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Equine Breeding

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https://www.readbyqxmd.com/read/28627060/clinical-nutrition-counselling-service-in-the-veterinary-hospital-retrospective-analysis-of-equine-patients-and-nutritional-considerations
#1
D Vergnano, D Bergero, E Valle
Nutrition plays a very important role in the healthy and in the ill horse. Although research in this field clearly shows that incorrect nutritional practices may lead to severe pathologies, inappropriate feeding plans often continue to be used. A clinical nutrition counselling (CNC) service could thus be of great use to both horse owners and veterinarians. The aim of this study was to provide information on equine patients referred to the CNC service of the University of Turin and to provide standard dietary protocols as used in our Veterinary Teaching Hospital for the most common nutrition-related pathologies...
June 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28608565/prevalence-of-headshaking-within-the-equine-population-in-the-united-kingdom
#2
S E Ross, V L H Roberts, J K Murray
BACKGROUND: Headshaking in horses has been reported to be most commonly due to idiopathic neuropathic facial pain (trigeminal-mediated headshaking). The prevalence of headshaking in horses in the UK is unknown. OBJECTIVES: To estimate owner-reported prevalence of headshaking in horses in the UK and to report their signalment and disease characteristics, as reported by owners. STUDY DESIGN: Cross-sectional web based owner questionnaire. METHODS: The questionnaire was advertised online via social media, horse forums, veterinary websites and equestrian magazines from 17 June 2016, until greater than 1,000 responses had been obtained...
June 13, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28601147/deep-anestrous-mares-under-natural-photoperiod-treated-with-recombinant-equine-fsh-refsh-and-lh-relh-have-fertile-ovulations-and-become-pregnant
#3
Geraldine A Meyers-Brown, Meaghan C Loud, John C Hyland, Janet F Roser
The most common equine breeding practice to decrease the time to the first ovulation of the year is to use artificial lights starting December 1 in the Northern Hemisphere. It can take 60-90 d for this lighting regimen to induce a fertile ovulation. The success rate for pharmaceutical compounds to carry out the same process has been variable. One compound that did induce an early ovulation was recombinant equine follicle stimulating hormone (reFSH), but neither pregnancy nor cyclicity was established in that study...
August 2017: Theriogenology
https://www.readbyqxmd.com/read/28591825/corticotrophin-releasing-hormone-and-corticosterone-impair-development-of-preimplantation-embryos-by-inducing-oviductal-cell-apoptosis-via-activating-the-fas-system-an-in-vitro-study
#4
Xiu-Wen Tan, Chang-Li Ji, Liang-Liang Zheng, Jie Zhang, Hong-Jie Yuan, Shuai Gong, Jiang Zhu, Jing-He Tan
STUDY QUESTION: What are the mechanisms by which corticotrophin-releasing hormone (CRH) and corticosterone impair the development of preimplantation embryos in the oviduct. SUMMARY ANSWER: CRH and corticosterone do not affect preimplantation embryos directly, but impair their development indirectly by triggering apoptosis of oviductal epithelial cells (OECs) through activation of the Fas system. WHAT IS KNOWN ALREADY: Studies report that stress impairs embryo development with facilitated secretion of CRH and glucocorticoids...
June 7, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28568646/genetic-diversity-of-syrian-arabian-horses
#5
S Almarzook, M Reissmann, D Arends, G A Brockmann
Although Arabian horses have been bred in strains for centuries and pedigrees have been recorded in studbooks, to date, little is known about the genetic diversity within and between these strains. In this study, we tested if the three main strains of Syrian Arabian horses descend from three founders as suggested by the studbook. We examined 48 horses representing Saglawi (n = 18), Kahlawi (n = 16) and Hamdani (n = 14) strains using the Equine SNP70K BeadChip. For comparison, an additional 24 Arabian horses from the USA and three Przewalski's horses as an out group were added...
May 31, 2017: Animal Genetics
https://www.readbyqxmd.com/read/28557367/septic-keratitis-in-dogs-cats-and-horses-in-switzerland-associated-bacteria-and-antibiotic-susceptibility
#6
Anja Suter, Katrin Voelter, Sonja Hartnack, Bernhard Martin Spiess, Simon Anton Pot
OBJECTIVE: To evaluate the most common bacterial pathogens associated with septic keratitis in veterinary patients from Switzerland. The second objective was to analyze antibiotic susceptibility test results of the identified bacterial pathogens. The third objective was to evaluate potential breed predispositions to septic keratitis. PROCEDURES: Two hundred and fifty-five cultures and antibiotic susceptibility reports from dogs, cats, and horses with septic keratitis that were presented to the University of Zurich Veterinary Medical Teaching Hospital between 2009 and 2013 were reviewed...
May 29, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28543943/assessment-of-horse-owners-ability-to-recognise-equine-laminitis-a-cross-sectional-study-of-93-veterinary-diagnosed-cases-in-great-britain
#7
D Pollard, C E Wylie, K L P Verheyen, J R Newton
BACKGROUND: Use of owner-reported data could further epidemiological knowledge of equine laminitis. However, owner recognition of laminitis has not previously been assessed. OBJECTIVES: The primary objective was to establish whether cases of owner-suspected laminitis would be confirmed as laminitis by the attending veterinary surgeon. Secondary objectives were to compare owner- and veterinary-reported information from veterinary-confirmed cases of equine laminitis...
May 22, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28543410/the-diagnosis-of-equine-insulin-dysregulation
#8
REVIEW
F R Bertin, M A de Laat
Insulin dysregulation is the hallmark of Equine Metabolic Syndrome and has received attention because of its direct association with laminitis. In the absence of an adequate treatment for laminitis, a focus on prophylaxis is needed, making early detection of individuals at risk of developing laminitis one of the main challenges in equine endocrinology. Recent studies have shown that insulin dysregulation goes beyond tissue insulin resistance and it is now demonstrated that the equine enteroinsular axis plays a major role in insulin secretion and equine hyperinsulinaemia...
May 22, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28497743/seroprevalence-of-theileria-equi-and-babesia-caballi-in-horses-in-spain
#9
Maria Guadalupe Montes Cortés, José Luis Fernández-García, Miguel Ángel Habela Martínez-Estéllez
Equine piroplasmoses are enzootic parasitic diseases distributed worldwide with high incidence in tropical and subtropical regions. In Spain, there is insufficient epidemiological data about equine piroplasmoses. The main aim of the present study was therefore to estimate the prevalence of Theileria equi and Babesia caballi in five regions and obtain information about the risk factors. This study was conducted in the central and south-western regions of Spain, using indirect fluorescence antibody testing (IFAT) in 3,100 sera samples from apparently healthy horses of different ages, breeds, coat colours, genders and geographical locations...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28460750/cross-sectional-study-of-the-prevalence-of-and-risk-factors-for-hoof-disorders-in-horses-in-the-netherlands
#10
M Holzhauer, R Bremer, I Santman-Berends, O Smink, I Janssens, W Back
Information is scarce on the prevalence of hoof disorders in horses. In this study, we examined the prevalence of and risk factors for hoof disorders in a population of horses in The Netherlands. In a group of 942 randomly selected horses, hoof health was scored during regular foot trimming (one horse/farm). Hooves were assessed for the occurrence of one of 12 hoof disorders by a group of 21 certified farriers in two periods i.e. winter and summer of 2015. The mean age of the group of horses was 11.2±5.6years...
May 1, 2017: Preventive Veterinary Medicine
https://www.readbyqxmd.com/read/28444202/application-of-genomic-estimation-methods-of-inbreeding-and-population-structure-in-an-arabian-horse-herd
#11
Mohammed A Al Abri, Uta König von Borstel, Veronique Strecker, Samantha A Brooks
Horse breeders rely heavily on pedigrees for identification of ancestry in breeding stock. Inaccurate pedigrees may erroneously assign individuals to false lineages or breed memberships resulting in wrong estimates of inbreeding and coancestry. Moreover, discrepancies in pedigree records can lead breeders seeking to limit inbreeding into making misguided breeding decisions. Genome-wide SNPs provide a quantitative tool to aid in the resolution of lineage assignments and the calculation of genomic measures of relatedness...
June 1, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28439897/platelet-lysate-obtained-via-plateletpheresis-performed-in-standing-and-awake-equine-donors
#12
Scarlett M Sumner, Maria C Naskou, Merrilee Thoresen, Ian Copland, John F Peroni
BACKGROUND: Platelet preparations containing growth factors, attachment factors, and enzymes are appealing to enhance healing of injured tissues and as an alternative to xenogenic serum in cell culture media. Plateletpheresis is commonly used to collect platelets in human medicine but has not been validated in horses. STUDY DESIGN AND METHODS: Plateletpheresis to collect platelet concentrate was performed on six female, mixed breed, chemically restrained horses using commercially available apheresis equipment...
April 25, 2017: Transfusion
https://www.readbyqxmd.com/read/28437035/the-association-between-oral-examination-findings-and-computed-tomographic-appearance-of-the-equine-temporomandibular-joint
#13
J L Carmalt, H Simhofer, A Bienert-Zeit, J E Rawlinson, C L Waldner
BACKGROUND: The temporomandibular joint (TMJ) forms the junction between the maxilla and mandible. Movement of the jaw and resulting masticatory forces have been extensively studied in the horse; however, less is known about the inter-relationship between this joint and oral and dental pathology. OBJECTIVES: To determine the association between specific oral and dental pathologies and anatomical variations of the TMJ imaged with computed tomography (CT) in horses with asymptomatic TMJs...
April 24, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28425625/a-missense-mutation-in-damage-specific-dna-binding-protein-2-is-a-genetic-risk-factor-for-limbal-squamous-cell-carcinoma-in-horses
#14
Rebecca R Bellone, Jiayin Liu, Jessica L Petersen, Maura Mack, Moriel Singer-Berk, Cord Drögemüller, Julia Malvick, Barbara Wallner, Gottfried Brem, M Cecilia Penedo, Mary Lassaline
Squamous cell carcinoma (SCC) is the most common cancer of the equine eye, frequently originating at the limbus, with the potential to invade the cornea, cause visual impairment, and result in loss of the eye. Several breeds of horses have a high occurrence of limbal SCC implicating a genetic basis for limbal SCC predisposition. Pedigree analysis in the Haflinger breed supports a simple recessive mode of inheritance and a genome-wide association study (N = 23) identified a 1.5 Mb locus on ECA12 significantly associated with limbal SCC (Pcorrected = 0...
July 15, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28423874/the-relationship-between-the-variants-in-the-5-utr-of-ecg-genes-and-serum-ecg-levels
#15
ShuQin Liu, Song Lian, YunZhou Yang, ChunZheng Fu, HongYing Ma, ZhiYao Xiong, Yao Ling, ChunJiang Zhao
Equine Chorionic Gonadotropin (eCG) is a gonadotrophic hormone secreted by endometrial cups of pregnant mare, which is used to induce follicular development. In the present study, single nucleotide polymorphisms (SNPs) in 5'-untranslated regions (5'-UTR) of eCG genes were screened across 10 horse breeds, including 7 Chinese indigenous breeds and 3 imported breeds. Four SNPs were identified in the 5'-UTR of the eCGα gene, and one of them was unique in the indigenous breeds. There were 2 SNPs detected at the 5' end of the eCGβ subunit gene, and one of them was only found in the Chinese breeds...
April 19, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28382856/postmortem-findings-in-ontario-racehorses-2003-2015
#16
Josepha DeLay
Postmortem lesions and cause of death were evaluated retrospectively for 963 horses examined as part of the Ontario Racing Commission Death Registry over a 13-y period. The Death Registry was established in 2003 to identify factors leading to death or euthanasia of racehorses in this Canadian province. Postmortem examination was carried out on 56% of horses reported to the Death Registry and included Standardbred, Thoroughbred, and American Quarter Horses. Musculoskeletal injury was the most common reason for death associated with racing or training among all racehorses and involved 68% of horses...
April 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28315936/peptide-binding-motifs-of-two-common-equine-class-i-mhc-molecules-in-thoroughbred-horses
#17
Tobias Bergmann, Mikaela Lindvall, Erin Moore, Eugene Moore, John Sidney, Donald Miller, Rebecca L Tallmadge, Paisley T Myers, Stacy A Malaker, Jeffrey Shabanowitz, Nikolaus Osterrieder, Bjoern Peters, Donald F Hunt, Douglas F Antczak, Alessandro Sette
Quantitative peptide-binding motifs of MHC class I alleles provide a valuable tool to efficiently identify putative T cell epitopes. Detailed information on equine MHC class I alleles is still very limited, and to date, only a single equine MHC class I allele, Eqca-1*00101 (ELA-A3 haplotype), has been characterized. The present study extends the number of characterized ELA class I specificities in two additional haplotypes found commonly in the Thoroughbred breed. Accordingly, we here report quantitative binding motifs for the ELA-A2 allele Eqca-16*00101 and the ELA-A9 allele Eqca-1*00201...
March 18, 2017: Immunogenetics
https://www.readbyqxmd.com/read/28287934/seasonal-patterns-in-eastern-equine-encephalitis-virus-antibody-in-songbirds-in-southern-maine
#18
Susan P Elias, Patrick Keenan, Joan L Kenney, Sara R Morris, Kristen M Covino, Sara Robinson, Kimberly A Foss, Peter W Rand, Charles Lubelczyk, Eleanor H Lacombe, John-Paul Mutebi, David Evers, Robert P Smith
The intent of this study was to assess passerine eastern equine encephalitis virus (EEEv) seroprevalence during the breeding season in southern Maine by testing songbird species identified in the literature as amplifying hosts of this virus. In 2013 and 2014, we collected serum samples from songbirds at a mainland site and an offshore island migratory stopover site, and screened samples for EEEv antibodies using plaque reduction neutralization tests. We compared seasonal changes in EEEv antibody seroprevalence in young (hatched in year of capture) and adult birds at the mainland site, and also compared early season seroprevalence in mainland versus offshore adult birds...
May 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28235824/a-nonsense-variant-in-the-st14-gene-in-akhal-teke-horses-with-naked-foal-syndrome
#19
Anina Bauer, Theresa Hiemesch, Vidhya Jagannathan, Markus Neuditschko, Iris Bachmann, Stefan Rieder, Sofia Mikko, M Cecilia Penedo, Nadja Tarasova, Martina Vitková, Nicolò Sirtori, Paola Roccabianca, Tosso Leeb, Monika M Welle
Naked foal syndrome (NFS) is a genodermatosis in the Akhal-Teke horse breed. We provide the first scientific description of this phenotype. Affected horses have almost no hair and show a mild ichthyosis. So far, all known NFS affected horses died between a few weeks and 3 yr of age. It is not clear whether a specific pathology caused the premature deaths. NFS is inherited as a monogenic autosomal recessive trait. We mapped the disease causing genetic variant to two segments on chromosomes 7 and 27 in the equine genome...
April 3, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28224649/sex-chromosomal-abnormalities-associated-with-equine-infertility-validation-of-a-simple-molecular-screening-tool-in-the-purebred-spanish-horse
#20
G Anaya, A Molina, M Valera, M Moreno-Millán, P Azor, P Peral-García, S Demyda-Peyrás
Chromosomal abnormalities in the sex chromosome pair (ECAX and ECAY) are widely associated with reproductive problems in horses. However, a large proportion of these abnormalities remains undiagnosed due to the lack of an affordable diagnostic tool that allows for avoiding karyotyping tests. Hereby, we developed an STR (single-tandem-repeat)-based molecular method to determine the presence of the main sex chromosomal abnormalities in horses in a fast, cheap and reliable way. The frequency of five ECAX-linked (LEX026, LEX003, TKY38, TKY270 and UCDEQ502) and two ECAY-linked (EcaYH12 and SRY) markers was characterized in 261 Purebred Spanish Horses to determine the efficiency of the methodology developed to be used as a chromosomal diagnostic tool...
February 22, 2017: Animal Genetics
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