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강완철 ( Wan Choul Kang ),양형석 ( Hyoung Seok Yang ),고진아 ( Jin A Ko ),이두식 ( Du Sik Lee ),손원근 ( Won Geun Son ) 한국동물위생학회 2015 韓國家畜衛生學會誌 Vol.38 No.4
The bacterium causing Johne’s disease (JD), Mycobacterium avium subspecies paratuberculosis (MAP), is distributed worldwide and causes progressive intestinal disease, also known as paratuberculosis, in domestic and exotic ruminants, including cattle. The subclinical form of this disease results in progressive weight loss, reduced milk production, lower slaughter value, and premature culling, with possible impacts on fertility and udder health. Eventually, infection can lead to the clinical form that manifests chronic diarrhea, emaciation, debilitation, and eventual death. JD is a major cause of economic loss in cattle industry. In this study, serological testing was conducted by ELISA to determine the prevalence of MAP in Korean native cattle of Jeju during the duration of 2010 to 2013. A total of 5,150 blood sera were collected in 111 farms and the samples were classified into four different age groups for MAP; group 1 (2 years or less), group 2 (2∼4 years), group 3 (5∼7 years), and group 4 (over 8 years). Overall seroprevalence of MAP was 5.2% (269/5,150), and annually from 2010 to 2013, they were 11.6% (106/915), 2.1% (10/474), 5.5% (89/1,627), and 3.0% (64/2,134), respectively. Also, the prevalence rates was determined by age groups: 48 of group 1 (17.8%), 154 of group 2 (57.3%), 48 of group 3 (17.8%), and 19 of group 4 (7.1%) were seropositive for MAP. Although seropositive samples were found in all age groups, the highest seroprevalence was found in group 2. This study showed that during the investigation the seroprevalence of MAP tended to decrease.
제주지역 돼지에서 Salmonella Typhimurium 항체가 조사
양형석 ( Hyoung Seok Yang ),강완철 ( Wan Choul Kang ),고진아 ( Jin A Ko ),배종희 ( Jong Hee Bae ),김재훈 ( Jae Hoon Kim ) 한국동물위생학회 2015 韓國家畜衛生學會誌 Vol.38 No.2
Porcine salmonellosis is an economically important disease affecting the global pig industry today. Salmonella (S.) Typhimurium is highly contagious and may rapidly spread within pig populations of herd. To investigate the prevalence of porcine salmonellosis in Jeju, a total of 12,885 blood sera of 96 pig farms from 2009 to 2012 were analyzed by microplate agglutination test. Antibodies to S. Typhimurium were detected in all of pig farms tested in Jeju Province, and the mean of seropositive rate of individual pig was 18.8%. The mean seropositive rate of S. Typhimurium in sows (46.7%) was 7 times higher than that of weaned or growing pigs (6.7%). The lowest seropositive rate (3.0%) was detected in 40 day-old pigs, and this result might be closely associated with the marked decrease of maternal passive immunity. The seropositive rate in winter (42.7%) was higher than in other seasons.
제주지역 흑염소에서 뇌염형 리스테리아증 발생 증례 보고
송경옥 ( Kyoung Ok Song ),양형석 ( Hyoung Seok Yang ),정수교 ( Soo Kyo Jung ),강완철 ( Wan Choul Kang ),고진아 ( Jin A Ko ),이철휴 ( Chul Hue Lee ),김재훈 ( Jae Hoon Kim ) 한국가축위생학회 2014 韓國家畜衛生學會誌 Vol.37 No.1
In February 2013, two Korean native goats with circling, dysphagia, sialorrhea, and death were submitted for necropsy to the Jeju Self-Governing Provincial Veterinary Research Institute. Histopathologically,multifocal to confluent micro-abscess composed of neutrophils and macrophages and severe mulifocal perivascular cuffing were observed in pons, medulla oblongata, and cerebellum. Isolated bacteria from the brain sample were Gram-positive coccobacilli and were confirmed as Listeria (L.) monocytogenes by VITEK and PCR analysis. Based on clinical sign, histopathology and bacterial isolation,this case was diagnosed as encephalitic listeriosis. In our best knowledge, this is the first report of encephalitic listeriosis caused by L. monocytogenes in Korean native goats in Jeju.