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“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...
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...
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...
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...
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...
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...
Equine influenza antigen-based particle vaccine protects mice against homologous and heterosubtypic viral challenges. Influenza virus is a common source of respiratory illness and poses a major public health burden globally. Significant efforts have been dedicated towards developing and deploying effective vaccines. However, since being licensed in 1945, influenza vaccines have made limited progress and still suffer from several limitations, including suboptimal efficacy against variants. In this work, we report on two influenza A polyanhydride particle- and pentablock copolymer-based vaccine formulations intended for intranasal or subcutaneous administration. These nanovaccines are based on a newly discovere...
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...
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...
Natural Frequencies in Sexual Pelvic Thrusting. Seventy percent of mammals copulate using repeated pelvic thrusting, while the transfer of sperm requires just a single intromission. Why did thrusting evolve to be the dominant form of sexual intercourse? In this study, we investigate how the rate of sexual pelvic thrusting changes with body size. By analyzing films of copulating mammals, from mice Mus musculus to elephants Elephantidae, we find that bigger animals thrust slower. The rate of pelvic thrusting decreases from 6 Hz for the pocket mouse Pergonathus to 1.3-1.8 Hz for humans to an absence of thrusting for the rhino Rhinocerotidae an...
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...
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...
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...
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 ...
Skill and participation enhancement in attention deficit hyperactivity disorder through equine therapy using ASTride protocol. This study evaluated the effectiveness of the Attention Skill Training (ASTride) protocol-an Equine-Assisted Occupational Therapy (EAOT) intervention-in improving participation, performance skills, and daily function among children with Attention Deficit Hyperactivity Disorder (ADHD). Unassigned: A prospective cohort study with an Interrupted Time-Series design was conducted with 50 children (mean age = 9.51 years, Standard Deviation = 1.52) diagnosed with ADHD. Assessments were conducted at baseline (Time 1), pre-intervention (Time 2), post-intervention (Time 3), and three-month follow-up (...
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...
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...
Using an Equine Cadaver Head to Investigate Associations Between Sub-Noseband Space, Noseband Tension, and Sub-Noseband Pressure at Three Locations. Pressures applied to horses via nosebands are of growing concern. The current study applied noseband pressure to the head of a dead horse. Pressure sensors were placed on the left nasal bone to record pressures as the noseband was progressively tightened. Tightness increased as predicated by holes in the strap of the noseband (as supplied) through eight steps from two fingers' space, assessed using the standard International Society for Equitation Science Taper Gauge through to zero space. Sensors were also placed at the midline frontal plane and intra-orally at the level of the second premola...
Equine-assisted interventions in Germany: animal welfare knowledge and practices among equine-assisted professionals. Numerous studies have shown the positive effects that horses in equine-assisted interventions can have on a variety of recipients. The importance of animal welfare and implementation of animal welfare practices in equine-assisted interventions has not yet been extensively researched. Objective: The aim of this exploratory study was therefore to investigate the understanding of animal welfare from the perspective of equine-assisted professionals and how it is ensured by them. Methods: 111 equine-assisted professionals in Germany were surveyed about their knowledge of animal welfare and the indi...
Non-contrast enhanced visualization of the equine foot vasculature in a cadaver model using time-of-flight sequence. The objective of this study was to establish a non-contrast enhanced MR angiography (NC-MRA) sequence for the equine foot (EF) using a post-mortem angiography model. Unassigned: Time-of-flight (TOF) sequences were tested using variable parameter settings and 3 slice orientations during vascular perfusion of frozen-thawed cadaver EF with paraffine oil. Transverse and dorsal orientations were planned perpendicular or parallel to the sublamellar vascular plexus at the dorsal aspect of P3, or approximately perpendicular to the coronary plexus. Visibility of the coronary plexus, sublamellar plexus,...
Hair whorl traits associated with temperament in donkeys. Hair whorl is a trait that has been associated with temperament in horses and cattle. In horses, whorl traits have been linked to behavior, temperament, and laterality. However, there are no studies with donkeys, which is the aim of the present study. Thirty-seven donkeys of the Nordestino ecotype were used. The following hair whorl traits were recorded: number, position and rotation on the head and number on neck and chest. The reaction of animals to a new object was measured by flight direction, flight distance, latency and flight score. Animals with clockwise whorls tended to escape to the ...
Preliminary investigation of the effect of ferulic acid on miRNAs and LncRNAs in Mongolian horse skeletal muscle satellite cells. Ferulic acid (FA), a natural antioxidant, has attracted considerable attention for its regulatory potential in skeletal muscle development, energy metabolism, and muscle fiber type transformation. Unassigned: This study established a research system based on Mongolian horse skeletal muscle satellite cells to elucidate the molecular basis by which ferulic acid regulates muscle fiber type transformation through a non-coding RNA interaction network. Unassigned: A total of 18 differentially expressed miRNAs (DEMIRs) and 128 differentially expressed lncRNAs (DELs) were identified through transcript...
Cardiac arrhythmia prevalence and risk factors in 24-h electrocardiograms of sedentary horses. Cardiac arrhythmias are common in horses, but their clinical relevance remains controversial. Objective: To describe prevalence and identify risk factors for arrhythmias that may warrant additional screening in a sedentary mixed-breed population of horses. Methods: Prospective cross-sectional. Methods: Ninety-four clinically healthy, university-owned, sedentary horses underwent 24-h ambulatory electrocardiograms and echocardiograms. Potential risk factors were recorded for all horses. Affected individuals were defined as those with >1 supraventricular premature complex/h or with any ventric...
Orientin Reverses Premature Senescence in Equine Adipose Stromal Cells Affected by Equine Metabolic Syndrome Through Oxidative Stress Modulation. Equine metabolic syndrome (EMS) is a prevalent endocrine disorder associated with insulin dysregulation, oxidative stress, and impaired regenerative capacity of adipose-derived stem cells (ASCs). The aim of this study was to evaluate the effects of orientin-a plant-derived flavonoid with known antioxidant properties-on equine ASCs (EqASCs) derived from both clinically healthy and diagnosed EMS-affected mares. EqASCs were treated with orientin to evaluate its biological effects. The analysis included key cellular functions such as proliferative capacity, viability, apoptosis, oxidative stress, ...
Characterization of Corynebacterium uterequi isolates from mares in Brazil. The genus Corynebacterium encompasses versatile bacteria that act as natural microbiota or pathogens, causing infections in humans and animals, including equine reproductive disorders. Corynebacterium uterequi (C. uterequi) is a potential pathogen in mares, associated with reproductive disorders including endometritis, embryonic loss, and infertility, raising concerns for equine reproductive health. This study aimed to characterize C. uterequi isolates from mares in southern Brazil and deepen the understanding of this species. Phenotypic, molecular, and phylogenetic analyses were performed on ...
Ferulic acid mediates Mongolian horse skeletal muscle fiber remodeling through PDK1. Ferulic acid (FA), a natural antioxidant and major active component in Angelica sinensis, has beneficial effects on skeletal muscle health; however, its role in modulating muscle fiber type composition Mongolian horse remains unclear. In this study, we found that FA promotes the proliferation of Mongolian horse skeletal muscle satellite cell (MuSCs), upregulates the expression of fast-twitch muscle marker genes (e.g., MYH2), and downregulates the expression of slow-twitch markers (e.g., MYH7). RNA-seq revealed that FA activates the HIF-1 signaling pathway, significantly increasing PDK1 express...
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