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Topic:Clinical Findings
Clinical findings in horses encompass a range of observable signs and symptoms identified during veterinary examinations that contribute to diagnosing and managing equine health conditions. These findings can include physical observations, such as changes in behavior, posture, or gait, as well as physiological measurements like heart rate, respiratory rate, and temperature. Diagnostics may also involve laboratory tests, imaging, and other diagnostic procedures to assess organ function and detect abnormalities. Recognizing and interpreting clinical findings are essential components of veterinary practice, aiding in the identification of diseases, monitoring treatment progress, and guiding therapeutic interventions. This page brings together peer-reviewed research studies and scholarly articles that explore the methodologies, interpretations, and implications of clinical findings in the context of equine health care.
[Retrospective evaluation of equine blood cultures sampled between 2022 and 2024]. In this study, the results of equine blood cultures sampled during the period from 2022 to 2024 were evaluated. Samples were submitted as routine samples by veterinary practices to a veterinary diagnostic laboratory in Germany. The study focused mainly on the differentiation of the bacterial isolates. In order to place the results in a clinical context, the study was complemented by a questionnaire sent to the practices enquiring for sepsis-associated clinical signs. Unassigned: The study was carried out retrospectively. A total of 199 blood culture samples submitted by practices located in Ge...
Prepubic Tendon Rupture and Uterine Herniation in a Late-Term Kurdish Mare: A Case Report. Prepubic tendon rupture (PPTR) is a rare but life-threatening complication in late-term pregnant mares. It results in abdominal wall failure, ventral oedema and a poor prognosis for both the mare and foetus. A 14-year-old multiparous Kurdish mare at approximately 310 days of gestation presented with acute ventral distension, reluctance to walk and cranial displacement of the udder. Clinical evaluation revealed tachycardia, pallor and Grade 3/4 ventral oedema. Haematology indicated leucocytosis and haemoconcentration. Transabdominal ultrasonography showed a viable foetus and severe thinning of ...
Molecular and serological survey on Theileria equi and Babesia caballi infecting Arabian horses in the northern provinces of Syria. Equine babesiosis is one of the prevalent diseases in horses worldwide, but its presence in Syria generally and in the northern region specifically is not known. In Syria, the civil war has severely disrupted veterinary services, hence disease control measures, creating a fertile ground for the spread of tick-borne diseases. Unassigned: This study aimed to conduct a comprehensive molecular and serological survey of and . in Arabian horses from the northern provinces of Syria, regions heavily impacted by the war. Unassigned: A total of 110 Arabian horses, aged between 2 and 10 years, were inc...
Rostral hard palate swelling (lampas) in horses: true or fiction? This study aimed to determine the occurrence of swellings (lampas) in the rostral portion of the hard palate in young, adult, and elderly horses and to characterize them histologically. One hundred and twenty horses of different ages were evaluated by oral inspection. Horses were classified with lampas when the mucosa of the hard palate extended beyond the occlusal surface of the upper incisors and samples of palatal mucosa were collected. Ten other horses without rostral hard palate alterations, euthanized for unrelated causes, were included as the control group. Histological analysis include...
Integrating clinical and rna-seq findings in a mare with recurrent endocrinopathic laminitis linked to equine metabolic syndrome. Equine metabolic syndrome (EMS) is characterized by insulin dysregulation and obesity, which increase the risk of the development of hyperinsulinemia-induced laminitis (HAL). The present report describes a case of severe endocrinopathic laminitis associated with EMS, refractory to treatment. A 5-year-old mare with recurrent HAL presented transient relief upon a low nonstructural carbohydrate diet and conventional therapy. An SGLT2 inhibitor was introduced to reduce resting insulin levels, and improvement was observed until October 2024, when the most severe episode started. Despite adding perg...
Complete atrioventricular septal defect in Thoroughbred foals: echocardiographic and postmortem findings. Complete atrioventricular septal defect (AVSD) is rarely reported in horses. We retrospectively reviewed three Thoroughbred foals (2017-2023) with necropsy-confirmed complete AVSD and summarized their clinical presentation, transthoracic echocardiographic findings, and postmortem anatomy. All foals showed early signs of congenital cardiac disease including weakness, failure to thrive and cardiac murmurs. Echocardiography demonstrated a common atrioventricular junction with a single atrioventricular valve and combined atrial and ventricular septal defects; all were classified as Rastelli type C...
Deep digital flexor tenotomy provides pain relief and clinical comfort in horses with chronic laminitis. This study evaluated the clinical application, outcomes, and prognostic indicators of deep digital flexor tenotomy (DDFT) in horses with chronic laminitis. Unassigned: A computer-generated search identified all possible cases of laminitis for horses referred to the George D. Widener Hospital for Large Animals at the University of Pennsylvania between 2010 and 2022. Medical records were reviewed for a diagnosis of laminitis by clinical examination and radiographs. The population was characterized by breed, age, clinical features, and radiographic findings. Poisson regression was performed to id...
Atropine induces narrowing of the superior and inferior iridocorneal angle and ciliary cleft in normal horse eyes. To investigate the effects of atropine on the iridocorneal angle (ICA) and ciliary cleft (CC) of normal equine eyes using ultrasound biomicroscopy (UBM). Unassigned: 12 normal adult horses underwent measurement of intraocular pressure (IOP), vertical and horizontal pupil diameter, and UBM of the superior, temporal, inferior, and nasal ICA/CC in both eyes. Measurements were repeated 2 hours following ophthalmic atropine 1% solution application. Measurements of the ICA and CC, including pectinate ligament distance (PLD), CC length (CCL), height of opening distance (HOD), CC area (CCA), and pecti...
Evaluation and Management of the Horse with Head and Neck Disorders. Recognizing possible causes of equine head and neck problems requires a careful and systematic evaluation. While for some disorders reaching a diagnosis and treatment plan is relatively straightforward, for others this can be a complicated road requiring extensive diagnostic techniques, treatment trials, and management strategies. The ability to determine whether the patient is in a painful state, experiencing functional deficits, or in a combination of pain and dysfunction is critical to developing an effective treatment plan. Frequently, behavioral concerns often associated with pain must be...
Adult Equine Optic Nerve Head Measurements Using Spectral Domain Optical Coherence Tomography. To compare equine optic nerve head (ONH) measurements using spectral domain optical coherence tomography (SD-OCT) to detect clinically relevant ONH cupping. Methods: Forty-five eyes from 34 horses were categorized as CONTROL or CUPPED based on indirect ophthalmoscopy and were measured using SD-OCT: Bruch's membrane opening (BMO), optic cup width (OC), anterior laminar depth (ALD), prelaminar thickness (PLT), and cup-to-disk ratio (OC: BMO) at superior (sup.), central (ctr.), and inferior (inf.) ONH locations. Results: The OC:BMO was 0.61 ± 0.09 (sup.), 0.64 ± 0.09 (ctr.), and 0.55 ...
Malignant Ovarian Teratoma in a Lusitano Filly: Diagnostic Challenges and Clinical Significance. An 8-month-old Lusitano filly (a young female horse) was referred with a five-day history of abdominal distension, respiratory distress, and hyporexia. Clinical and ultrasonographic examinations revealed ventral edema, anemia, leukocytosis, hypoalbuminemia, and bilateral pleural effusion. The filly subsequently developed progressive clinical deterioration, including persistent hyporexia, scant fecal output, and acute colic with nasogastric reflux, followed by sudden respiratory decompensation, collapse, and death. Post-mortem examination revealed a large, multilobulated abdominal mass involvin...
Ethological and clinical evaluation of the welfare of horses in draft competitions in Spain. Draft and pulling horses are used in a traditional equestrian sport in the Valencian Community (Spain), in which horses must pull a cart loaded with a weight equivalent to twice their body weight along a sand track. Although it constitutes cultural heritage, this practice raises questions about animal welfare since it involves working horses under demanding physical exertion. There are no studies evaluating the welfare of horses participating in these draft and pulling competitions using validated clinical, ethological, and physiological indicators, and the present work aims to fill this knowl...
[Puncture wounds of the equine hoof – a retrospective study of 96 cases – Part 1: Prevalence, clinical findings and diagnostic investigations]. Penetrating wounds of the hoof are common and potentially life-threatening injuries in equine veterinary practice. The aim of this study was the systematic data analysis of horses presenting to the clinic with a solar puncture wound.In this retrospective study, patient data from horses presented with a puncture wound to the hoof in the period from September 2008 to August 2024 were collected. The analyzed data covered signalment, intended use, and insurance status. The following were also considered: previous history including the period between injury and presentation to the clinic, affected ...
Physical vs. Behavioral Clinical Signs in Horses with Squamous and Glandular Gastric Ulcers. Equine Gastric Ulcer Syndrome is a highly prevalent condition, yet its clinical diagnosis remains challenging due to the nonspecific nature of many associated signs. The relationship between the anatomical location of gastric ulcers and clinical presentation is still poorly defined. This retrospective study aimed to evaluate the association between gastric ulcer location and the clinical signs observed in horses. Medical records of 52 horses diagnosed with gastric ulcers by gastroscopy were retrospectively reviewed. Clinical signs were classified as physical, behavioral, or mixed, and ulcer lo...
Septic Endophthalmitis Following Suprachoroidal Cyclosporine Implant Placement in Two Horses With Equine Recurrent Uveitis. This article presents the clinical and histopathological findings from two horses that developed severe postoperative complications following suprachoroidal procedures routinely employed in the management of equine recurrent uveitis (ERU). Case 1 was a 5-year-old warmblood stallion that initially received a unilateral suprachoroidal triamcinolone injection, followed later by bilateral suprachoroidal cyclosporine implant (CSI) placement. At 9 weeks postoperatively, the right eye (which had undergone both procedures) developed secondary glaucoma necessitating enucleation. Case 2 was a 14-year-ol...
The 2025 outbreak of equine influenza among draft horses at Obihiro Racecourse, Hokkaido, Japan. In 2025, an outbreak of equine influenza occurred among draft horses at Obihiro Racecourse in Hokkaido, Japan. The number of horses showing clinical signs increased dramatically in April. The proportion affected was significantly higher in 2-year-olds than in older groups. The proportion that developed fever during the outbreak was significantly higher than that observed among Thoroughbreds during the 2007 outbreak. In non-epidemic periods, the geometric mean hemagglutination inhibition antibody titer of 2-year-old draft horses was significantly lower than that of 2-year-old Thoroughbreds. The...
Plasma Concentrations Following Oral Administration of Two Different Forms of Resveratrol in Horses. Resveratrol is a compound found in multiple plants and there is evidence for its use as a supplement in horses, particularly through protection of chondrocytes. Previous studies on the clinical efficacy of resveratrol supplementation in horses have reported limited benefits. To date, there is no pharmacokinetic data of resveratrol in horses but the bioavailability of resveratrol in other species is poor. In this crossover study, the plasma concentrations of two forms of resveratrol were examined. Each horse received via nasogastric tube, either a single dose of resveratrol phospholipid or a st...
Multicentric Malignant Melanoma in a Grey Mare: A Case Report. Grey coat color in horses, resulting from a 4.6 kb copy number variation (CNV) within the syntaxin 17 (STX17) gene (Grey locus), is linked to progressive hair depigmentation and a markedly increased risk of melanoma, likely to its function as a melanocyte-specific enhancer. Objective: This report details the clinical, pathological, and genomic findings of a 26-year-old flea-bitten grey mare with multiple melanocytic tumors, progressive dyspnea, and congestive heart failure. Due to the poor prognosis the horse was euthanized and submitted for necropsy to the Long Island University - Lewyt Colle...
Starch Overload and Cecal Alkalinization: Impacts on the Intestinal Microbiota and Health of Horses. Starch overload induces dysbiosis primarily through a reduction in cecal pH. This study aimed to evaluate the cecal microbiota following excessive starch intake, with or without the administration of an intracecal buffering solution. We hypothesized that the buffering solution would mitigate changes in the intestinal microbiota and associated clinical signs. Ten horses were randomly assigned to two groups, each receiving distinct treatments (Group I: saline solution [WSa] and starch-buffer [SB]; Group II: buffer-water [WB] and starch-saline [SSa]). Following starch overload (17.6 g/kg body wei...
Modified Medial Canthoplasty for Correction of Euryblepharon in Two Horses. To describe a medial canthoplasty surgical procedure in two horses for correction of euryblepharon, secondary to microphthalmia, and following excision of retrobulbar fat prolapse. Methods: A 1 year old thoroughbred mare was presented for small globes and chronic ocular discharge bilaterally. Ophthalmic examination revealed microphthalmos, euryblepharon, medial canthal pocket syndrome, and dacryocystitis bilaterally with no visual impairments. A 2 year old Appaloosa gelding was presented for evaluation of a smooth, subconjunctival mass anterior to the right globe in the medial canthus. Oph...
Equine neorickettsiosis: A global perspective of the natural habitat of the bacteria and clinical disease. Equine neorickettsiosis (EN) is an infectious, non-contagious systemic disease of horses caused by the closely related obligatory intracellular bacterial species Neorickettsia risticii and N. findlayensis. Clinical cases are considered endemic in multiple regions across the United States and Canada, as well as in parts of South America, including Uruguay and Brazil. Neorickettsia spp. are obligate endosymbionts of digenean trematodes, which have complex life cycles involving a molluscan first intermediate host, a wide range of invertebrate or vertebrate second intermediate hosts, and a vertebr...
Acute effect of hippotherapy applied on different sitting surfaces in children with special needs. PurposeThis study aimed to assess the acute effects of hippotherapy performed on different seating surfaces on sitting balance and walking speed in children with special needs.Materials and MethodsChildren aged 3-18 years with special needs were included. Participants were assigned to three groups: Group 1 (Saddle), Group 2 (No saddle, direct horse contact), and Group 3 (Saddle with additional texture material). Each group received a 30-min hippotherapy session in a riding arena. Sitting balance was measured with the BeCure balance system, and walking speed was assessed using the 10-meter walk...
Prolonged wireless measurement of intragastric pH in foals. The pathogenesis of gastric ulceration is not well understood in foals, and its relationship with gastric acidity requires further investigation. A wireless capsule, designed for intraesophageal pH monitoring in humans, was adapted to measure intragastric pH in adult horses. Objective: To (1) determine the feasibility of wireless intragastric pH measurement in foals; (2) determine capsule attachment duration; and (3) describe the intragastric pH profiles recorded. Methods: Eight healthy foals aged 24-98 days. Methods: Prospective interventional study. Capsules were attached to the glandular g...
Equine Corneal Stromal Invasive Squamous Cell Carcinoma: Clinical and in Vivo Confocal Microscopic Features of 7 Cases. To describe the clinical and in vivo confocal microscopy (IVCM) characteristics of horses with corneal stromal invasive squamous cell carcinoma (CSI-SCC). Methods: Retrospective study of 7 horses with histopathologically confirmed unilateral CSI-SCC. Methods: Horses with corneal CSI-SCC were examined by laser scanning IVCM. Signalment, clinical findings, and histopathology results were compared with IVCM findings. Results: Clinical ocular lesions in all horses included a heavily vascularized, opaque, gray or tan, anterior or midstromal opacity invading the cornea from the limbus. The corneal ...
Unilateral vision loss associated with corneal opacity and posterior lens luxation in the right eye of a Thoroughbred gelding: Case report. A 15-year-old Thoroughbred gelding was presented for examination due to chronic corneal opacity in the right eye, which had been noted for several years. An ophthalmic evaluation revealed dense, irregular corneal opacity; an absence of the direct pupillary light reflex; and a positive dazzle reflex. Fluorescein staining was negative and cytology of a corneal conjunctival swab identified nucleated squamous epithelial cells, but no inflammatory cells. Slit-lamp examination failed to visualize intraocular structure, and the lesion was deemed to be chronic and irreversible. An obstacle-avoidance t...
Fragile foal syndrome: manifestations, heterozygous advantage and the future of breeding policies. Scientific interest in relation to Fragile Foal Syndrome (FFS) has proliferated in the last decade, but before this, many clinical cases were attributed to other similarly presenting equine neonatal disorders. It was thought that FFS-affected foals were mainly miscarried throughout gestation, but recent study results suggest that often, foals are born alive and die shortly after birth. FFS is proposed to have originated as long ago as the Godolphin Arabian, but the definite derivation of the mutant allele is unconfirmed. The discovery that FFS is present in 11-30% of Warmbloods and 2-3% of Tho...
Disorders of the Equine Head and Neck: Paranasal Sinuses. This article provides an overview of equine paranasal sinus disease with emphasis on relevant anatomy, diagnostic considerations, and commonly encountered pathologic conditions. It outlines the structure and drainage of the paranasal sinuses to establish a foundation for understanding disease development and spread. The discussion reviews available diagnostic modalities and their roles in localizing disease and determining underlying causes. Common sinus disorders are presented with attention to their general pathophysiology, diagnostic features, treatment approaches, and expected outcomes. Co...
Radiographic findings of candidate stallions presented for licensing at all German Warmblood horse-breeding associations in 2018-2020. Current studies on the health status of young German Warmblood stallions are lacking. Objective: To evaluate the prevalence of radiographic findings at licensing examinations of Warmblood candidate stallions and quantify the environmental influences on the distribution of recorded findings. Methods: In this retrospective observational study, records of 1693 radiographic examinations performed on 1678 German Warmblood stallions presented for licensing in 2018-2020 were reviewed. Data were provided by all German Warmblood horse-breeding associations and their official veterinarians. The collecti...
[Equine laryngeal dysplasia – overview of variable clinical presentation based on 6 cases]. Equine laryngeal dysplasia (ELD) is the umbrella term for various malformations of laryngeal structures that arise from the 4th and 6th branchial arches during embryogenesis. The disease is rare and may be subclinical. In symptomatic patients with clinical signs, the clinical presentation is highly variable and is the result of functional limitations of the larynx as well as of the esophageal sphincter. The spectrum of signs may range from respiratory changes such as abnormal respiratory noise, coughing, and at times dyspnea all the way to poor performance, dysphagia, aerophagia, and colic. Th...
