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A new smartphone-based digital stethoscope featuring phonocardiography and electrocardiography in adult horses. Smartphone-based technology is increasingly used in veterinary medicine as a complementary tool for cardiac auscultation and ECG recording. This prospective observational study evaluates a digital stethoscope (DS) that consists of simultaneous phonocardiographic and one-lead ECG recording (dECG) in adult horses, comparing it with auscultation using a conventional stethoscope (CS) and reference base-apex ECG (rECG). A total of 104 horses underwent cardiac auscultation using CSs and DSs to detect arrhythmias and murmurs. Audio and dECG were acquired using the DS. The rECG tracings were also reco...
Case report: Incomplete bypass ileocolostomy without partial typhlectomy in five horses with acute, non-reducible cecocolic intussusceptions and review of literature. Cecocolic intussusceptions are a rare condition of acute colic in horses requiring immediate surgical intervention due to persistent uncontrollable pain and ongoing ischemic cecal necrosis. Particularly in cases where reduction of the intussusception is surgically not feasible surgical interventions such as partial typhlectomy through colotomy (partial cecal amputation) combined with or without cecal bypass techniques are described. Alternatively, surgical interventions can also be performed without partial typhlectomy via incomplete bypass ileocolostomy. Information regarding applicable techn...
Effects of Hyperthermia and Acidosis on Mitochondrial Oxidative Phosphorylation. The intracellular environment of skeletal muscle can develop pronounced hyperthermia and acidosis during strenuous exercise, and these alterations in the typical intracellular conditions have been shown to alter mitochondrial respiration. However, the impact of these conditions on ATP synthesis is poorly understood. We used Thoroughbred racehorses to test the hypothesis that both hyperthermia and acidosis decrease the rate of ATP synthesis, but that athletic conditioning mitigates this loss of phosphorylation capacity. Isolated mitochondria were harvested from skeletal muscle before and after ...
Clinical and morphological features of corneal lymphoma in 26 horses (27 eyes). Little information describing the biologic behaviour and therapies for corneal lymphoma exist. Objective: To characterise histologically confirmed equine corneal lymphoma considering breed, age or sex predisposition, histologic and immunologic features, therapies and outcomes. Methods: Retrospective case series. Methods: A multicentre retrospective medical record review was used to identify horses that presented with corneal disease confirmed morphologically as corneal lymphoma from 2012 to 2022. Results: Mean age at diagnosis was 10.5 years. Males represented 18/26 cases. Warmblood (14) and...
Injury Patterns and Associated Demographic Characteristics in Children with a Fracture from Equines: A US National Based Study. Fractures often occur due to equestrian activities with injury patterns varying by age. The purpose of this study was to investigate in detail fracture patterns and associated demographics in children due to equine activities. Methods: The US National Electronic Injury Surveillance System was queried for all injuries with the consumer product code 1239 (horseback riding) from 2000 to 2023. Those <16 years old with fractures were extracted. Statistical analyses were performed with SUDAAN 11.0.01™ software to obtain national estimates. Results: There were an estimated 101,677 patients with a f...
Pergolide mesylate administration does not decrease blood thyroid hormone concentrations and thyroid function in horses. Pergolide, labeled for the treatment of pituitary pars intermedia dysfunction, is 90% protein bound and might cause a decrease in blood thyroid hormone concentrations by displacing them from binding proteins. This study investigated the effect of pergolide on the equine thyroid function. Methods: This was an analytic, observational, cohort study. Six horses (17 to 24 years old and 530 to 599 kg) received 1 mg of pergolide mesylate orally once a day from days 1 to 6. Total T4 (tT4) was measured daily from day 0 to 11 (before, during, and after pergolide treatment). Thyrotropin-releasing hormone...
Reference intervals for equine fecal calprotectin and calprotectin:protein ratio and preliminary clinical evaluation in horses with colic and colitis. To establish the reference interval (RI) of fecal calprotectin (fCP) and fCP:protein ratio in the feces of healthy horses and demonstrate preliminary clinical utility for the quantification of intestinal inflammation. Methods: Feces were collected from healthy horses (n = 103) and horses with colic (n = 15) or colitis (n = 13). Feces were suspended in buffer to create fecal supernatant. Fecal calprotectin concentration was determined by ELISA, fecal total protein concentration was determined by bicinchoninic acid assay, and the fCP:protein ratio was calculated. Reference intervals for fCP and ...
Molecular Investigations of Babesia caballi from Clinically Healthy Horses in Southwestern Romania. is a tick-borne hemoparasite that causes equine piroplasmosis. It has a significant economic impact, decreasing performance and affecting animal welfare. This study aimed to identify DNA in the blood of horses from households in the southwestern and western regions of Romania. We included 310 animals, from which blood was collected via EDTA. To test the samples for the parasite genome, we used real-time PCR and conventional PCR. The prevalence of was 5.81% (18/310) in apparently healthy horses, suggesting that this parasite is enzootic in the regions studied, although veterinarians did not...
A review of the equine suspensory ligament: Injury prone yet understudied. The suspensory ligament (SL) is a key component of the elaborate and highly adapted suspensory apparatus in the horse. In addition to contributing to stabilisation of the metacarpophalangeal joint, the SL has a spring like function to reduce the energetic cost of locomotion. Although the SL is highly prone to injury in horses of all ages and competing in a wide range of disciplines, knowledge regarding fundamental structure-function relationships in the SL is lacking, particularly compared with other injury-prone tendinous structures such as the superficial digital flexor tendon. In this revie...
Challenges for the veterinary profession: A grounded theory study of veterinarians’ experiences of caring for older horses. In Great Britain, owners are keeping their horses into increasingly older age, reflecting societal changes in human-animal relationships. The uptake of routine veterinary services is reported to reduce as horses age. Horse owners seek information regarding their animal's health from alternative sources before and/or following veterinary involvement. Information regarding the experiences and behaviours of veterinarians toward older horse health care provision is limited. Objective: This study sought to explore how veterinary care for the ageing horse is conceptualised and approached by veterina...
A Pilot Study to Assess the Safety and Efficacy of Umbilical Cord Blood-Derived Mesenchymal Stromal Cells for the Treatment of Synovitis in Horses. Synovitis is present before and during osteoarthritis in horses and can result in performance-limiting lameness. Twenty-four horses with lameness localized to the metacarpo-/metatarsophalangeal joint or a single joint of the carpus were enrolled in this study. We evaluated the response of intra-articular injection with 10 million activated (aMSC) or non-activated (naMSC) allogeneic equine umbilical cord blood-derived mesenchymal stromal cells (MSCs). Subjective and objective lameness was assessed on Days 0, 1, 21, and 42. The treatment injection was randomly assigned and performed following th...
The effect of intramuscular atipamezole on head height and sedation scores in detomidine-sedated horses. To assess the effect of two different doses of intramuscular atipamezole on head height (HH) in horses after sedation with detomidine. Methods: Randomized, blinded, triple crossover study. Methods: Eight healthy adult horses. Methods: Baseline HH was measured before detomidine (40 μg kg) was injected intravenously. HH was measured at 10 and 20 minutes after injection. Then, saline, atipamezole 60 μg kg (AT60) or 120 μg kg (AT120) was injected intramuscularly. HH measurements were repeated at 10 minutes intervals for 100 minutes. HH data were analyzed with a linear mixed model. Significance ...
Niosomal nanocarriers loaded with artemisinin has potential to enhance the functional characteristics of cryo-preserved equine spermatozoa. Cryopreservation is a crucial method for the preservation of genetic materials. Nevertheless, this technique can have adverse effects due to cryo-oxidative damage. The primary objective of this study was to investigate the cryo-protective effects of niosomal nanocarriers loaded with artemisinin (NN-Art) on the functional attributes of equine spermatozoa. The parameters examined included sperm motility and kinematics through computer-assisted sperm analysis (CASA), plasma membrane integrity via the hypoosmotic swelling test, viability using the eosin-nigrosin staining technique, morphology with...
Changes in blood physiological and biochemical parameters and intestinal flora in newborn horses and mares with angular limb deformities. Angular limb deformities (ALDs) are a common skeletal development disorder in newborn foals. This condition affects the growth and development of foals and severely impacts their future athletic performance and economic value, causing significant financial losses to the horse industry. Placentitis, metritis, and severe metabolic diseases during mare pregnancy are significant causes of ALDs in newborn foals. It has been established that intestinal flora disorders can easily lead to inflammatory and metabolic diseases in the host. However, the incidence of ALDs in foals in Zhaosu County, Xinjian...
Phenotypic, Biochemical and Molecular Characterization of Streptococcus equi Isolates in Northern India. poses a significant threat to equine health globally. The bacteria causes strangles, a respiratory disease characterized by enlarged, abscessed lymph nodes, leading to airway obstruction. The bacterium, a Gram-positive, chain-forming, Lancefield group C β-hemolytic , is closely related to and distinction between these species is challenging. The present study focused on characterization of isolates from horses in northern India, aiming at elucidation of their sugar fermentation patterns. Nasal and nasopharyngeal swabs collected from different geographical regions of northern India, yieldin...
Seroepidemiological study of Neospora caninum in equids using c-ELISA in Erbil Province, Iraq. Equine neosporosis is an intracellular protozoan disease with a global distribution, affecting a diverse range of warm-blooded animals. Neospora caninum Dubey, Carpenter, Speer, Topper et Uggla, 1988 is associated with foetal loss, neurological disease and abortion in equids. No information was available regarding equine N. caninum infection among equids in Iraq. Thus, the aim of this study was to determine the prevalence rate of N. caninum in equines by using a competitive enzyme-linked immunosorbent assay (c-ELISA). A total of 329 blood samples randomly selected from equines, comprising 268 ...
Nutraceutical Supplement Mitigates Insulin Resistance in Horses with a History of Insulin Dysregulation During a Challenge with a High-Starch Diet. Insulin dysregulation (ID) is associated with an increased risk of laminitis which often necessitates the need for clinical intervention. To test the contention that the prophylactic supplementation of nutraceuticals could mitigate ID in susceptible horses, 16 mature horses with a history of ID were supplemented with either the placebo (n = 8) or nutraceutical (n = 8) once daily. Horses were housed in dry lots with ad libitum access to grass hay and fed a concentrate twice daily to provide 0.5 g starch/kg BW/meal. A combined glucose-insulin tolerance test was performed on all horses before and...
Changes in equine strongylid communities after two decades of annual anthelmintic treatments at the farm level. The aim of this study was to assess the changes in strongylid communities of domestic horses after two decades of regular anthelmintic treatments; the changes in prevalence and relative abundance of individual strongylid species and their contribution to the observed alterations were estimated. The study was conducted in 2023; data collected in 2004 were used for comparison; 39 horses from two farms in Ukraine (22 horses in 2004 and 17 in 2023) were examined. In total, 18,999 strongylid specimens were collected by in vivo diagnostic deworming method before (in 2004, 9119 specimens) and after (...
Doping Control Analysis of Total Carbon Dioxide (TCO2) in Equine Plasma by Headspace Gas Chromatography-Mass Spectrometry (HS-GC/MS). The use of alkalinising agents prior to racing for manipulating performance in the horse has been identified since the 1990s. To mitigate the risk, an international threshold for available carbon dioxide in equine plasma based on analyses using the Beckman Synchron EL-ISE analyser was adopted in 1994 by the International Federation of Horseracing Authorities (IFHA) and revised from 37 to 36 mM in 2004. In 2009, the technical support for the above instrument was discontinued by its manufacturer. Based on the same measurement principle (i.e., ion selective electrode), the Beckman DxC600 analys...
Nutraceutical Supplement Mitigates Insulin Resistance in Horses with a History of Insulin Dysregulation During a Challenge with a High-Starch Diet. Insulin dysregulation (ID) is associated with an increased risk of laminitis which often necessitates the need for clinical intervention. To test the contention that the prophylactic supplementation of nutraceuticals could mitigate ID in susceptible horses, 16 mature horses with a history of ID were supplemented with either the placebo (n = 8) or nutraceutical (n = 8) once daily. Horses were housed in dry lots with ad libitum access to grass hay and fed a concentrate twice daily to provide 0.5 g starch/kg BW/meal. A combined glucose-insulin tolerance test was performed on all horses before and...
Smartphone-based ECG assessment of heart rhythm at birth in healthy foals born after spontaneous or induced parturition: is there a potential difference? Background- Subclinical electrophysiological derangements occur at birth in foals. Smartphone-based ECG (spECG) is practical tools to assess heart rhythm and was recently validated in foals. Objectives-To assess the heart rate (HR) and rhythm at birth in clinically healthy foals born after spontaneous and induced parturition using a spECG. Animals- Newborn healthy foals born after at term spontaneous (SF) or induced foaling (IF). Methods- Cohort study. In SF and IF groups, a spECG was performed immediately at birth (T0) and after 5 min (T5). SpECG tracings were selected for quality. HR was ma...
Fenestration of the maxillary septal bulla using different surgical approaches and endoscopy systems in horses: An ex vivo study. Sinusitis is common in horses. Sinoscopy is used for visualization of sinus cavities and can be used for diagnostic and therapeutic purposes. In this surgical procedure, a larger chamber is created and communication with other sinus compartments facilitated. To compare the applicability of different surgical approaches and rigid endoscopy systems for sinus inspection and fenestration of the maxillary septal bulla, and to examine the impact of different lens angles on the effectiveness of the procedure. Six chemically preserved cadaveric equine heads were used. Frontal and caudal maxillary port...
Oocyte holding and in vitro maturation duration between 28 and 34 hours do not affect equine OPU-ICSI outcomes. Previous studies in the horse highlight the potential benefit of prolonged in vitro maturation (IVM) (34 h) compared to short IVM (24 h) with or without prior oocyte holding, but little is known about the optimal IVM duration within this interval. To determine the effect of oocyte holding and duration of IVM ranged between 28 and 34 h on nuclear maturation, cleavage, blastocyst formation, and pregnancy rates, a retrospective study was performed in an equine clinical OPU-ICSI setting. The study included data of 2114 aspirated oocytes from 201 OPU-ICSI sessions. Duration of IVM was divided in...
Effect of phenylbutazone administration on the enteroinsular axis in horses with insulin dysregulation. Phenylbutazone is prescribed for laminitis-associated pain and decreases glucose and insulin responses to an oral glucose test (OGT) in horses with insulin dysregulation (ID). Objective: Investigate the effect of phenylbutazone administration on the enteroinsular axis in horses. Methods: Sixteen horses, including 7 with ID. Methods: Randomized cross-over study design, with horses assigned to treatment with phenylbutazone (4.4 mg/kg IV q24h) or placebo (5 mL 0.9% saline). On Day 9 of treatment, an OGT was conducted, followed by a 10-day washout period, administration of the alternative trea...
Anesthesia for non-obstetric surgery during late term pregnancy in mares. Submitting late-term pregnant mares to anesthesia for non-obstetric surgery raises concerns about the survival of the mother and fetus. This study aimed to evaluate and describe transient maternal and fetal hemodynamic changes during general inhalation anesthesia in mares during the last month of gestation. Nine adult mares in the last month of gestation were subjected to general inhalation anesthesia and dorsal recumbency for 90 minutes. Trans-anesthetic vital parameters, arterial hemogasometry, cardiac output, pulmonary arterial pressure, central venous pressure, and fetal heart rates were a...
A machine learning approach to identify stride characteristics predictive of musculoskeletal injury, enforced rest and retirement in Thoroughbred racehorses. Decreasing speed and stride length over successive races have been shown to be associated with musculoskeletal injury (MSI) in racehorses, demonstrating the potential for early detection of MSI through longitudinal monitoring of changes in stride characteristics. A machine learning (ML) approach for early detection of MSI, enforced rest, and retirement events using this same horse-level, race-level, and stride characteristic data across all race sectionals was investigated. A CatBoost model using features from the two races prior to an event had the highest classification performance (sensitiv...
Complete genome sequences of toxigenic Clostridioides difficile isolated from Australian feral horses. Recent increases in community-associated Clostridioides difficile infections have highlighted the importance of monitoring toxigenic C. difficile from animal and environmental sources. We provide the complete circularized genomes of two toxigenic C. difficile strains isolated from feral horse faeces. Genome N64 (sequence type 964) consists of a single chromosome of 4,078,791 bp, while genome H251 (sequence type 963) comprises one chromosome (4,304,722 bp) and three plasmids (150,942 bp, 11,534 bp, and 9,074 bp).
Treatment of mycotic rhinitis caused by aspergillus fumigatus in a quarter horse mare using topical clotrimazole and oral potassium iodide. Fungal rhinitis in horses is rare, although severe, due to the progressive nasal obstruction. Aspergillus is one of the fungi most often involved in these cases. A 7-year-old Quarter Horse mare weighing 325 kg was admitted with a history of recurrent nasal discharge and bleeding, foul smell, reluctance to exercise, and abortion. Laboratory and imaging examinations revealed eosinophilia, scarring and erosion areas in the nasal mucosa, purulent and bloody secretions, and remarkable yellowish plaques. Histopathological examination revealed fungal rhinitis and bacterial culture revealed the prese...
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