• Journal of Veterinary Clinics
• /
• v.29 no.4
• /
• pp.348-351
• /
• 2012

A vaginal speculum examination of a 17-month-old Holstein heifer with a history of repeated artificial insemination (AI) failures via the cranial vagina revealed the presence of an intact hymen (imperforate hymen) beyond the external urethral orifice, which resembled the vaginal wall. An ultrasonographic examination detected hypoechoic fluid within the vaginal cavity between the intact hymen and the cervix, indicating the presence of hydrocolpos. After sedation and epidural anesthesia, the intact hymen was incised using a scalpel and scissors and removed, while the incised portions were sutured using a simple interrupted method. The heifer became pregnant after three consecutive estruses with the intervals of approximately 20 days and concomitant AIs. The heifer gave birth to a healthy male calf with no complications after a 291-day gestation period. This case reports the presence of an imperforate hymen with hydrocolpos in a Holstein heifer, followed by successful insemination, conception and delivery after removal of the imperforate hymen.

• Journal of Veterinary Clinics
• /
• v.25 no.2
• /
• pp.136-138
• /
• 2008

On a dairy farm, a Holstein cow had consistently shown an intersucking behavior within the milking herd. It has been considered as one of several behavioral disorders primarily coming from feeding management failure during weaning period. Due to their behavior, injured teats of other milking cows could decrease milk production. Through tongue surgery, by producing a convex shape of the dorsum of the tongue after suturing the excised ventral region, the intersucking behavior was forcefully corrected and disappeared thereafter within the dairy herd without any complications.

• Journal of Life Science
• /
• v.19 no.9
• /
• pp.1258-1264
• /
• 2009

In this study, effects of feeding Holstein cows with TMR feed, which includes un-dried citrus byproducts, on the nutritional components of their raw milk were investigated. Two kinds of raw milk from primipara cows and multipara cows were used for the experiment: T0 (raw milk produced by dairy cows not fed with TMR feed including citrus byproducts) and T1 (raw milk produced by dairy cows fed with TMR feed including citrus byproducts). For both primipara and multipara cows, there was no statistically meaningful difference between T0 and T1 in terms of moisture, crude protein, crude fat, crude ash contents or caloric content. T1 showed a lower amount of cholesterol in raw milk for both primipara and multipara cows, which was especially statistically meaningful in multipara cows (p<0.05). Regarding mineral contents in raw milk, T1 showed significantly higher amounts of Na and S in primipara cows, and Na, Cu, Fe, S in multipara cows, respectively. For both primipara and multipara cows, there were no statistically meaningful differences between T0 and T1 in terms of the total amount of amino acids in the raw milk, the composition of saturated fatty acid/unsaturated fatty acid, vitamin A, E, $B_2$ or $\beta$-carotene, while T1 showed significantly higher levels of vitamin $B_1$ in primipara cows than T0.

• Journal of Veterinary Clinics
• /
• v.29 no.5
• /
• pp.427-430
• /
• 2012

An infertile, three-year-old primiparous cow was diagnosed preliminarily with pyometra by rectal palpation at 180 days postpartum. Ultrasonography showed that the cranial portion of the right uterine horn was distended with fluid, while the base portion of the horn was missing. A dense band of tissue connected the cranial portion of the uterine horn to the uterine body. However, the left uterine horn was normal. Gross postmortem analysis of the reproductive organs confirmed the ultrasonographic observations. Histopathological observations also showed that dark red-brown mucus filled the thin-walled right uterine horn, where neither caruncles nor uterine glands were observed. Finally, this primiparous Holstein cow was diagnosed with segmental aplasia of the right uterine horn.

• Proceedings of the KSAR Conference
• /
• 2003.06a
• /
• pp.91-91
• /
• 2003

소의 생산성 향상을 위해서는 번식효율의 증진과 개체의 유전능력을 충분히 발휘할 수 있도록 적절한 사양관리를 실시하여야 한다. 특히 번식관리는 발정관찰로부터 출발하며 발정관찰의 원활한 수행이 없이는 좋은 번식성적을 기대할 수 없다. 그러나 발정관찰은 많은 시간과 노동력이 요구되며 이로 인하여 발정관찰방법과 보조기구가 개발되어 시판되고 있다. 본 연구는 발정관찰의 편리성과 정확성을 개선하고자 (주)한경게놈텍에서 개발한 무인발정관리시스템(HMS)을 활용하여 발정발현양상을 분석하였다. 실험에 공시된 시험축은 안성인근 지역에서 사육되는 35두의 홀스타인 경산우를 선발하였으며, 발정주기에 관계없이 무작위로 선발하여 미근부에 감지센서를 부착하고 감지시간을 0.1초 이상으로 설정하여 매직닥터를 설치하였다. 발정감지횟수와 감지시간의 분석은 승가허용 감지시간이 0.5초 이상인 것만을 승가허용으로 간주하고 분석하였다.

• Journal of the korean veterinary medical association
• /
• v.47 no.5
• /
• pp.456-461
• /
• 2011

최근 홀스타인 경산우는 체격이 대형화함과 동시에 유전적 개량에 의해 비유량이 증가하고 있으나, 비유량이 증가하는 한편, 번식성적의 저하가 전 세계적인 문제로 되고 있다. 미국의 경우, 젖소의 첫 인공수정 수태율은 1951년의 약 65%에서 1996년 약 40%까지 저하하였다는 보고도 있다(Butler 등). 또한 영국에서도 과거 25년간에 수태율이 약 50%에서 35%까지 저하하여 40%를 밑돌고 있으며(Cook 등), 일본의 경우도 마찬가지로 북해도 젖소의 첫 수정 수태율은 40%를 밑돌고 있다는 것으로 미루어 우리나라의 경우도 이와 유사한 성적이나 좋지 않을 것으로 사료된다. 더구나 수태율의 저하와 아울러 분만간격(평균공태일수)는 매년 연장되고, 현재 고능력 젖소에서 번식 성적의 향상은 해결과제로, 세계각국에서는 번식성적저하의 요인 및 대책에 대한 많은 연구가 이뤄지고 있다. 따라서 고능력 젖소에서 유량, 부(負, -)에너지 균형 및 BCS 등이 번식성적에 미치는 영향 등에 대해 국내 외의 수집 논문, 자료 등을 정리하여 대동물임상수의사들에게 도움을 주고자 소개하고 저 한다.

• Journal of agriculture & life science
• /
• v.50 no.5
• /
• pp.173-182
• /
• 2016

This study was aimed to identify the phenotypic relationships between calving interval and lactation curve parameters in Korean Holstein cow. The data of 36,505 lactation records was obtained from the Dairy Herd Improvement program run by Dairy Cattle Improvemnet Center of National Agricultural Federation of Korea. All lactation records were collectied from the multiparous cows calving between 2011 to 2013. The estimated lactation curves were drawn using Wood model based on actual milk yield records, and NLIN Procedure of SAS program (ver. 9.2). General linear multivariate models for calving interval, 305-d milk yield, lactation parameters(A, b, c), persistency, peak day, and peak yield included fixed effects of calving year-season (spring, summer, fall and winter) and parity(2, 3 and 4). For calving interval, 305-d milk yield, lactation parameters(A, b, c), persistency, peak day and peak yield, all two fixed effect(calving year-season, parity) were significant(p<0.05). The estimated lactation functions using Wood model for 2, 3, and 4 parity were yt=24.66t0.175e-0.00302t, yt=24.69t0.192e-0.00334t, and yt=24.22t0.200e-0.00341t, respectively. Phenotypic correlation (partial residual correlation) between calving interval and 305-d milk yield, A, b, c, persistency, peak day, and peak yield were 0.093, -0.014, 0.028, -0.046, 0.099, 0.085, and 0.052, respectively. To conclude, if calving interval increase then ascent to peak, persistency, peak day and peak yield are increase, and descent after peak is decrease. So, total 305-d milk yield is increase.