• 대한수의학회지
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• 제28권2호
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• pp.387-390
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• 1988

A preliminary survey of Sarcocystis species in the slaughtered cattle in Seoul was undertaken during October through December 1987, using digestion diagnostic technique for the heart muscle specimens digested in 0.5% trypsin solution. Results indicated that 41.5% of 159 bovine hearts were infected with Sarcocystis proliferative forms. High frequencies in the exotic dairy cattle(42.2%) and the Korean native cattle(41.7%) were noticed in comparison with low frequency in the cross breed(25.0%). No differences were indicated between the sexes of the host animals, although an age difference was noticed as 48.9% in cattle older than four years in comparison with 39.0% and 37.1% in younger than two years and in two to four years, respectively.

• 대한수의학회지
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• 제28권2호
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• pp.339-343
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• 1988

Serological study and isolation of Brucellae from dairy cattle were carried out in Kyungpook area of Korea during the period from 1984 to 1985. Biotyping of the isolates was done. Of the 11168 cattle in 2479 herds examined, 27 cattle (0.24%) in the 17 herds (0.69%) were serologically positive for brucellosis. Brucella abortus was recovered from 20 (74.1%) of the 27 infected cattle, and all the strains of the isolates belonged to biotype 1. Of the tissues cultured for brucellae, the supramammary lymph nodes had the highest rate (55.6%) of recovery of brucella organisms.

• Asian-Australasian Journal of Animal Sciences
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• 제3권3호
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• pp.205-218
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• 1990

A general model was developed to simulate cattle growth and beef production. The present model was constructed, based on ARC metabolizable energy system in principle, and incorporated up-to-date knowledge and information into previous models, which were reported by Sanders and Cartwright (1979a,b) and Kahn (1982). The model may apply to cover a wide range of genetic and environmental conditions, because many factors relating to cattle growth and beef production are taken into consideration. The model may provide better understanding of various components and processes of beef cattle production systems.

• Asian-Australasian Journal of Animal Sciences
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• 제12권6호
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• pp.843-845
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• 1999

To evaluate direct and maternal effects on calf market weight (CMW) and carcass weight (CW) in Japanese Black cattle under an animal model, genetic parameters were estimated using 51,320 records of CMW and 11,944 records of CW, respectively. Direct and maternal heritabilities, and direct-maternal genetic correlation were estimated to be 0.22, 0.06 and 0.27 for CMW, and 0.23, 0.12 and -0.40 for CW, respectively. Correlation coefficient between maternal breeding values for CMW and CW was 0.521 for 157 sires appeared in both CMW and CW data sets. These results suggest that the maternal genetic effect on pre-weaning growth carries over to carcass weight. Maternal breeding values for both calf market weight and carcass weight could be used as the indicator traits of maternal ability in Japanese Black cattle.

• 대한수의학회지
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• 제36권3호
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• pp.743-745
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• 1996

가축 특히 대동물에 있어서 전방수의 화학조성에 관한 보고는 극히 드물다. 따라서 본 연구에서는 한우 및 유우(Holstein)를 대상으로 전방수에 대해 화학조성을 검토하였다. 유의의 protein, urea nitrogen, creatinine, cholesterol, calcium, sodium, potassium과 chloride 등이 분석 검출되었다. 이러한 조성분포는 혈장에서 보다는 수액(cerebrospinal fluid)의 조성에 더 유사한 것으로 나타났으며, 한우 및 유우에 있어서 조성에 관한 차이는 거의 인정되지 않았다.

• 대한수의학회지
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• 제50권1호
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• pp.55-57
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• 2010

Torque teno virus (TTV), a species of Anellovirus, is a non-enveloped single stranded DNA virus with a wide range of animal hosts. The incidence of TTV is quite ubiquitous throughout the world. A total of 235 serum samples obtained from 137 pigs and 98 cattle at slaughterhouses in Korea during April 2005 to May 2005 were tested by TTV-specific PCR as to monitor prevalence of TTV among swine and cattle. As a result, the prevalent rates of TTVs in pigs and cattle were 43.1% and 4.1%, respectively. It seems that TTV infection is quite prevalent in swine population.

• 한국동물위생학회지
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• 제24권2호
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• pp.139-146
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• 2001

To examine the prevalence and types of kidney lesions in Korean cattle, a survey was carried out at a abattoir in september 2000 and January 2001. The collected kidneys were examined grossly and histopathologically and investigated for the patterns of renal diseases with considering season and sex. Of 735 cattle (99 bulls and 246 cows in September and 140 bulls, 3 steers, and 247 cows in January) surveyed, 301 (41%) cattle had various renal lesions. The most common prominent finding was focal or multiple interstitial nephritis (36.2%). Other lesions included focal or multiple renal cyst (9.1%), infarction (0.1%), hemorrhage (0.3%), and renal atrophy (0.3%). Microscopically, main pathological lesions were acute or chronic interstitial nephritis with moderate infiltration of neutrophil or lymphocyte, respectively. Finally, the kidney lesions are more or less correlated with the meat quality, especially in female Korean cattle.

• Journal of the Korean Data and Information Science Society
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• 제19권4호
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• pp.1123-1131
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• 2008

A considerable amount of research has focused on the dimensionality of service failure and recovery construct. This paper is focused on service failure and recovery in the Korean native cattle and imported beef restaurant industry in the Korea. So, this paper has adapted Kau and Loh's Service recovery measurement scale so that restaurant managers can use it to determine how customers perceive the service quality in Korean native cattle beef restaurant and imported beef restaurant. The purpose of this research is to test the difference in pre-purchase expectation and post-purchase actual performance of 4 dimensions between the restaurants that sell the beef of Korean native cattle and imported cattle. The paired t -test is used to test difference of pre-purchase expectation and post-purchase actual performance for service recovery measurement scale's 4 dimensions of the 2 restaurant types. But, there is significant difference between pre-purchase expectation and post-purchase actual performance in the 2 restaurant types.

• 대한수의학회지
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• 제9권2호
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• pp.37-42
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• 1969

A survey on the Eperythrozoon infection of cattle was conducted by means of examinations of Giemsa staining blood films obtained from 2,263 cattle which had been fed in the middle and south parts of Korea. On the other hand, continuous hematological examinations to five splenectomized calves were performed. The results obtained were summarized as follows: 1. Eperythrozoon wenyoni were detected in the blood films of five cattle from Kyungpook and Cheju areas. 2. The infections of Eperythrozoon wenyoni were observed in four of five splenectomized calves from Taegu and Sungwhan areas. 3. From these results it is considered that the infections of Eperythrozoon wenyoni in cattle are quite common in the middle and south parts of Korea.

• Parasites, Hosts and Diseases
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• 제51권1호
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• pp.129-132
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• 2013

In this study a disperse dye immunoassay method was standardized and evaluated for detection of antibodies against Neospora caninum in cattle. Sera from 150 cattle with a recent history of abortion were collected and tested by commercial ELISA kit and a standardized in-house dye immunoassay system. The positivity rate for the sera used in this study was 34.6% for the disperse dye immunoassay (DDIA) compared to 32% obtained by ELISA kit. This study showed no significant difference between DDIA and ELISA. The results indicated that the DDIA provide an economic, simple, rapid and robust test for detection of N. caninum infection in cattle.