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First molecular detection of Theileria haneyi infection in horses in Southern Spain.
Frontiers in veterinary science    June 4, 2026   Volume 13 1841333 doi: 10.3389/fvets.2026.1841333
Mendoza FJ, Pérez-Écija A, Suarez CE, Martínez E, Navarro A, Kappmeyer LS, Bastos RG.Equine piroplasmosis (EP) is a tick-borne disease of equids caused by the hemoparasites , and . , a close relative of that causes mild clinical signs under experimental conditions, has been reported in several countries, adding complexity to EP ecology, diagnosis, and treatment. However, its presence in Spain remains unknown, which is concerning given the country's importance in equine genetics and international trade. Hereby, we investigated the presence of in blood samples from equids in Spain. Unassigned: Blood samples from 222 equids (218 horses, two donkeys, two mules) suspected of EP a...
Mitigating and addressing complications in equine laparoscopy.
Journal of the American Veterinary Medical Association    June 3, 2026   Volume 264, Issue 9 1-9 doi: 10.2460/javma.26.01.0057
Luedke L, Hendrickson DA, Pezzanite LM, Easley JT.The purpose of this article was to report a condensed overview of current strategies for mitigating and managing complications in equine laparoscopic surgery. Minimally invasive surgical techniques have become standard in equine surgery for a variety of diagnostic and therapeutic procedures, with purported advantages including reduced postoperative pain, expedited recovery, fewer incisional complications, and enhanced visual imagery for the surgeon compared to traditional open approaches. Despite these benefits, complications can arise, and the literature demonstrates variability in definition...
The Early Ophthalmic Effects of Vatinoxan in Healthy Detomidine-Sedated Horses.
Veterinary ophthalmology    June 3, 2026   Volume 29, Issue 4 e70206 doi: 10.1111/vop.70206
Mustikka MP, Karikoski NP, Raekallio MR, Teppo ES, Pot SA, Honkavaara J.To evaluate the short-term ophthalmic effects of vatinoxan, a peripherally selective alpha2-adrenoceptor antagonist, in detomidine-sedated horses. Methods: Seven healthy horses without ophthalmic disease in a randomized, masked, two-period crossover study design, with a ≥ 7-day rest period. Methods: After a bilateral palpebral block (lidocaine 40 mg) and baseline data collection, horses received intravenous detomidine (20 μg/kg [DET]) or DET with vatinoxan (200 μg/kg [DET-VAT]). Intraocular pressure (IOP) was measured from the left eye while tear production (Schirmer tear test -1; ...
Application of Anti-Müllerian Hormone in Regulation of Ovarian Function and Its Practical Relevance for Fertility and Embryo Production in Cows and Mares.
Veterinary sciences    June 3, 2026   Volume 13, Issue 6 552 doi: 10.3390/vetsci13060552
Vernunft A, Scarlet D.In the female organism, Anti-Müllerian hormone (AMH) is produced exclusively by granulosa cells, particularly in secondary and early tertiary follicles. The amount of AMH released into the blood is proportional to the total number of follicles present in the ovaries and is therefore used to estimate the ovarian functional reserve. In both cattle and mares, a strong and highly repeatable association has also been demonstrated between AMH concentrations and antral follicle count. Therefore, AMH may serve as a biomarker with broad diagnostic utility in reproductive medicine in these species, as ...
Annual Variation in Stallion Testicular Measurements and Its Association With Hormonal Profiles and Semen Quality.
Reproduction in domestic animals = Zuchthygiene    June 3, 2026   Volume 61, Issue 6 e70244 doi: 10.1111/rda.70244
Braga TRC, Freitas ML, Martins DMV, Viu MAO, Oliveira RA.In a stallion breeding-soundness examination, testicular volume may be estimated either from total scrotal width or by measuring the height, width and length of both testes. This study aimed to determine whether testicular morphometric parameters obtained by ultrasonography fluctuate throughout the year, and whether these variations affect semen quality and hormone production in stallions located at low latitudes in the Southern Hemisphere. Eight healthy light-breed stallions were evaluated every 15 days for 1 year, encompassing the breeding (October-April) and non-breeding(May-September) ...
Assessment of knowledge, attitudes, and preventive practices for equine Endoparasite control among livestock owners in South Gondar Zone, Northwest Ethiopia: A community-based cross-sectional study.
Veterinary parasitology, regional studies and reports    June 3, 2026   Volume 73 101518 doi: 10.1016/j.vprsr.2026.101518
Alemayehu H, Alemneh T, Seyoum Z, Maru M, Ayele A.Endoparasites are a major health concern affecting equine productivity and welfare worldwide. Understanding farmers' knowledge, attitudes, and practices (KAP) toward parasite control is critical for designing effective interventions. This study assessed KAP levels among farmers in South Gondar Zone, Northwest Ethiopia, and identified factors associated with good KAP. A community-based cross-sectional study was conducted among 150 farmers. KAP scores were initially categorized into three levels (low, moderate, and high) and analyzed using chi-square (χ) tests to explore bivariate associations....
West Nile Virus in Horses as a Sentinel Host in One Health Surveillance: Epidemiological Insights and Future Perspectives.
Microorganisms    June 3, 2026   Volume 14, Issue 6 1263 doi: 10.3390/microorganisms14061263
West Nile virus (WNV) is a globally distributed mosquito-borne flavivirus with significant implications for both veterinary and public health. While horses are incidental dead-end hosts, their epidemiological role extends beyond clinical disease, as they can serve as effective sentinel hosts for detecting local viral circulation. Their frequent exposure to mosquito vectors, ability to mount measurable antibody responses, geographic stability, accessibility for monitoring, and the possibility of observation within managed owner-veterinarian systems make them particularly suitable for surveillan...
Viral Hepatitis.
The Veterinary clinics of North America. Equine practice    June 3, 2026   S0749-0739(26)00021-0 doi: 10.1016/j.cveq.2026.04.006
Tomlinson J.Since 2012, 2 viral causes of hepatitis have been identified in horses. Much remains to be discovered about their transmission, risk factors for clinical disease, diagnosis, and treatment approaches. Equine parvovirus-hepatitis has been identified as the cause of acute hepatic necrosis, previously known as Theiler's disease. Equine hepacivirus is recognized as a cause of chronic fibrosing hepatitis. Diagnosis relies on ruling out other causes of hepatitis and documenting infection by serum or liver polymerase chain reaction. There is no direct antiviral for either condition and treatments are ...
A non-trauma-focused equine-assisted intervention was associated with reductions in all four PTSD symptom clusters in treatment-resistant military veterans.
Frontiers in psychology    June 3, 2026   Volume 17 1787669 doi: 10.3389/fpsyg.2026.1787669
Kapteijn CM, Fennema RA, van Huffelen R, Endenburg N, Vermetten E, Rodenburg TB.Veterans are at greater risk of developing post-traumatic stress disorder (PTSD) and show a poorer response to first-line treatments than civilians. Although equine-assisted interventions (EAIs) represent a promising alternative for military veterans,the underlying mechanisms remain uncertain, and their effectiveness across different PTSD symptom clusters has yet to be established. This study examined the effects of a non-trauma-focused EAI on specific PTSD symptoms in treatment-resistant military veterans. Unassigned: Participants in the intervention were military veterans diagnosed with PTSD...
Molecular and parasitological evidence of Leishmania (Mundinia) martiniquensis infection in a horse from Brazil.
International journal for parasitology    June 3, 2026   104898 doi: 10.1016/j.ijpara.2026.104898
Franco Leonel JA, Silva MDD, Araujo AC, Vioti G, Borges Martins JP, Strefezzi RF, Galvis-Ovallos F, Bianchi Galati EA, Ferreira de Sousa Oliveira TM.Leishmania (Mundinia) martiniquensis is an emerging human pathogen with increasing reports of infection in domestic animals. This study describes a naturally infected mare from Brazil with no history of international travel, presenting with persistent nodular cutaneous lesions and cervical lymph node enlargement, without evidence of systemic involvement. Considering the endemicity of cutaneous and visceral leishmaniasis in the study area, as well as previous reports of equine leishmaniasis, infection by Leishmania (Leishmania) infantum was initially suspected. Anti-L. (L.) infantum antibodies ...
Prevalence, risk factors, and antimicrobial resistance of Staphylococcus aureus in equines in Egypt.
Scientific reports    June 3, 2026   Volume 16, Issue 1 17125 doi: 10.1038/s41598-026-55462-4
El-Halim MOA, Shoraba M, Gattan HS, Alruhaili MH, Selim A.Staphylococcus aureus is a common commensal organism in both humans and animals, frequently colonizing the skin and nasal cavities of healthy individuals, although it can also cause a wide range of severe infections. The present study investigated the prevalence and risk factors of S. aureus in equines, along with antimicrobial resistance patterns of methicillin-resistant S. aureus (MRSA) isolates. The results revealed a prevalence of 38.6% in nasal samples collected from equines, highlighting the organism's significant presence and potential to cause infections in these animals. A genotypic p...
Ovum pick-up in mares: Evidence review and best practice recommendations using a modified GRADE approach.
Theriogenology    June 2, 2026   Volume 264 118021 doi: 10.1016/j.theriogenology.2026.118021
Lewis N, Dini P, Spanner J, Claes A, De Grauw J, Morganti M, Daels P, Cuervo-Arango J.Ovum pick-up (OPU) is a procedure that is now performed in mares worldwide to harvest oocytes for in vitro embryo production. There is a lack of consensus surrounding best practices for various procedural elements of the technique and recently there has been an increasing focus on the welfare aspects of the procedure. Our objective was to summarize current practice and to develop guidelines for OPU in the mare, using a modified GRADE approach to optimize efficiency and mare welfare. Published evidence on various aspects of the procedure was compiled, and to supplement the relative lack of publ...
Genetic variability and associations of Trakehner and other horse populations in Lithuania.
Archives animal breeding    June 2, 2026   Volume 69, Issue 2 323-336 doi: 10.5194/aab-69-323-2026
Račkauskaitė A, Šveistienė R, Razmaitė V, Jatkauskienė V, Marašinskienė Š.To obtain genetic parameters relevant for the management of animal genetic resources, this study provides a comparative characterization of the Trakehner (TRAK) horse population in relation to four other horse populations maintained in Lithuania - Arabian (ARAB), Baltic Warmblood (BW), Lithuanian Warmblood (LW), and Zemaitukai (ZEM). These populations represent diverse histories, selection goals, and breeding practices. Pedigree data ( 22 666) and parentage verification genetic data based on blood group markers ( 1293) were used to evaluate genetic diversity, population structure, and inter-...
Cross-protective effect of a multicomponent fusion protein vaccine during a natural episode of Streptococcus zooepidemicus respiratory disease in ponies.
Equine veterinary journal    June 2, 2026   doi: 10.1002/evj.70200
Paillot R, Newton JR, Gonzalez Medina S, Frosth S, Frykberg L, Flock M, Guss B, Flock JI, Waller AS.Streptococcus equi subspecies zooepidemicus is a highly diverse opportunistic pathogen of horses, associated with respiratory disease and endometritis. Objective: To characterise S. zooepidemicus isolates recovered from young ponies during a natural episode of respiratory disease, and to determine if vaccination with Strangvac®, a vaccine against Streptococcus equi subspecies equi, conferred cross-protection. Methods: Retrospective analysis of a double-blinded placebo-controlled study involving 32 ponies (16 vaccinates and 16 placebo controls) that experienced a natural episode of respiratory...
Molecular prevalence of equine herpesvirus type 1 and equine herpesvirus type 4 in thoroughbred and Arabian horse facilities in Türkiye.
Acta veterinaria Hungarica    June 2, 2026   004.2026.01202 doi: 10.1556/004.2026.01202
Ekİncİ G, Tİmur MC, Mete A, Altınbay K, Denİz Ö, Derellİ FM, Çeşme GS, Tüfekçİ E, Onmaz AC, Güneş V, Çİtİl M, Keleş İ....Equine herpesvirus-1 and -4 are contagious viruses causing respiratory disease and reproductive losses in horses. This study aimed to determine the prevalence of EHV-1 and EHV-4 in eight Turkish stud farms using RT-PCR analysis of nasal secretions, uterine fluids and aborted foal tissues. Deep nasal swabs were collected from 443 horses showing acute-onset fever and/or clinical signs of respiratory disease. Additionally, uterine swabs and tissue samples (lung, liver, spleen, thymus, kidney, heart) were obtained from 152 abortion cases. Among symptomatic horses, EHV-1 DNA was found in 2 cases (0...
Case Report: Oral and topical chronic administration of THC-rich and CBD-rich cannabis oil as palliative care in a rescued horse with open wound, sarcoid and chronic pain.
Frontiers in veterinary science    June 2, 2026   Volume 13 1794084 doi: 10.3389/fvets.2026.1794084
Zamith Cunha R, Kuhn EH, Medeiros JLL, Medeiros GC, Amazonas E.Cannabinoid-based therapies have shown analgesic, anti-inflammatory, and wound-healing potential across veterinary species; however, clinical data on long-term use of THC-rich formulations in horses remain scarce. This case report describes the use of combined oral and topical THC-rich and CBD-rich full-spectrum cannabis oils as part of a palliative care strategy in a rescued horse with severe chronic disease. A senior mixed-breed gelding was rescued with a large, chronic ulcerative lesion of the left hind limb, severe malnutrition, non-weight-bearing lameness (AAEP grade 5/5), and refractory ...
Research Trends and Emerging Frontiers in Racehorse Genetics: A Bibliometric Analysis.
Animals : an open access journal from MDPI    June 2, 2026   Volume 16, Issue 11 1705 doi: 10.3390/ani16111705
Huang Q, Yao X, Yang X, Wang T, Li X, Shan D, Su Y, Wang J.The global horse racing industry relies heavily on elite breeding. Therefore, a molecular understanding of athletic traits is crucial for the industry's advancement. This study utilized Bibliometrix, VOSviewer, and CiteSpace to conduct a comprehensive bibliometric analysis of 869 publications in the Web of Science Core Collection (2011-2025), decoding the academic landscape and evolutionary trajectory of equine genetics. The results indicate a significant upward trend in academic output since 2019, with the United States, South Korea, and the United Kingdom emerging as the primary contributors...
Cerebral arterial mapping in the equine brain: a detailed anatomical study.
Frontiers in veterinary science    June 2, 2026   Volume 13 1828754 doi: 10.3389/fvets.2026.1828754
Al Aiyan A, Abu Hayah S, Alnahdi AF, Alshamsi A, Alshebli H, Aleissaee S, Balan R.Detailed knowledge of the cerebral arterial system in equine brain is required for advancing neuroanatomical understanding and supporting the interpretation of neurological disorders. The equine cerebrum, characterized by extensive cortical organization and functional specialization, requires a continuous arterial blood supply; however, detailed information on its arterial anatomy remains limited. This study aimed to describe the arterial supply to the equine cerebrum, including the origin, branching patterns, and distribution of the major cerebral arteries. Unassigned: Ten adult horse heads w...
Use of computer-assisted tomography for diagnosis and standing surgical reduction of progressive ethmoidal hematoma in a mare.
The Canadian veterinary journal = La revue veterinaire canadienne    June 1, 2026   Volume 67, Issue 6 626-632 
Lee S, Lee EB, Kim T, Jung JY, Kim JH, Seo JP.Progressive ethmoidal hematoma (PEH) is a rare, nonneoplastic mass occurring in the sinonasal passages of horses. An 11-year-old, pregnant Thoroughbred mare was presented with a history of intermittent nasal discharge and stertorous respiration. On examination, radiography revealed increased opacity in the sinus and nasal cavities and endoscopy identified a mass emerging from the left ethmoidal turbinate. Computed tomography (CT) showed the range and origin of the mass, indicative of PEH. A standing frontonasal flap was made under sedation, following temporary tracheostomy to secure the airway...
Short-interval longitudinal analysis of immune cell dynamics in heavy draft foals after colostrum intake.
The Journal of veterinary medical science    June 1, 2026   Volume 88, Issue 8 1134-1143 doi: 10.1292/jvms.26-0023
Yoshida S, Takeyama A, Maeda Y, Nambo Y.Maternal cells and antibodies are present in equine colostrum, but their relationship with immune cells in foals after colostrum ingestion remains unclear. This study longitudinally analyzed immune cells in the peripheral blood of neonatal foals at short intervals and investigated their relationship with colostral immune cells. Eleven clinically healthy draft mares and their foals were examined. Foal blood was collected before colostrum intake (0 hr) and at 2-3, 6, 12, 36-48 hr, and 3 and 7 days after ingestion. Mare blood and milk (0, 36-48 hr; 0 hr milk defined as colostrum) were also collec...
Infection by Strongylus edentatus and Strongylus vulgaris in a warmblood crossbred foal in Ontario.
The Canadian veterinary journal = La revue veterinaire canadienne    June 1, 2026   Volume 67, Issue 6 663-669 
Trokoz A, Sjolin E, Lejeune M, Peregrine AS, Borkowski E.A 6-month-old warmblood-cross filly was presented to the Ontario Veterinary College Large Animal Hospital (Guelph, Ontario) because of acute profuse diarrhea unresponsive to treatment and severe wasting. The filly progressed to obtundation over 4 d and was euthanized. Postmortem examination revealed multifocal hemorrhage within the extraperitoneal fascia and diaphragm with intralesional, 4-centimeter-long, white nematodes. In addition, verminous arteritis of the cranial mesenteric artery, right colic artery thrombosis with segmental colonic infarction, ulcerative colitis, and segmental fibrino...
Vitrification of in vivo produced equine embryos: Size really does matter!
Journal of equine veterinary science    June 1, 2026   Volume 164 106032 doi: 10.1016/j.jevs.2026.106032
Wilsher S.Vitrification rather than slow-freezing has become the method of choice for the cryopreservation of in-vivo produced embryos. It is a simple technique that does not require a programmable freezing machine and relies chiefly on placing the embryo on a surface, rather than within a straw, in a small volume of vitrification solution to achieve extremely rapid cooling rates. However, in the field of equine embryo vitrification size truly does matter. Methodologies for both vitrification and warming prior to transfer are largely dictated by the size of the embryo. Since embryo size is directly rela...
Laser neoureterocystostomy to treat ectopic ureters.
Equine veterinary journal    May 31, 2026   doi: 10.1002/evj.70201
Smith C, Parente EJ.Ureteral ectopia is an uncommon but clinically important congenital abnormality in horses. If left untreated, it can lead to persistent dermatitis, urinary tract infections, and failure to thrive. Surgical correction is necessary, but traditional approaches have produced mixed results with high morbidity. Identification of a minimally invasive, effective technique would significantly improve prognosis. Objective: To describe the procedure and outcomes of cystoscopic guided laser neoureterocystostomy in three fillies. Methods: Case series. Methods: Retrospective review of three cases treated wi...
Development of a prognostic scoring system for systemic inflammatory response syndrome in donkeys.
Equine veterinary journal    May 31, 2026   doi: 10.1002/evj.70202
Barnabé MA, Bamford NJ, Elliott J, Chang YM, Rickards K, Menzies-Gow NJ.Systemic inflammatory response syndrome (SIRS) is associated with increased mortality in horses with gastrointestinal (GI) disease. However, there are no data relating to naturally occurring SIRS in donkeys. Objective: To determine SIRS frequency in donkeys with GI disease. To develop a donkey-specific prognostic SIRS score. Methods: Retrospective case series. Methods: Clinical records from donkeys presenting with GI disease in two independent cohorts (development cohort: n = 400, UK; validation cohort: n = 36, Australia) were reviewed. Age, sex, heart rate, respiratory rate, rectal te...
Embryo developmental kinetics and vitrification in relation to pregnancy outcome, foaling percentage and foal sex.
Equine veterinary journal    May 31, 2026   doi: 10.1002/evj.70197
Peere S, Dewulf M, Van den Branden E, Papas M, Broothaers K, De Coster T, Briote I, Hedia M, Angel-Velez D, Hoogewijs M, Govaere J, Smits K.While fast in vitro embryo development has been associated with improved outcomes, the relationships of slow in vitro embryo development and vitrified versus fresh in vitro produced (IVP) embryo transfer to foaling percentage and foal sex are less explored. Objective: To determine the relationships of (1) day of blastocyst formation (D7-11 after intracytoplasmic sperm injection (ICSI)) and (2) vitrification and warming method (one- and three-step) versus fresh transfer with pregnancy, early pregnancy loss (EPL), foaling percentage and foal sex. Methods: Retrospective clinical study. Methods: B...
Cheek tooth extraction in geriatric versus non-geriatric horses.
Equine veterinary journal    May 31, 2026   doi: 10.1002/evj.70199
Mair E, Nekouei O, Trummer-Schug P, Haralambus R, Biermann NM.Age-related dental changes are major contributors to dental disorders in older horses, and cheek tooth extractions are often required to maintain masticatory function and oral comfort. However, limited information is available on clinical and treatment characteristics in this older patient population. Objective: To describe clinical features, treatments, complication rates and short-term outcomes of horses undergoing oral cheek tooth extraction and treatment of odontogenic sinusitis, and to compare findings between geriatric and non-geriatric horses. Methods: Retrospective analysis of clinical...
Roux-en-Y gastrojejunostomy and jejunojejunostomy for pyloric obstruction bypass in a horse and a foal.
Equine veterinary journal    May 31, 2026   doi: 10.1002/evj.70203
Gandini M, Bolz N, Czech C, Hartman M, Giusto G.Gastric outflow obstruction in horses is a rare but challenging condition, often resulting from either congenital anomalies or acquired lesions such as chronic ulceration or pyloric polyps. Conventional surgical bypass procedures, including gastrojejunostomy (GJ) or gastroduodenostomy and less commonly duodenojejunostomy, can restore patency but may lead to postoperative complications. Objective: To describe the presentation, surgical management, and postoperative outcome of two horses-an adult and a foal treated with Roux-en-Y gastrojejunostomy combined with a side-to-side jejunojejunostomy (...
Oclacitinib for Controlling Pruritus and Associated Skin Lesions in 16 Horses With Allergic Dermatitis.
Veterinary dermatology    May 31, 2026   doi: 10.1111/vde.70091
Nuchprayoon N, Maneephan P, Tovanakasame N, Kampang C, Jandee P, Sangsuriya P, Tunhikorn M.Oclacitinib is a Janus kinase inhibitor approved for the treatment of pruritus associated with allergic dermatitis in dogs and may be effective in horses. Objective: To evaluate the efficacy of oclacitinib in reducing pruritus and skin lesions in horses with allergic dermatitis. Methods: Sixteen horses aged ≥ 18 months. Methods: Horses received oclacitinib at 0.25 mg/kg orally once daily for 21 days. Changes in haematological and biochemical parameters were measured on Day (D)0 and D21. The owners were instructed to evaluate the horses using the pruritus Visual Analog Scale (PVAS) on...
Prevalence of cardiac arrhythmias in poorly performing horses.
Open veterinary journal    May 31, 2026   Volume 16, Issue 5 2961-2969 doi: 10.5455/OVJ.2026.v16.i5.39
Aliraqi OM, Albadrani BA.Electrocardiogram abnormalities are common in racehorses and can affect performance. Unassigned: This study aimed to analyze the results of electrocardiographic problems and measure the frequencies of various cardiac arrhythmias. Unassigned: This cross-sectional study was conducted between September 2023 and August 2024. Standard electrocardiographic recordings were obtained from all horses, and cardiac troponin levels were measured. Out of the 114 poorly performing adult horses, 10 cases without arrhythmia were considered the control group. Seventy-four horses (64.9%) had at least one type of...
Renal Perfusion in Healthy Horses: A Feasibility Study With Contrast-Enhanced Ultrasound. This study assessed the feasibility of contrast-enhanced ultrasound (CEUS) for evaluating renal perfusion in horses and compared perfusion parameters between age groups. In a prospective study, eight healthy horses were divided into young (3-5 years, n = 4) and old (16-17 years, n = 4) groups. All animals underwent B-mode, Doppler ultrasonography, and CEUS of the right kidney after an intravenous bolus of SonoVue (0.02 mL/kg). Qualitative analysis assessed contrast kinetics, whereas quantitative parameters (peak intensity, time to peak [TP], area under the curve, and wash-out time) were o...