• 한국동물위생학회지
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• 제14권2호
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• pp.127-133
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• 1991

The present study was conducted to investigate the biochemical properties, pathogenicity, antimicrobial test, and serotype of E-coli isolated from slaughtered cattle during the period from March 1991 to May 1991. 1. A total of 12 E-coli isolates were isolated from 132 bile juice of slaughtered cattle. 2. All isolates were resistant to Erythromycin, Cephalothin, Neomycin and Lincomycin while the majority of them were susceptible to Trimethoprimsulfamethoxazol (67%), Chloramphenicol(58％), Gentamicin(58%), Ampicillin(17%), Kanamycin(9%) and Tetracycline (9%). 3. In the test of colicinogenecity and congo-red binding capability, 4(33%) isolates produced colicin, all isolates were congo-red negative. 4. The serotypes of isolated E-coli were identified as 008： K- (2 strain), 015： K- (1 strain), 08： K87： K88ab(1 strain), 0139： Kl2(1 strain), 0147: K89(1 strain), others(6 strains ) were autoagglutination.

• 대한수의학회지
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• 제30권4호
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• pp.473-478
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• 1990

This survey was conducted to observe the prevalence of blood parasites in slaughtered cattle included Korean native cattle, Charolias, Hereford, Aberdeenangus and Holstein breeds in the Western area of Kyeongnam. The results obtained are summarized as follows: 1. The prevalence of T sergenti was shown 71.8% as 395 heads of a total of 550 heads examined and from Jaunary to November the monthly prevalence of T sergenti was shown the range of 61.1% to 84% except 38.5% in December. The other blood parasites included Babesia and Anaplasma were not detected from the blood samples except Setaria spp microfilariae. 2. The distribution of parasitaemia levels of T sergenti in positive cattle was shown 93.9% in the range of 1~10/1000 rbc, 4.1% in 11~20, 1.3% in 21~30 and 0.8% above the range of 31. 3. The pervalence of T sergenti by breeds of slaughtered cattle was shown 71.2% in Korean native cattle, 72.7% in Charolias, 78.3% in Hereford and 81. 8% in others (Aberdeen-angus and Holstein) respectively. Also the parasitaemia levels in these cattle were shown higher levels in imported cattle included Charolias, Hereford, Aberdeen-angus and Holstein breeds comparing with Korean native cattle. 4. The prevalence of Setaria spp microfilariae in slaughtered cattle was shown 6.9% and by monthly prevalence of the parasite was shown higher in March, April and May compared with June, July, August and October. But in the winter season included January, February, November and December the parasite was not detected from the blood samples. 5. The distribution of parasitaemia levels of Setaria spp microfilariae per ml of blood was shown 65.8% in the range of 1~50, 13.2% in 51~100 and 10.5% in 101~200 and above the range of 201, respectively.

• 한국동물위생학회지
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• 제28권4호
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• pp.407-412
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• 2005

Ten isolates of Verotoxin-producing Escherichia coli (VTEC) were detected in slaughtered cattle and investigated their phenotypic characteristics and antimicrobial susceptibility. None of the isolates was positive for eae gene. Only one isolate was positive for uidA gene. Eight out of ten isolates of VTEC were originated from broker's cattle. Thus microbiological monitoring for broker farms should be performed to minimize VTEC contamination. In the antimicrobial susceptibility test, all the isolates were highly resistant to bacitracin and lincomycin whilst they are susceptible to apramycin and neomycin.

• 한국동물위생학회지
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• 제32권3호
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• pp.287-292
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• 2009

This study was conducted to analyse risk factors which can influence on blood splash in slaughtered cattle in D slaughterhouse located in Gyeonggi province in 2008. A total of 13,056 cattle were studied by several risk factors such as species, gender, body weight, meat grade, weather (temperature), transport distance, lairaging time, moving time, mixing cattle from different sources. As the result of analysis, the total mean of blood splash was 0.70% and the rate was highest (0.94%) in castrated Hanwoo. The heavier body weight, the higher blood splash rate. The farms which have had more than one experience of blood splash tend to have high grade in meat quality. As a weather factor, the rate in summer season was lower than in winter season. It increased as transport distance getting longer and decreased when the lairaging time was 2~5 hours. We could know many risk factors strongly related with the occurrence of blood splash from this study.

• 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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• 제30권4호
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• pp.507-510
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• 1990

A preliminary survey of Sarcocystis species in the slaughtered cattle in Cheju was undertaken during May through October 1989, using digested diagnostic technique for the heart, the esophagus and the dorsal muscles of the neck specimens digested in 0.5% trypsin solution. The results obtained were summarized as follows. 1. The overall infection rate of Sarcocystis in a total of 218 slaughtered cattle was as high as 36.7% with the highest frequencies in the esophagus muscles(21. 6%), followed by in the dorsal muscles of the neck(19.1%) and in the heart rnuscles(17.9%). 2. Age difference was noticed as 64.3% in the cattle older than five years in comparison with 41.7%, 34.4%, in the group of two to four years and in the group of younger than two years respectively. 3. It was also noticed that the prevalence in the Brahman cross breed was higher(40.0%) than in any other breeds. 4. Regional distribution of Sarcocystis infections was observed as 75.0% in south-east area, 50.0% 44.7%, 35.0%, 32.0% and 20.6% in the areas of Seogwipo city, north-west, south-west, Cheju city and northeast area respectively. 5. According to the type of rearing the infection rate in the ranch type farm was noticed with and in the stock farms(36.2%).

• 한국동물위생학회지
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• 제36권1호
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• pp.31-36
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• 2013

Mycobacterium avium subsp. paratuberculosis is the pathogen of paratuberculosis called Johne's disease. Johne's disease is hardly eliminated because of its long latent period and continuous dissemination, so it is found in ruminants worldwide and can cause substantial economic losses in cattle. It has been reported in many studies on the distribution of Johne's disease in some provinces of Korea that not many, but noticeable numbers of infected cows have been detected since the first detection in 1984. The aims of this study was to investigate the prevalence of Johne's disease obtained from slaughtered cattle in central area of Gyeongnam province, Korea. In this study, the ELISA serum antibody test and PCR were employed on a total of 240 blood and ileac substrate samples from slaughtered cattle in two slaughtering and wholesale centers in Gyeongsangnam-do Livestock Veterinary Research Institute Central Branch. Out of the entire 240 blood samples, three (1.3%) were positive by ELISA, while five (2.1%) were suspected cattle. But ileac substrate samples, eight (3.3%) were positive by PCR. By breeds, positive rates of ELISA and PCR in Korean native cattle were 1.3% and 3.5%, respectively, but no positive cows were found in dairy cattle. By provinces, sero-positive rates of Gyeongnam and Gyeongbuk were 1.6% and 1.3%, respectively. And PCR positive rates of Gyeongnam, Gyeongbuk and other provinces were 2.4%, 5.0% and 2.8%, respectively. These results indicate that it requires the nationwide monitoring test and measure to deal with subclinically infected slaughtering cows.

• 한국동물위생학회지
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• 제18권2호
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• pp.158-162
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• 1995

An abattoir survey was carried out on 300 Korean native cattles reared and slaughtered in North Kyeongnam area to determine the prevalence of Fasciola hepatica infections. The average prevalence of fascioliasis was 46.4% ; the infection rate had a tendency to increase with age. Some hematological and biochemical indices were assayed in Korean native cattle naturally harbouring Fasciola hepatica infection and compared with uninfection control. Affected animal revealed reduction total erythrocyte count and hemoglobin, which was consistent in total leucocyte count and packed cell volume. Infected cattle had lower level of serum total protein and albumin, was consistent serum calcium and glucose indices, had higher levels of SGOT, SGPT and cholesterol indices.

• 대한수의학회지
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• 제14권1호
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• pp.73-76
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• 1974

A basic survey of Echinococcus infection in cattle slaughtered at seogipo abattoir, Jeju Island was carried out. The incidence of hydatid cyst was 0.4% in the native cattle, that is 4 heads out of 993 heads of the slaughtered cattle. The hydatid cysts with or without scolices were found in the liver and lung, and the speciation of them was determined as Echinococcus granulosus granulosus with the morphological and biological characters. The infection rates of bovine echinococcosis were as high as 6.8% to 27.5% from 1936 to 1940 in Jeju cattle, but it has been found greatly decreased to 0.4% in this survey. The main reason of decrease in the incidence was cleared with the fact that wild dogs were abundant at that times.

• 한국동물위생학회지
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• 제21권1호
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• pp.13-20
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• 1998

This survey was carried out to detect the residual antibiotics and sulfonamides in emergency slaughtered cattle(n=265) from slaughter houses in Kyeonggi province by EEC 4-plates method, Charm II and HPLC. The results were summarized as follows ; 1. Antimicrobial substances were detected from 24 samples(9.1%) by EEC 4-plates method and the detection ratio were highest in summer(13.8%). 2. Twenty-two of the 24 positive samples were classified as sulfonamide(34.4%), TCs(31.3%), $\beta$-lactam(23.5%) and aminoglycoside(9.3%) by Charm II test. 13(59.1%) of the 22 samples contained single agent and 9 samples(40.9%) contained 2 or more agents. 3. Oxytetracycline(27.3%), penicillin G (27.3%) and sulfathiazole(18.2%) were detected in 20 from 22 samples by the HPLC and Charm II test. 4. The residual concentration of oxytetracycline, penicillin G and sulfonamide were 0.29~9.30 ppm, 0.05~9.58 ppm and 0.04~7.59 ppm, respectively and 19 samples(7.2%) were exceeded tolerance levels.