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Multiple Probiotic Lactic Acid Bacteria with Marked Cholesterol-Lowering Effects Were Discovered in Equine Colostrum. Xinjiang ranks among the key domestication origins of horses. Local nomadic ethnic groups have a long-standing tradition of consuming equine dairy products, which endows mare-derived dairy matrices with abundant, distinctive and scarce probiotic resources. Equine colostrum is rich in immunoglobulins and growth factors; nevertheless, its pharmacological activities and micro-ecological composition remain poorly characterized. This study aimed to isolate and screen native strains with cholesterol-lowering potential from Xinjiang equine colostrum and conduct a preliminary investigation into their ...
Molecular Survey and Genetic Characterization of Tetratrichomonas buttreyi and Pentatrichomonas hominis in Horses in Shanxi Province, Northern China. Trichomonads include species of veterinary and zoonotic importance, yet infections with trichomonads in horses remain uncharacterized in Shanxi Province, Northern China. In the present study, we conducted a molecular survey of and using 631 horse fecal samples collected from Datong, Taiyuan, and Yuncheng cities in Shanxi Province between March and June 2023. Nested PCR assays targeting the small subunit ribosomal RNA (SSU rRNA) gene were used to detect the two trichomonad species. The overall molecular prevalences were 3.7% (23/631; 95% CI, 2.5-5.5%) for and 0.8% (5/631; 95% CI, 0.3-1.9%) f...
Agreement between invasive and oscillometric blood pressure measurements during controlled haemorrhage in anaesthetised horses. Defining the reliability of oscillometry (NIBP) for measuring mean arterial pressure (MAP) during normotension and hypovolaemic hypotension could help with cardiovascular monitoring and management in horses anaesthetised in dorsal recumbency. Objective: To assess agreement between NIBP and invasive MAP during normotension and hypovolaemic hypotension in dorsally-recumbent, anaesthetised horses. Methods: Prospective experimental study using 11 horses. Methods: Under isoflurane anaesthesia, blood was removed at 5 mL/kg bwt increments up to 25 mL/kg bwt and returned in a similar fashion. Pair...
Equine piroplasmosis in China, 2000 to 2025: a systematic review and meta-analysis of prevalence and risk factors. Equine piroplasmosis (EP) is a tick-borne disease of equids caused by Theileria equi, Babesia caballi, and Theileria haneyi. We conducted a PRISMA-guided systematic review and meta-analysis to estimate pooled prevalence in China and identify associated risk factors. PubMed, Web of Science, ScienceDirect, CNKI, Wanfang, and VIP were searched through 15 August 2025. Of 2,626 records identified, 80 studies met the inclusion criteria. Random-effects models were used to pool prevalence estimates, and prespecified subgroup analyses and univariate meta-regression were used to explore heterogeneity an...
Ortholog-specific Spatial Expression of Vanins in the Respiratory Tract of Horses. Equine asthma (EA) is the most prevalent chronic respiratory disease in horses, but molecules thought to be relevant in its pathogenesis are not yet fully understood. Recently, increased Vanin-1 (VNN1) levels were found in bronchoalveolar lavage fluid from horses with severe EA. Human VNN1 is known as a pantetheinase, which is associated with respiratory diseases such as asthma, but the equine vanins (eVNNs) are uncharacterized. We identified the domain architecture of eVNN in silico and analyzed its tissue expression in healthy horses using RT-PCR (=5) and in situ hybridization (=3). Recombin...
hCG promotes secondary ovulation and supplementary corpus luteum formation during early pregnancy in mares. This study evaluated whether the administration of human chorionic gonadotropin (hCG) during early pregnancy accelerates ovulatory dynamics and alters serum progesterone concentrations in mares with dominant follicles. Thirty pregnant embryo-recipient mares with follicles ≥35 mm during early gestation were randomly assigned to receive either 1500 IU hCG IV (hCG group; n = 17) or saline solution IV (control group; n = 13). Mares were monitored by serial ultrasonography to determine the ovulatory response and the interval to secondary ovulation. Serum progesterone concentrations were...
Centrifugation of peritoneal fluid improves visual assessment of strangulating lesions in equine colic. Early and accurate recognition of a strangulating lesion is essential to expedite surgical intervention in horses presenting with colic. Objective: To evaluate the use of a colour grading scale in the visual assessment of peritoneal fluid, before and after centrifugation, and assess its ability to predict the presence of a strangulating lesion. Methods: Prospective clinical study. Methods: Peritoneal fluid samples from 231 equids presenting with colic were visually analysed immediately after collection and assigned a numerical value based on a developed colour scale. Peritoneal fluid was centr...
Race Performance Following Arthroscopic Surgery for Femoropatellar and Tarsocrural Osteochondrosis in Juvenile Thoroughbreds. The objective of this study is to evaluate racing performance of Thoroughbred yearlings following arthroscopic surgery for osteochondrosis (OC) of the femoropatellar (FP) and tarsocrural (TC) joints. Unassigned: This is a retrospective study of Thoroughbreds 0.05). In both groups, no significant performance differences were found between unilateral and bilateral cases ( > 0.05). Unassigned: Racing performance after FP or TC OC surgery was comparable to that of unaffected controls. Bilateral cases performed as successfully as unilateral.
Successful outcome of open distal interphalangeal joint luxation in equids treated by surgical debridement without internal implants. The distal interphalangeal joint (DIPJ) plays a crucial role in the function of the hoof and digit. Dislocations and subluxations in this region are rare and primarily of traumatic origin. Methods: This case report aims to describe two unusual cases of open DIPJ dislocation, including clinical presentation, diagnostic workup, treatment, and long-term follow-up. Both animals presented with open traumatic distal interphalangeal joint (DIPJ) luxation. In Case 1, the animal received initial care on the property 5 h post-trauma and presented with joint exposure and articular surface contact with th...
Airway Lipid Mediators in Horses: Baseline Bronchoalveolar Lavage Fluid Profiles and Effects of EPA and DHA-rich Microalgae Oil Supplementation. We investigated how dietary omega-3 polyunsaturated fatty acids (n-3 PUFAs) eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) affect airway inflammation, bronchoalveolar lavage fluid (BALF) lipid mediators and red blood cell fatty acids in horses. Increased BALF neutrophils are a hallmark of airway inflammation, commonly associated with equine asthma. The long-chain n-3 PUFAs EPA and DHA are essential nutrients and precursors of specialized pro-resolving mediators (SPMs) that regulate inflammatory responses. In this prospective field trial, we assigned horses to three diets, including...
An exploratory comparative analysis of kinematic characteristics in two elite Chinese show jumping riders. Three-dimensional rider kinematics across jumping phases and obstacle heights remain sparsely documented in elite Chinese show jumping. This exploratory case study examined angle-related kinematic characteristics in two elite Chinese riders under field-based jumping conditions. Unassigned: Three-dimensional video-based kinematic analysis was performed using the Simi Motion 3D system with direct linear transformation (DLT)-based camera calibration and three-dimensional reconstruction of selected anatomical landmarks. Two elite male riders rode the same experienced horse over the second vertical...
Proof of concept for low dose and delayed release of tigilanol tiglate in the treatment of equine sarcoids. Intra-tumoural administration of tigilanol tiglate has been shown effective in local treatment of cutaneous equine neoplasias. The drug causes rapid oncolysis and tumour slough, but may also be associated with comorbidities in sensitive and/or intricate anatomical sites due to its initial pro-inflammatory mode of action. Here we describe two approaches to optimise and further de-risk treatment of equine sarcoids with tigilanol tiglate, especially in difficult locations. Firstly, we provide preliminary clinical and observational data on the efficacy of low dose administration of tigilanol tigla...
Hidden Tarsal Lesions: The Role of Flexed and Oblique Radiographs in Young Horses. Radiographically apparent tarsal lesions associated with developmental orthopedic disease and joint sepsis are common in young horses. Standard radiographic projections are routinely used to identify osseous changes but may fail to detect lesions due to superimposition and complex anatomy. This retrospective case series describes plantar trochlear ridge lesions in young horses that were not identified on standard four projection radiograph series but were detected using flexed lateromedial and flexed oblique projections. Cases were selected based on persistent clinical signs localizing to the ...
Veterinarian and breeder perspectives surrounding ovum pick-up and intracytoplasmic sperm injection in mares: A survey study. There is an ethical debate about the application of ovum pick-up (OPU) and intracytoplasmic sperm injection (ICSI) in mares. Objective: To survey the opinions of equine veterinarians and breeders of sport horses on the ethics of using OPU-ICSI in mares. Methods: Cross-sectional descriptive study. Methods: Three surveys were distributed. The first targeted breeders ('Breeder Survey') who were actively involved in sport horse breeding. The second targeted veterinarians performing OPU ('OPU-Reprovets Survey'). The third targeted general equine practitioners ('Practitioner Survey'). There were six...
Seizures and blindness onset zone in 7 horses undergoing radiographic myelography in lateral recumbency under inhalation anesthesia. Seizures and blindness are potential complications associated with myelography. Objective: Describe, classify, and determine onset zone of seizures and blindness in horses undergoing radiographic myelography in lateral recumbency. Methods: Seven young adult horses. Methods: Retrospective study. Horses with seizures or blindness associated with myelography were included. Results: Three horses with general proprioceptive ataxia and 4 neurologically normal horses (Warmblood = 4, Thoroughbred = 3), ages 9 (range, 3-16) years old. Iohexol (300 mg I/mL) from 50 to 60 mL (0.09-0.1 mL/kg) were ...
Histological differences in the placenta of three mares treated for ascending bacterial placentitis compared to physiological pregnancies. Ascending bacterial placentitis is a frequent cause of late pregnancy loss in mares. The histology of placentitis has been described but mainly with a focus on inflammatory changes. In this study, we assessed several aspects beyond inflammatory processes between mares foaling close to term during treatment for placentitis and physiological pregnancies. We included placental tissue from physiological term pregnancies (group PP; n = 8) and clinical cases with confirmed ascending bacterial placentitis (group PL; n = 3). Samples were collected from several locations of the allantochorion (cerv...
Development and Evaluation of an Indirect ELISA for Strangles Based on an Untagged EQ8-SclF Fusion Protein. Strangles, caused by subsp. (), is a highly contagious respiratory disease that causes substantial economic losses to the horse industry worldwide. Serological diagnosis currently relies mainly on the imported IDvet dual-antigen sandwich ELISA kit, which shows good diagnostic performance but is expensive and lacks a domestic alternative in China, thereby limiting its routine use in primary veterinary settings. The aim of this study was to develop a domestic indirect ELISA based on novel antigen targets and an untagged antigen purification strategy. Using comparative bioinformatics analyses, ...
Computed Tomographic Lesion Descriptors in Foals With Hematogenous Osteomyelitis: Interobserver Agreement and Association With Outcome. Computed tomography (CT) is increasingly used to diagnose osteomyelitis in foals, but the prognostic value and interobserver reproducibility of specific CT lesion descriptors remain unclear. This multicenter retrospective study aimed to characterize CT features of hematogenous osteomyelitis in foals using a structured radiologic feature set, assess interobserver agreement, and evaluate associations between CT descriptors and survival to hospital discharge and long-term survival. We hypothesized that CT features considered aggressive, including a long transition zone, permeative or moth-eaten o...
An atypical extrapulmonary presentation of rhodococcus equi infection in a foal: a case report. Rhodococcus equi infection in foals is primarily associated with pulmonary disease but may also present with extrapulmonary manifestations (Giguère et al. 2011; Reuss et al. 2009). Hemolytic anemia is a rare and poorly described complication, with only a single previous report of presumed immune-mediated hemolytic anemia in foals affected by R. equi. This case report describes the clinical presentation, diagnostic findings, disease progression, and postmortem examination of a 4-month-old Holsteiner foal with confirmed R. equi infection and severe anemia consistent with a presumed immune-media...
Serum physiology, fecal microbiota, and metabolome signatures associated with perinatal stage transitions in Mongolian mares. Lactation is a critical reproductive trait that influences offspring survival and livestock productivity in equine production. Characterizing physiological transitions during the perinatal period can improve our understanding of how mares adapt to late gestation, parturition, and early lactation. However, in horses-a typical monogastric herbivore with unique digestive characteristics-the associations between gut microbiota and perinatal physiological adaptation, as well as related stage-associated microbial and metabolic features, remain largely uncharacterized. Unassigned: In this study, para...
Circulating Cell-Free RNA Reflects Immune-Associated and Airway Remodeling Signatures in Equine Asthma. Circulating cell-free RNA (cfRNA) has emerged as a promising minimally invasive biomarker capable of capturing transcripts originating from multiple tissues and cell types, but its utility in chronic inflammatory airway diseases remains poorly understood. Equine asthma (EA), a naturally occurring respiratory disease that shares key clinical and immunopathological features with human asthma, provides a valuable comparative model for evaluating plasma cfRNA in this context. We performed transcriptomic profiling of plasma cfRNA from horses with EA and healthy controls and compared these findings ...
Limb position, not exercise or sedation, affects power Doppler neovascularization detection in equine superficial digital flexor tendon core lesions. To determine the effect of limb position, exercise, and sedation on neovascularization detectability with the use of power Doppler ultrasonography (PDU) in superficial digital flexor tendon core lesions of the equine forelimb. Unassigned: 9 Thoroughbred horses with superficial digital flexor tendon core tendinopathies were assessed with PDU before lesion induction (week 0) and 12 weeks after lesion induction, with 5 horses in the study period ranging from January to April 2024 and 4 horses from January to April 2025. During weeks 0 and 12, ultrasound examinations were performed 24 hours apart,...
Selective oncolytic activity of newcastle disease virus in equine sarcoid primary cells: a preclinical investigation. Equine sarcoids are the most common skin tumors in horses and are characterized by local invasiveness, high recurrence rates, and inconsistent responses to current therapies. Oncolytic virotherapy represents a promising alternative approach that exploits defects in antiviral signaling pathways in tumor cells. Newcastle disease virus (NDV), an avian paramyxovirus that is nonpathogenic in mammals, has demonstrated tumor-selective activity in several species; however, its effects on equine sarcoids have not been previously investigated. In this study, primary cell cultures derived from equine sar...
Evaluating ex vivo toll-like receptor agonist response as a potential biomarker in equine gastric ulcer syndrome. Equine gastric ulcer syndrome (EGUS) is highly prevalent in horses. Despite its presumed painful nature, evaluation of objective biomarkers associated with EGUS presence and severity remains limited. The objective of this study was to investigate the potential of interleukin-1 beta (IL-1β) release by peripheral blood mononuclear cells (PBMCs) following ex vivo stimulation of toll-like receptors 2 and 4 (TLR2 and TLR4) as a potential biomarker for EGUS status, with gastric lesions used as a proxy for presumed EGUS-associated pain. Venous blood was collected from 77 horses, PBMCs were isolated ...
Spatial and temporal radiation exposure during equine bone scintigraphy: Implications for occupational safety and post-scintigraphy isolation. Bone scintigraphy is a valuable diagnostic modality in equine orthopaedics, but it is associated with occupational radiation exposure and regulatory requirements for post-procedural isolation. Objective: To quantify radiation dose rates emitted from horses undergoing bone scintigraphy, to evaluate the effects of distance (spatial) and time (temporal) on radiation exposure, and to derive evidence-based recommendations for post-scintigraphy isolation periods. Methods: Prospective, cross-sectional study. Methods: Twenty warmblood horses underwent musculoskeletal scintigraphy following intravenous...
Association between cytology and endoscopy of guttural pouches: a prospective study on 173 horses. Guttural pouch (GP) disorders are clinically important in horses, yet the relationship between endoscopic findings and GP cytology remains poorly defined. Objective: To establish reference cytological values for GP lavage fluid in horses and to investigate associations between inflammatory cytology and endoscopic findings. Methods: Asymptomatic racing horses sampled in the field and horses referred for investigation of respiratory disorders. Methods: Prospective cross-sectional study. Horses underwent clinical examination, upper airway endoscopy, and bilateral transendoscopic GP lavage. A GP i...
Phylogenetic and phylogeographic analysis of equine influenza in Colombia. In 2022, Colombia experienced an outbreak of equine influenza (EI) that primarily affected competition horses. Despite the epidemiological relevance of equine influenza virus (EIV) in the country, no previous phylogenetic or phylogeographic analyses based on complete genomes have been reported. Objective: To perform phylogenetic and phylogeographic analyses of complete EIV genomes obtained from horses with clinical signs in two Colombian regions between 2020 and 2023. Methods: Molecular epidemiological study based on whole-genome sequencing and evolutionary analyses. Methods: Nasopharyngeal sa...
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