braganca FM, Hernlund E.Assessment of equine metabolic and locomotory responses to quantified levels of physical exercise is needed to support the creation of tailored protocols for optimal training adaptation. The locomotory response to exercise in horses is not fully understood. Objective: To investigate the effect of a standardised exercise test (SET) on upper-body and limb kinematics and stride-to-stride variability in Standardbred Warmblood trotters. Methods: Experimental repeated-measures field study. Methods: Thirteen Standardbred trotters, equipped with nine inertial measurement units (IMUs), performed an inc...
Molecular detection and genotyping of Theileria equi infection within the equine population in Giza, Egypt, using real-time PCR as compared with conventional detection methods.
Iranian journal of veterinary research    October 31, 2025   Volume 26, Issue 2 145-151 doi: 10.22099/ijvr.2025.51028.7553
Soliman AM, Elhawary NM, Helmy NM, El-Seify MA, Amer MM, Mohamed S, Memon FU, Rashid MHO, Gadelhaq SM.Equine piroplasmosis represents one of the main and serious health problems affecting the equines industry globally, caused by a tick-borne protozoa called and . This study aimed to identify and genotype within the equine population from Giza Governorate, Egypt, by comparing the obtained results using the available diagnostic methods. Unassigned: We collected 116 apparently healthy horses from the study area during the first half of 2019 to identify using real-time PCR (qPCR), targeting the gene. The results were compared with those from microscopic examination of Giemsa-stained blood sme...
Policresulen is effective for the topical treatment of vaginal varices in a pregnant mare: Case report.
Journal of equine veterinary science    October 30, 2025   Volume 155 105711 doi: 10.1016/j.jevs.2025.105711
Miguel EL, Carneiro MFL, Griffo ALC, Baatsch Nascimento F, Dória RGS, Corrêa RR, Celeghini ECC.Vaginal varicosities in mares are rarely reported, although considered relatively common. Clinical recognition can be challenging, especially during early pregnancy, due to the intermittent nature of the bleeding. This report aims to describe the diagnostic approach, clinical evolution, and treatment of a case of vaginal varicosity in a pregnant mare, emphasizing a practical and minimally invasive method. A 9-year-old Brazilian Sport Horse mare with intermittent vaginal hemorrhage underwent clinical evaluation, showing no abnormalities. Vaginoscopy with a rigid endoscope revealed varicose vein...
Iatrogenic aspiration pneumonia in six horses: A retrospective case series.
Journal of equine veterinary science    October 30, 2025   Volume 155 105712 doi: 10.1016/j.jevs.2025.105712
Vainio KME, Määttänen MK, Mykkänen AK, Huupponen AK, Niinistö KE.Iatrogenic aspiration pneumonia is rarely reported in horses, with most cases involving lipoid pneumonia from accidental mineral oil administration. Objective: Our aim is to describe horses with iatrogenic aspiration, highlighting clinical findings, treatment, outcomes, and prognostic differences based on the aspirated material. Methods: Management of 6 horses treated at the University of Helsinki Equine hospital due to iatrogenic aspiration between 2018 and 2023 are reported. Results: Of the six horses, three survived, two of whom regained full athletic function. Survivors received water, or ...
Lethal Sycamore maple intoxication in a grazing three-month-old foal.
Journal of equine veterinary science    October 30, 2025   Volume 155 105713 doi: 10.1016/j.jevs.2025.105713
Janzen N, Sander J, Terhardt M, Mallek M, Smith H, Witt P, Theelen MJP.The case of a young foal poisoned by maple toxin is described. It showed signs of myopathy caused by ingesting life-threatening amounts of maple toxin. Some maple trees (Acer species) can pose a health risk to grazing horses. The leaves, seeds and shoots contain hypoglycin A (HGA) and methylencyclopropylglycine (MCPRG) and can cause life-threatening atypical myopathy.
Reconstruction of an orbital fracture in a mare using a 3D-printed patient-specific implant.
Veterinary surgery : VS    October 30, 2025   doi: 10.1111/vsu.70050
Gernhardt J, Böttcher P, Eule JC, Mählmann K, Müller E, Lischer CJ.To describe surgical repair of an orbital wall fracture communicating with the caudal maxillary sinus using a three dimensional (3D)-printed, patient-specific implant (PSI). Methods: Case report. Methods: A 25-year-old Haflinger mare (370 kg). Methods: The mare presented with severe chemosis and emphysema of the left upper and lower eyelid of 2-weeks duration due to a fracture of the ventral floor and inner wall of the left orbit that communicated with the caudal maxillary sinus. Computed tomographic (CT) data were used to design a PSI replicating the inner surface of the unfractured orbit. ...
Standing excision of the nasal septum of 12 horses.
Veterinary surgery : VS    October 30, 2025   Volume 55, Issue 1 110-117 doi: 10.1111/vsu.70049
Brink P, Schumacher J, Ducharme NG, Caniglia CJ, Caruso MA, Ortved K.To describe the technique of and complications associated with excising the nasal septum of horses with the horse standing and to report the outcome of horses undergoing this procedure. Methods: Retrospective study. Methods: A total of Twelve horses affected with disease of the nasal septum. Methods: The septum of each horse was excised with the horse sedated. All horses underwent rhinotomy, and six also underwent laryngotomy, to position three loops of obstetrical wire used to make three of four septal incisions. The sites of laryngotomy and rhinotomy were desensitized by infiltrating local a...
Incubation of Frozen-Thawed Semen Under Capacitating Conditions Supports Successful In Vitro Fertilization and Improves Intracytoplasmic Sperm Injection-Results in Horses.
Andrology    October 29, 2025   Volume 14, Issue 2 583-593 doi: 10.1111/andr.70139
Broothaers K, Angel-Velez D, Molto FLG, Hedia M, Coster T, Govaere J, Soom AV, Menten B, Smits K.In 2022, a repeatable protocol for in vitro fertilization (IVF) using fresh semen was established in horses. This facilitated successful capacitation of equine semen allowing to explore novel applications. Objective: We aimed to extend this technique to IVF with frozen-thawed semen and intracytoplasmic sperm injection (ICSI), and determine the outcome parameters such as blastocyst production and euploidy rates. Methods: A total of 221 oocytes were subjected to either IVF with frozen-thawed semen, ICSI with frozen-thawed semen incubated under capacitating conditions (ICSI cap) or control ICSI w...
Melanoma in horses: distribution by sex, age, nationality, and slaughterhouse findings in 28 horses from Northern Italy.
Veterinary research communications    October 29, 2025   Volume 50, Issue 1 12 doi: 10.1007/s11259-025-10921-7
Muresu Ibba GM, Poeta A, De Lorenzi G, Pupillo G, D'Annunzio G, Pezzarossi A, Bisceglia I, Mangone L.Melanomas are dermal-epidermal and subcutaneous tumors commonly found in horses, especially those with grey coats. This study aimed to characterize melanomas in slaughtered horses by analyzing their distribution according to sex, age, and nationality, and to describe the veterinary inspection interventions required at slaughterhouses based on lymph node involvement and distant metastases in a province of northern Italy. Between January and December 2024, 182 grey horses were examined, and 28 cases of melanoma were identified (15% of grey horses) with an average age of 14 years: 8 males (mean a...
Characterization of the lambda light chain repertoire and non-coding regions of equine immunoglobulins using the EquCab3 genome.
Molecular immunology    October 29, 2025   Volume 188 1-11 doi: 10.1016/j.molimm.2025.10.008
da Silva GM, Navas C, Carvalho MB, Sampaio Y, Rocha MN, Gomes-Silva A, de Matos Guedes HL, Cunha L, Castilho LR, da Silva JL, Felicori LF.Horse immunoglobulins have been utilized for over a century in serotherapy to treat venomous animal bites and various other conditions. However, molecular-level information about these immunoglobulins remains limited, particularly regarding immunoglobulin lambda light chains (Igλ), which constitute over 90 % of circulating antibodies. Despite the sequencing of the equine genome, the International ImMunoGeneTics information system (IMGT) has not yet annotated Igλ in its database, restricting the analysis of the horse antibody repertoire. In this study, we analyzed the equine Igλ repertoire...
A review of current and potential applications of macroalgae to equine veterinary science.
Journal of equine veterinary science    October 29, 2025   Volume 156 105709 doi: 10.1016/j.jevs.2025.105709
Warren P, Mc Crudden D, O'Reilly S, Mc Eleney C.Macroalgae have been used in supplements and feedstuffs for equines and other animals for many years. Health-related attributes of macroalgal bioactive compounds, including antioxidant, anti-inflammatory and anthelmintic effects, have been largely reported in non-equine species to date. Given the prevalence of resistance to antimicrobial and anthelmintic drugs, sourcing naturally occurring alternatives is of high priority in the current One Health strategy. Nutritionally, seaweed contains a broad range of macro and micro nutrients. These nutrients, combined with the bioactive compounds such as...
Ventricular arrhythmias induced by snake bite in a horse: A case report.
Journal of equine veterinary science    October 29, 2025   Volume 155 105708 doi: 10.1016/j.jevs.2025.105708
A Mangalarga Marchador mare was referred to treatment with a history of poisoning with evident tachyarrhythmia detected on cardiac auscultation. The electrocardiogram was performed and detected occurrences of paroxysmal monomorphic ventricular bigeminy (pMVB), pMVB with pairs of premature ventricular contractions (PVC) (pMVBPC), and paroxysmal monomorphic ventricular tachycardia (pMVT). In all cases, incomplete atrioventricular dissociation and coupling variation are observed. These characteristics, associated with non-reduction of successive subsequent coupling intervals and the absence of ty...
Determinants of stride parameters in Thoroughbreds racing in Japan.
American journal of veterinary research    October 28, 2025   Volume 87, Issue 2 ajvr.25.07.0273 doi: 10.2460/ajvr.25.07.0273
Takahashi Y, Pfau T, Tsuruoka F, Yoshida T, Edwards WB, Mukai K.To identify the race- and horse-level factors affecting stride parameters during Thoroughbred races in Japan. Unassigned: Global Navigation Satellite System sensors were attached to 921 horses (1,189 starts) participating in 83 races, with distances ranging from 1,000 to 1,800 m, held from April through July 2024. Stride frequency and stride length were calculated from speed spectrograms at 3 racing phases (phase 1, 200 m after gate open; phase 2, 10 m after reaching the final straight stretch; and phase 3, 130 m before the finishing line). Additionally, 10 variables (race distance, surface ty...
Biological effects of β-D-glucans from natural sources on equine health and performance: A review.
Research in veterinary science    October 28, 2025   Volume 197 105947 doi: 10.1016/j.rvsc.2025.105947
Piecuch A, Szterk A.This review highlights the role of β-glucans-specifically β(1 → 3), β(1 → 6), and β(1 → 4)-glucans-as water-soluble dietary fibres in animal nutrition and health. Sourced from yeast, plants, seaweed, and mushrooms, β-glucans differ in structure depending on origin, which affects their solubility and biological activity. Recent studies emphasize their therapeutic potential in horses, particularly for managing gastric ulcers, viral infections, immune dysfunction, and poor performance. The review summarizes data on effective dosages, formulations, and sources of β-glucans tailor...
A comparison of fecal output determined by total fecal collection or titanium dioxide in horses.
Journal of animal science    October 28, 2025   Volume 103 skaf375 doi: 10.1093/jas/skaf375
Fowler AL, Pyles MB, Hayes SH, Crum AD, Lawrence LM.Total fecal collection studies to determine digestibility of nutrients are costly and laborious. The use of externally dosed indigestible markers, such as titanium dioxide (TiO2), to estimate digestibility using spot samples could be advantageous, but studies validating their use in horses are inadequate. Two experiments were conducted to determine if TiO2 in fecal spot samples effectively estimated fecal output in horses. In Exp. 1, four mature horses were fed a forage-based diet (85:15 forage: concentrate) split into two equal meals with 1.75 ± 0.03 g TiO2/kg DM (10 g TiO2) per day ...
Positron emission tomography using 18F-fluorodeoxyglucose reveals digital perfusion deficits associated with continuous weight-bearing in healthy standing horses.
American journal of veterinary research    October 24, 2025   Volume 87, Issue 1 ajvr.25.07.0268 doi: 10.2460/ajvr.25.07.0268
Skelton G, Wulster-Bills K, Ciamillo S, Anishchenko S, van Eps A.To characterize healthy foot perfusion patterns under static weight-bearing load using 18F-fluorodeoxyglucose (18F-FDG) PET. Unassigned: In 8 healthy adult light-breed horses (from May 2021 through September 2024), 18F-FDG was injected while horses stood continuously weight-bearing (CWB) for a 20-minute scan period. A repeat scan was then performed after 20 minutes of ambulation. On a separate occasion, scans were performed with ambulation allowed between injection and scanning (Amb_Control). 18F-fluorodeoxyglucose uptake was quantified via metabolic volume and standardized uptake values for c...
Stress-related bone injuries of the carpal joints in show jumping horses rarely limit long-term performance: a retrospective study of 15 cases.
Journal of the American Veterinary Medical Association    October 24, 2025   Volume 264, Issue 2 218-226 doi: 10.2460/javma.25.07.0443
Micheau L, Jacquet-Guibon S, Tallaj A, Bertoni L, Denoix JM, Coudry V.To describe the type and distribution of carpal joint lesions causing lameness in show jumping horses and describe their 1-year performance outcomes. Unassigned: 15 show jumping horses (median age, 9 years; IQR, 8 to 11 years) of 3 different breeds, mostly Selle Français, evaluated at a referral center between 2013 and 2023. The inclusion criterion was forelimb lameness localized to the carpus, confirmed by perineural or IA analgesia and/or increased radiopharmaceutical uptake on scintigraphy. Horses with limb conformation abnormalities, a history of trauma, or extra-articular soft tissue les...
A de novo FBN1 variant likely causes congenital bilateral ectopia lentis in a crossbred horse.
Scientific reports    October 24, 2025   Volume 15, Issue 1 37238 doi: 10.1038/s41598-025-21139-7
Esdaile E, Houston K, Till BJ, Sutton RB, Scurrell E, Ling M, Hartley C, Bellone RR.Although several inherited ocular disorders have been extensively studied in horses, few reports of equine ectopia lentis exist and no genetic investigations have been reported. Ectopia lentis in humans and other species is reported to be caused by trauma, genetic variants, and systemic diseases. The most commonly reported genetic causes are dominant alleles in FBN1. Here we examined a 3-day old Oldenburg x Thoroughbred colt due to concerns over bilateral ocular anomalies and hypothesized that either a recessively inherited allele or a dominant de novo allele was the genetic cause. Examination...
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