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Association between radiographic equine distal phalanx characteristics and absence, presence and type of horseshoes. Most horses are used with horseshoes additionally supported by either dorsoabaxial or dorsal clips. The effects of such clips on bone density and shape of the distal phalanx are currently unclear. The aim of this study was to identify correlations between density and shape of the distal phalanx, comparing front hooves unshod or shod with standard shoes either with two dorsoabaxial clips or with a single dorsal clip. Researchers analyzed Oxspring radiographs of either the left or right front hoof from warmblood horses ( = 137) and ponies ( = 43) aged 3-28 years. The evaluation focused...
Tendon/Ligaments: Structure and Composition. The mid-metacarpal SDFT, intrasynovial DDFT and suspensory ligament are frequently injured soft tissues in the equine athlete. The mid-metacarpal SDFT exhibits a hierarchical structure and encounters repetitive strains at its functional limit. The intrasynovial DDFT possesses fibrocartilage where opposing bony surfaces to facilitate resistance-free gliding and contains chondrocyte-like cells embedded in a proteoglycan-rich ECM. While suspensory ligament enthesis injuries are common, collagen and non-collagen ECM structure-function specializations at the bone-ligament interface are understudied...
Pathophysiology of penetrating captive-bolt stunning of horses. There has been limited research into the effectiveness of penetrating captive bolt (PCB) for stunning horses () at slaughter. This study observed 100 horses at a commercial abattoir in Mexico, stunned using pneumatic PCB. Animals were assessed at the time of stunning and immediately after for signs of effective/ineffective stunning and shot positioning, with macroscopic gross brain pathology conducted to determine brain trauma. Twenty-five percent (25/100) received more than one shot and 28% (28/100) displayed behavioural signs of ineffective stunning. Of these 28 animals, all had deviations o...
Risk factors associated with owner-reported sleep disturbances in Nordic horses. Very little is known about sleep disturbances in horses, although several management or animal-based factors may contribute to an increased risk of disturbances. Objective: To investigate factors related to rest and sleep behaviour of horses kept in stalls as perceived by Nordic horse owners or caretakers and their association with suspected sleep disturbances (SSD). Methods: Cross-sectional survey. Methods: The 40 question online international survey included a convenience sample of horse owners or caretakers with horses over 4 years old kept in the same individual stalls for at least the l...
A Ridiculous Business Card in a Horse Dentist Family. Early in the 1900s, a Philadelphia Horse Dentist apparently had a jolly sense of humor. A business card with a fun reverse is evidence of that. In 1876 Peter J. Haley, Sr. founded a veterinary horse parlor business in Philadelphia, Pennsylvania, and his sons Peter Jr. Haley and James Raymond Haley carried their father's work forward, after his death.
Histopathological and molecular evaluation of hydatid cysts according to necropsy findings of 52 equids in Türkiye. is a parasitic cestode primarily maintained within an equine-canine life cycle, with horses, donkeys, mules, and other ungulates serving as intermediate hosts. Although has historically been considered non-zoonotic, recent molecular studies suggest that this assumption may need to be reevaluated. This study aimed to investigate the presence and molecular characterization of in equids from Türkiye. A retrospective analysis of 52 equine necropsies performed between 2020 and 2025 identified hydatid cysts in one Arabian horse and two donkeys. Gross and histopathological examination confirmed t...
In Silico Analysis of Stress Distribution in Proximal Interphalangeal Joint Arthrodesis in Horses Using a Locking Compression Plate. This study aimed to compare the stress distribution in proximal interphalangeal joint arthrodesis with locking compression plate in horses based on the type and method of screw implantation in the proximal hole and partial or total removal of implants after fusion.Finite element analysis.Proximal interphalangeal joint arthrodesis was simulated using a 3-hole, 4.5-mm narrow locking compression plate combined with two 5.5-mm transarticular screws. Models were created according to the type (cortex or locking) and method of implantation (uni- or bicortical) of the screw in the proximal hole of the...
Endoscopically assessed mucus parameters in equine asthma: Relationship to clinical history and cytological findings data. Mucus parameters are hallmark diagnostic features of equine asthma (EA). Objective: To investigate the relationship between mucus quantity score and mucus viscosity score with signalment, history, clinical findings and cytological parameters. Methods: Retrospective cross-sectional study. Methods: Mucus quantity and viscosity scores, signalment, history and clinical findings recorded for diagnostic purposes from up to 1599 samples, and cytological values of the corresponding bronchoalveolar lavage fluid (BALF) and tracheobronchial secretions were analysed. The cut-off value of a mucus quantity ...
Computed tomography identifies the proximodorsomedial subchondral bone of equine central tarsal bones as a predilection site for sclerosis, demineralisation and associated fractures. The distribution pattern of central tarsal bone (CTB) changes has not been described, except for slab- and dorsomedial-plantarolateral fractures. Objective: To describe CTB changes in CT and document their distribution and associations. Methods: Retrospective case series. Methods: Standing and recumbent tarsal CT studies from 94 clinical cases were retrospectively evaluated. General case information, degree of sclerosis (none-severe), lesions (demineralisation, cystoid, fissure/fracture) and their location were recorded, dividing CTBs into 8 regions. Results: Eighty five of 94 tarsi showed at ...
Turf track surface interaction with speed and musculoskeletal injury risk in Thoroughbred racehorses. Injury modelling based on changes in speed and stride characteristics of racehorses has become a primary industry focus for the Thoroughbred racing industry. However, speed and stride characteristics are strongly associated with track condition; therefore, reliable quantification of surface variables for use in future models is imperative. Objective: This study aimed to understand the interaction of objective turf track condition score (TCS) measurement with racing speed and injury in flat racing Thoroughbred horses. Methods: Retrospective time series analysis. Methods: Race-day data from 16 f...
Horse Activity Participants’ Perceptions About Practices Undertaken at Activity Venues, and Horse Welfare and Wellbeing. Participation in horse-related activities frequently involves relocating horses from the home stable to an activity venue, which might require local, regional, or international travel. In these circumstances, horses are exposed to unfamiliar surroundings and experience changes to their daily routines, which could have negative welfare impacts. An online survey was conducted in 2021 to ask experienced horse sector participants about the horse management practices that they perceived worked well and provided for positive horse welfare when undertaken at venues. Qualitative analysis identified fo...
“But my horse is well cared for”: A qualitative exploration of cognitive dissonance and enculturation in equestrian attitudes toward performance horses and their welfare. There is concern amongst the public, equestrians, animal welfare organisations, and horse-sport governing bodies regarding the welfare of performance horses, but equestrian culture appears slow to change. The present study seeks to increase our understanding of human factors underlying the persistence of welfare-compromising management and training practices within the performance horse world. Individual, semi-structured interviews focused on equestrians' attitudes were conducted with 22 equestrians from classical equestrian disciplines in the US, Canada, and the UK. Interview transcripts were...
Transcriptomic sequencing and differential analysis of Kazakh horse muscles from various anatomical locations. Kazakh horses, a distinguished breed in China known for their dual-purpose use in milk and meat production, exhibit early maturation, tolerance to coarse feeding, and strong resistance to environmental stress. However, the gene expression differences across various muscle tissues of Kazakh horses have yet to be elucidated. In this study, transcriptomic sequencing was performed on muscle tissues from three anatomical regions of Kazakh horses, including the longissimus dorsi (Gb), external oblique (Gf), and diaphragm (Gg) muscles. In the Gb and Gf groups, 426 differentially expressed genes (DEGs...
Cryopreserved equine umbilical cord tissue allograft characterization and biocompatibility in vivo in musculoskeletal tissues: a controlled study. The use of micro-particulate allografts is rising, but knowledge about the protein characterization and biocompatibility of umbilical cord-derived allografts (UC) in vivo is limited. Methods: Proteomic analyses using mass spectrometry (MS) determined equine UC protein relative quantification and functions using total spectral counts (TSC). UC cytokines were quantified by enzyme-linked immunosorbent assay (ELISA). Three in vivo studies assessed recipient clinical and tissue biocompatibility in joints and ligaments. Results: Proteomics revealed 2645 annotated TSCs. Proteins of > 89 TSC we...
Total mixed ration enhances nutrient digestibility, blood biochemical parameters and faecal microbial diversity in horses. Total Mixed Ration (TMR) is recognized for its balanced nutritional composition, improved feed efficiency, enhanced animal production, and stabilization of the gastrointestinal microbiome. It has been extensively implemented in intensive ruminant farming, particularly for cattle and sheep, with demonstrated positive outcomes. However, its effects on the nutritional health of non-ruminant herbivores, such as horses, remain insufficiently investigated. This study aims to evaluate the comparative effects of TMR feeding versus conventional feeding practices in Akhal-Teke horses while maintaining i...
Horse owners seeking online health information: a mixed-methods study. Many people seek health-related information online, not only for themselves but also on behalf of others who cannot articulate their symptoms. This proxy information-seeking behavior is particularly relevant for animal owners, who must interpret their animals' symptoms without direct verbal feedback. While online health information-seeking in the context of one's own health is well-studied, the specific challenges of searching by proxy, especially for animal health information, remain largely unexplored. Unassigned: This study aimed to determine the specific information needs and search behavi...
A retrospective study of radial fractures in racehorses in California, 2006-2022. Radial fractures are relatively uncommon (0-1%) injuries in postmortem studies of racehorses, and few cases have been published. We describe here a series of 42 cases of radial fractures observed in California racehorses. Autopsy findings from all racehorses submitted for postmortem examination between 2006 July 1 and 2022 June 30 that had a recorded radial fracture were evaluated. We included 42 horses (30 Thoroughbreds, 12 Quarter Horses), most of which were 3-5-y-old. Catastrophic radial fracture was observed in 30 (71%) horses; in the remaining 12 (29%) horses, the fracture of the radius w...
Long-Term Maintenance of High Neutralizing Anti-SARS-CoV-2 Antibodies Titres in Mares’ Milk and Offspring Serum After Pregnant Mares Immunization With SARS-CoV-2 Spike Protein. In this study, we aim to report the persistent presence of anti-SARS-CoV-2 immunoglobulins in pre-immunized mare offspring. Three mares from Vital Brazil Institute were pre-immunized with recombinant SARS-CoV-2 spike protein and became pregnant during this period. After parturition, the mares' serum and colostrum/milk and foal serum were collected over 6 weeks. Our results have shown high and persistent presence of IgG and neutralizing antibodies over the weeks not only in the mares' serum, as expected, but in mares' colostrum/milk and foal serum as well-what were very surprising. This peculia...
Impact of high hydrostatic pressure treatment on physicochemical characteristics, structural characteristics, and functional characteristics of mare milk casein. High hydrostatic pressure (HHP) can modify protein structures to enhance functional properties, yet its effects on mare milk casein are unknown. This study investigated how HHP modifies mare milk casein's physicochemical, structural, and functional characteristics at pH 7 and 9. The results showed that HHP increased solubility, reduced turbidity, and altered particle size and surface charge. Structural analysis revealed conformational changes, including decreased β-sheet content (pH 7) and increased hydrophobic exposure. Functionally, at pH 7, HHP enhanced foaming and water-holding capacit...
Differential analysis of testicular LncRNA in Kazakh horses of different ages. The reproductive performance of horses is closely associated with testicular development, which involves a complex network of gene regulation. The molecular mechanisms underlying the reproductive traits of Kazakh horses are yet to be fully understood. In this study, transcriptomic analysis was performed on testicular tissues from Kazakh horses at different developmental stages using whole-transcriptome sequencing, aiming to investigate differential gene expression and regulatory mechanisms during testicular development. The results revealed significant differential expression of 7678 mRNAs, in...
How accurate are riders in assessing saddle position? Recent research has highlighted the detrimental impact of an ill-fitting saddle on equine health, welfare and performance. A correctly fitting saddle may not fit if positioned incorrectly. Objective: This study assessed riders' ability to visually evaluate saddle position and examine factors that influenced accuracy of assessment. Methods: Survey participants were provided with photographs of a series of saddles on horses obtained from the lateral aspect of the left side of the horse. Saddles were either correctly positioned (n = 5), too far forward (n = 5) or too far back (n = 2). This was in...
Normal MRI features of the manica flexoria in horses and evaluation of the anatomic variability between forelimbs and hindlimbs. Manica flexoria tears are increasingly recognized as a cause of lameness in horses resulting in a need for improved pre-operative diagnosis. Partial tears are difficult to pre-operatively diagnose and thus research for diagnostics of manica flexoria tears has been seen in increasing frequency over the past decade, though a deficit of information exists for the features of this structure on MRI, which is best suited for evaluation of soft tissues. The goal is to perform an observational study on the morphometry of the normal manica flexoria prospectively and describe it retrospectively on MRI. ...
Multi-host distribution of Rhodococcus equi (Prescottella equi) strains and their phylogenomic clustering. Rhodococcus equi is an intracellular bacterial pathogen that can cause infections in various hosts, including humans and animals. Host-associated virulence plasmids have been identified as key contributors to the pathogenicity of R. equi and potentially play a role in determining the host tropism of the bacteria. The investigation of additional clinical and environmental isolates is likely to provide novel insights into the population structure, infection pathways, and drug resistance of this important pathogen. We combined whole-genome sequencing and antimicrobial-susceptibility testing of 37...
Inspiratory and expiratory tracheal pressures during high-intensity exercise in harness racehorses. Exercise-related upper respiratory tract (URT) disorders are common in racehorses. Objective assessment of URT mechanics is essential to quantify degrees of obstruction caused by URT disorders identified upon dynamic endoscopy. Objective: To establish reference values for inspiratory and expiratory tracheal pressures (cmHO) during high-speed treadmill endoscopy in harness racehorses with clinically normal URTs. Methods: Prospective observational study. Methods: Tracheal pressures were measured in harness racehorses (Standardbreds and Norwegian-Swedish coldblooded trotters) in which no URT abno...
Viscoelastic testing is improved following antivenom treatment in rattlesnake-envenomated equids. To characterize coagulopathies before and after antivenom administration in rattlesnake-envenomated equids. Unassigned: Client-owned envenomated equids treated with antivenom at Colorado State University (2023 to 2024). Rattlesnake bite severity score (RBSS), platelet count, prothrombin time, activated thromboplastin time, D-dimers, antithrombin, and viscoelastic testing variables were assessed before and after antivenom administration. Paired comparisons of hemostatic variables between admission and approximately 24 hours, and correlation analysis with RBSS, were performed. Length of hospital...
Artificial intelligence in smartphone video analysis for equine asthma diagnostic support. Equine asthma is a prevalent respiratory disease that negatively impacts horses' health and athletic performance. Traditional diagnostic methods are invasive and require specialised equipment. There is a need for a non-invasive, cost-effective screening tool that can be used by veterinarians and horse handlers in ambulatory settings. Objective: To assess the willingness of veterinarians and horse handlers to adopt such a tool (Questionnaire 1) and the challenges associated with visually recognising equine asthma (Questionnaire 2) and to develop EquiBreathe, an artificial intelligence (AI)-powe...
West Nile virus transmission in the Metropolitan Area of Barcelona (Spain): A One-Health surveillance approach. West Nile virus (WNV), mainly transmitted by mosquitoes, poses significant health risks to humans and horses, particularly in endemic regions. The first detection of WNV lineage 2 in Spain was in 2017 in Catalonia (northeastern Spain). In 2023, WNV was confirmed in a young yellow-legged gull and a probable human case was notified within the urban settings. We aimed to define the zone of WNV circulation in the Barcelona Metropolitan Area where these infections occurred and the effectiveness of the One Health approach for early WNV detection. The Catalan WNV surveillance and control programs in...
Unwelcome neighbours: Tracking the transmission of Streptococcus equi in the United Kingdom horse population. Strangles (Streptococcus equi infection) remains endemic in the UK, with ~300 laboratory diagnoses annually. Sub-clinically infected long-term carriers are considered a key driver of endemicity. Analysing genomes of circulating strains could provide valuable transmission insights of this pathogen. Objective: To determine the population structure and diversity of UK S. equi isolates and to model transmission using epidemiological and whole genome sequencing data. Methods: Retrospective cross-sectional epidemiological and genomic surveillance. Methods: A dated phylogenetic tree derived from 511â...
Plasma C-reactive protein and interleukin-6 concentrations in foals during health and respiratory disease. Early and specific diagnosis of bronchopneumonia in foals is important to prevent severe disease. In human medicine, C-reactive protein (CRP) and interleukin-6 (IL-6) are important diagnostic and prognostic biomarkers in neonatal pneumonia in other species. Evaluation of these markers in foals with naturally occurring respiratory diseases is lacking. Objective: To determine if CRP and IL-6 were useful predictors of respiratory disease in foals from birth to weaning. Methods: Prospective cohort study. Methods: Periodic blood samples from 200 initially healthy foals were collected from birth to ...
Tight nosebands apply high pressures on the horses’ face and alter stride kinematics. Noseband tightness has received increasing attention within equitation science, however, there is little research into how this effects equine behaviour or performance. Objective: 1) determine the peak pressures under noseband in vivo at three different tightness; 2) assess limb and back kinematics at different noseband tightness. Methods: Noseband tightness (n = 8 horses) was set using an International Society for Equine Science (ISES) taper gauge with the three settings being; "two fingers (2F)", "one finger (1F)" and "zero fingers (0F)". Peak pressure under noseband was determined using pre...
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