• 대한수의학회지
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• 제41권2호
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• pp.261-267
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• 2001

This research was conducted to investigate the effects of race conditions on racing injury in Thoroughbred(TB) horses. A total 335 horses were investigated the relationship between race conditions and racing injuries. The main environmental factors of racing injuries were spring season, rainy weather and sloppy racetrack. In the race types, high incidence of racing injury was found in special weigh, stakes, middle class and long length race. This results suggest that the racing injury can be effected to both individual body condition and various racetrack conditions.

• 한국임상수의학회지
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• 제23권2호
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• pp.158-163
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• 2006

This work describes an outbreak of strangles due to Streptococcus equi subsp. equi in 1 to 2 years old Thoroughbred horses. A total of 7 samples were collected from 5 horses in two different horse farms during 2003. Six ${\beta}$-hemolytic colonies selected from each sample were identified by biochemical tests using API STREPTO followed by PCR amplification which is able to recognize unique region of SeM gene of S. equi subsp. equi. All colonies selected from the ruptured lymphadenitis of 2 horses in farm A were identified as S. dysgalactiae subsp. equisimillis. It seems to be secondary infection because the sampling sites have been already opened and the horses have been treated with antibiotics for a week. All colonies from 2 submandibular lymphadenitis samples in Farm B were S. equi subsp. equi while the isolates from 3 nasal discharges in this farm were mixed with S. equi subsp. zooepidemicus.

• 대한수의학회지
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• 제42권4호
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• pp.469-473
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• 2002

This study was carried out to investigate the blood groups(Aa, Ca, Dc, Qa, Ua) and antierythrocyte antibody associated with neonatal isoerythrolysis(NI) in Thoroughbred horses. The blood groups from 1,351(35 stallions, 1,316 mares) Thoroughbred horses tested by serological procedures, and antierythrocyte antibody from 52 mares by indirect antiglobulin test. The blood groups(factor) of Aa, Ca, Dc, Qa and Ua positive were 97.1%, 100%, 91.4%, 82.9%, and 17.1% in stallions, respectively, and were negative 3.5%, 6.2%, 25.1%, 18.3%, and 77.1% in mares, respectively. These mares are considered to be at risk for production of an NI foals. The antierythrocyte antibody was not detected by this technique in all mares. These results suggest that the all breeding mares without blood groups Aa(3.5%) and Qa(18.3%) should be selected a appropriate stallion to prevent of neonatal isretythrolysis during the breeding season in Thoroughbred horses.

• 대한수의학회지
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• 제45권4호
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• pp.601-606
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• 2005

The disease causing colic is the greatest cause of death in the domestic horse population today and accidental deaths as a result of colic leads to decreased productivity and economic losses in the horse breeding industry. Large colon impaction is the most common cause of colic in horses. Horses may ingest sand either by eating from the ground in sandy locations, or because of its inclusion in hay. In certain areas sand impaction is relatively common. The horse (4 year, female) presented with abdominal pain, which was charactered by willing to lie down, pawing, and looking at flank. A month later, the horse died suddenly at sand paddock. Post-mortem examination revealed the sand impaction as a lot of feces, sand and gravels in the right dorsal colon. In addition, there was necrosis and debilitation in mucosal lining of the large colon and rupture site on the right dorsal colon. The purpose of this article is to review sand impaction and emergencies in Thoroughbred horses.

• 한국임상수의학회지
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• 제15권2호
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• pp.417-426
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• 1998

During the 5 years period(93-197) of Seoul racecourse Thoroughbred racing, 2i963 holies took an active part in Seoul Racecourse and 61,181 horses entered the racing.400 horses(305 : 1 time, 76 :2 times, 19 :3 times, total : 514 cases) had bled(EIPH) from their nostils after their races. Incidence of bleeding horses from the 21963 racehorses was 13.5%, and incidence of bleeding cases from the 61,181 horses was 0.84%. The average racing frequence (1.05 times/1 month) of bleeders was more than that(0.8 times/1 month) of total race-horses. There was tendency to higher incidence of bleeding at older in age, female in sex, England/ Ireland horses in origin, higher grade in performances heavier in body weight increased, larger in weight to be carried, mid or longer in racing distance, handicap race, spring in season. Relationship did not exist between bleeding and respiratory disease. These results suggested that frequent entering into the race should be controlled. And body weight regulation with conditioning is recommended far reducing incidence of EIPH. It is supposed to prevent bleeding that decrescent performance horses should not be entering long distance or handicap race.

• Animal Bioscience
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• 제35권5호
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• pp.659-669
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• 2022

Objective: Thoroughbred horses have been bred exclusively for racing in England for a long time. Additionally, because horse racing is a global sport, a healthy leisure activity for ordinary citizens, and a high-value business, systematic racehorse breeding at the population level is a requirement for continuous industrial development. Therefore, we established genomic evaluation system (using prize money as horse racing traits) to produce spirited, agile, and strong racing horse population Methods: We used phenotypic data from 25,061 Thoroughbred horses (all registered individuals in Korea) that competed in races between 1994 and 2019 at the Korea Racing Authority and constructed pedigree structures. We quantified the improvement in racehorse breeding output by year in Korea, and this aided in the establishment of a high-level horse-fill industry. Results: We found that pedigree-based best linear unbiased prediction method improved the racing performance of the Thoroughbred population with high accuracy, making it possible to construct an excellent Thoroughbred racehorse population in Korea. Conclusion: This study could be used to develop an efficient breeding program at the population level for Korean Thoroughbred racehorse populations as well as others.

• Animal Bioscience
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• 제35권4호
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• pp.527-532
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• 2022

Objective: In this study, we aimed to investigate the recent changes such as allele frequencies and total probability of exclusion (PE) in Thoroughbred horses in Korea using short tandem repeat (STR) parentage panels between 2006 and 2016. Methods: The genotype was provided for 5,988 horse samples with 15 microsatellite markers (AHT4, AHT5, ASB2, ASB17, ASB23, CA425, HMS1, HMS2, HMS3, HMS6, HMS7, HTG4, HTG10, LEX3 and VHL20). Results: In our study, the observed number of alleles per locus ranged from 3 (HMS1) to 9 (ASB17) in 2006 and 4 (HMS1) to 9 (ASB2) in 2016, with a mean value of 6.28 and 6.40, respectively. Of the 15 markers, HMS2, HTG4, and CA425 loci had relatively low polymorphism information content (<0.5000) in the Thoroughbred population. Mean levels of genetic variation in 2006 and 2016 were observed heterozygosity (H_O) = 0.708, and expected heterozygosity (H_E) = 0.685, as well as and H_O = 0.699 and H_E = 0.682, respectively. The PE was calculated for each group based on the allele frequencies of 14 or 15 STRs. The 2006 survey analyzed that PE was 0.9998, but it increased to 0.9999 in 2016 after the HMS2 marker was added in 2011. The current STR panel is still a powerful tool for parentage verification that contributes to the maintenance of integrity in the Thoroughbred population. Conclusion: The current STR panel is still a powerful tool for parentage verification that contributes to the maintenance of integrity in the Thoroughbred horses. However, continuous monitoring genetic variability is necessary.

• Journal of Animal Science and Technology
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• 제64권4호
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• pp.800-811
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• 2022

The integration of metabolomics and transcriptomics may elucidate the correlation between the genotypic and phenotypic patterns in organisms. In equine physiology, various metabolite levels vary during exercise, which may be correlated with a modified gene expression pattern of related genes. Integrated metabolomic and transcriptomic studies in horses have not been conducted to date. The objective of this study was to detect the effect of moderate exercise on the metabolomic and transcriptomic levels in horses. In this study, using nuclear magnetic resonance (NMR) spectroscopy, we analyzed the concentrations of metabolites in muscle and plasma; we also determined the gene expression patterns of branched chain (alpha) keto acid dehydrogenase kinase complex (BCKDK), which encodes the key regulatory enzymes in branched-chain amino acid (BCAA) catabolism, in two breeds of horses, Thoroughbred and Jeju, at different time intervals. The concentrations of metabolites in muscle and plasma were measured by ¹H NMR (nuclear magnetic resonance) spectroscopy, and the relative metabolite levels before and after exercise in the two samples were compared. Subsequently, multivariate data analysis based on the metabolic profiles was performed using orthogonal partial least square discriminant analysis (OPLS-DA), and variable important plots and t-test were used for basic statistical analysis. The stress-induced expression patterns of BCKDK genes in horse muscle-derived cells were examined using quantitative reverse transcription polymerase chain reaction (qPCR) to gain insight into the role of transcript in response to exercise stress. In this study, we found higher concentrations of aspartate, leucine, isoleucine, and lysine in the skeletal muscle of Jeju horses than in Thoroughbred horses. In plasma, compared with Jeju horses, Thoroughbred horses had higher levels of alanine and methionine before exercise; whereas post-exercise, lysine levels were increased. Gene expression analysis revealed a decreased expression level of BCKDK in the post-exercise period in Thoroughbred horses.

• 현장농수산연구지
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• 제18권1호
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• pp.25-28
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• 2016

말의 복지는 생리적 및 심리적 필요의 만족에 좌우된다. 본 연구의 목적은 말목장에서 펜스의 안전을 평가하기 위함이다. 행동장애(Cribbing)를 가진 Thoroughbred 수망아지 한 마리가 패독에서 폐사한 채 발견되었다. 패독의 펜스는 4개의 파이프로 만들어졌고, 망아지는 위에서 2번째 파이프를 무는 행동장애를 하였다. 그러나 그 망아지는 얼굴을 빼지 못하였는데 그 이유는 아래턱이 1번째 파이프에 걸렸고 앞니가 2번째 파이프에 끼었기 때문이다. 그래서 망아지는 얼굴을 빼기 위해서 사투하는 동안에 당황하였고, 쓰러졌으며 결국 교사하였다. 안전펜스는 말목장에 필수적이고 그 기능은 말을 보호하는 것이지만 위해를 가하였다. 말의 안전한 관리를 위하여 말 얼굴길이와 파이프의 간격을 고려하여야한다. 말이 패독에 있을 때 입마개를 씌울 필요가 있는지 더 연구가 필요하다. 본 연구는 말산업에서 펜스타입과 안전성평가에 중요한 벤치마크를 제공하였다.

• 한국임상수의학회지
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• 제31권4호
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• pp.357-359
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• 2014

말전염성빈혈(EIA)은 전세계의 마과동물에서 발생하는 전염병이다. 2005년부터 2011년까지 제주에서 사육되는 말을 대상으로 EIA를 조사하였다. 한국마사회 제주경마공원 동물병원에서 제주마 1,329 마리 및 한라마(제주산마) 8,324 마리 그리고 제주목장의 동물병원에서 Thoroughbred 말 387 마리 등 7년간 총 10,040마리를 효소면역측정법을 이용하여 검사하였다. 조사기간 동안 혈액에서 EIA 항체는 검출되지 않았다. 1985년 이후부터 제주에서 EIA 항체가 검출된 적이 없고, 발병 예도 없었다. 그러므로 제주에는 EIA가 없는 것으로 생각된다.