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장영부 ( Young Boo Jang ),김평희 ( Ryung Hee Kim ),김재명 ( Jae Myung Kim ),정석찬 ( Suk Chan Jung ),구복경 ( Bok Kyung Ku ) 한국수의공중보건학회 2010 예방수의학회지 Vol.34 No.4
Nontuberculous mycobacteria (NTM) often confounds the interpretation of skin test in tuberculosis diagnosis, resulting in false-positive reaction. And, NTM are emerging pathogens that cause opportunistic infections in both humans and animals. The prevalence of NTM on human disease has been well investigated, whereas that of NTM on animal disease is not well established in Korea. The aim of this study was to determine the prevalence of NTM on cattle, which did not have symptoms of tuberculosis disease. A total of 426 isolates were collected in Korean native cattle and dairy cattle from 2007 to 2010. The most frequently isolated organisms were Mycobacterium peregrimum (n=5, 28%), Mycobacterium fortuitum (n=3, 17%), Mycobacterium intracellulare (n=2, 11%), Mycobacterium phlei (n=1, 5.6%), Mycobacterium terrae (n=1, 5.6%), Mycobacterium llatzerense (n=1, 5.6%), and Norcadia spp. (n=1, 5.6%). It seems to be necessary to further study the prevalence of NTM on environment (water, soil, feces) as well as animals.
Multiplex PCR을 이용한 Mycobacterium bovis와 Mycobacterium tuberculosis의 동정
장영부 ( Young Boo Jang ),김재명 ( Jae Myung Kim ),최재영 ( Jae Yeong Choe ),이햇님 ( Haet Nim Lee ),정석찬 ( Suk Chan Jung ),박영길 ( Young Kil Park ),구복경 ( Bok Kyung Ku ) 한국예방수의학회(구 한국수의공중보건학회) 2011 예방수의학회지 Vol.35 No.4
Tuberculosis (TB) is a significant disease for both humans and animals worldwide. The genus Mycobacterium includes several species that cause TB disease in humans and other animals. Amongst the members of the Mycobacterium tuberculosis complex (MTC), M. tuberculosis is mainly a human pathogen, whereas M. bovis has a broad host range and is the principal agent responsible for TB in domestic and wild mammals. M. bovis also infects humans, causing zoonotic TB through ingestion, inhalation. M. bovis accounts for only a small percentage of the reported cases of TB in humans. In recent years, TB in farmed deer has become a disease as public health importance in several countries. Nowadays, there has been rapid outbreak of bovine TB in cattle and deer in Korea. Investigations are needed to elucidate the relative importance of M. bovis on TB incidence in humans, especially in Korea where bovine TB remains a problem. Also, the human sources as the cause of animal infection, M. tuberculosis from the farm workers also important for TB control of animals in Korea. Differentiation between the causative organisms may only be achieved by sophisticated laboratory methods involving bacteriological characteristics, biochemical properties, and routine resistance to pyrazinamide (PZA). M. bovis shows inherently resistant to PZA whereas M. tuberculosis is susceptible to PZA. In this study, we developed a multiplex-PCR assay based on a 12.7-kb fragment for the differential detection of M. bovis and M. tuberculosis. A total of 131 M. tuberculosis complex isolates were randomly obtained from cattle and deers that were PPD positive. they all yielded M. bovis. M. tuberculosis was not isolated from animals. and, a total of 25 M. tuberculosis complex isolates which is resistant to PZA were obtained from patient. PZA resistant MTC in humans was caused entirely by M. tuberculosis. The multiplex-PCR protocol was highly species-specific and time saving for identification of M. bovis and M. tuberculosis. This multiplex-PCR assay will be easily used as a routine monitoring tool in veterinary and medical laboratories.
어육 단백질 회수를 위한 알칼리 Pilot 공정과 회수 단백질의 특성
장영부(Young-Boo Jang),김근배(Gun-Bae Kim),이근우(Keun Woo Lee),최영준(Yeung Joon Choi) 한국식품영양과학회 2006 한국식품영양과학회지 Vol.35 No.8
Pilot 공정으로 회수한 어육 단백질의 회수율은 전어체와 마쇄육에 대하여 각각 33.2%와 61.8%였다. 균질화 속도와 시간은 3,000 rpm에서 5분이 가장 적당하였으며, 용해 단백질의 회수는 4,000 rpm 이상, 침전 단백질의 회수는 2,000 rpm 이상의 원심속도가 적당하였다. pH 조절제로서 citric acid, sodium phosphate(tribasic) 및 calcium oxide는 pH 조절 효과는 있으나, 회수단백질 가열 젤의 물성을 현저히 감소시켰다. 알칼리 pilot 공정으로 회수한 단백질 가열 젤의 파괴강도와 변형 값은 수세 공정으로 회수한 단백질의 가열젤에 비하여 우수하였고, 소금, 전분 및 소혈청 단백질의 첨가는 파괴강도와 변형 값을 감소시켰다. 백색도는 수세 공정으로 회수한 단백질에 비하여 낮았다. 알칼리 처리에 의한 어육 단백질의 회수 공정은 수세공정에 비하여 폐수의 오염부하량을 현저히 감소시켰다. 이 같은 결과는 어육 단백질회수를 위해 산업적 규모로 알칼리 공정을 적용할 수 있으며, 특히 수산 가공품의 중간 소재로 활용하기 위한 적색육 및 냉동 어육 단백질의 회수에 적절할 것으로 판단하였다. Optimum operation condition for pilot scale of alkaline processing for fish muscle was investigated by measuring protein solubility, yield, texture, and water?holding capacity. Recovered protein yield was 33.2% for whole fish and 61.8% for minced muscle. Optimum homogenized speed and time, using industrial scale homogenizer, were 3,000 rpm and 5 min, respectively. Limited centrifugal force of continuous cylinder type was 4,000 rpm for recovering soluble protein, and 2,000 rpm for recovering precipitated proteins. The pH control agents such as citric acid, sodium phosphate and calcium oxide decreased the breaking force and deformation of recovered protein gel. The breaking force and deformation of the recovered proteins were high compared to conventional surimi. The breaking force and deformation were decreased by addition of salt, starch and bovine plasma proteins. Whiteness of recovered protein gel was lower than that of conventional surimi. Alkaline processing greatly decreased nitrogen content and chemical oxygen demand in waste water. The results suggest that alkaline processing has a potential as industrial production for recovering the proteins from fish muscle.
Streptomyces thermocarboxydus C12에서 Subtilisin-like Protease Inhibitor 생산을 위한 최적배양조건
강성일(Sung-Il Kang),장영부(Young-Boo Jang),최경임(Gyeonglim Choi),최병대(Byeong-Dae Choi),공재열(Jai-Yul Kong),최영준(Yeung-Joon Choi) 한국식품영양과학회 2008 한국식품영양과학회지 Vol.37 No.3
광양만의 해안 뻘에서 protease 저해력이 우수한 균주 S. thermocarboxydus C12를 분리하여 최적의 저해제 생산 조건을 조사하였다. 최대 저해활성을 보이는 온도와 초기 pH는 각각 40℃와 8.0이었다. 저해제 생산에 미치는 탄소원의 영향을 검토한 결과, 단당류인 galactose, glucose, fructose와 다당류인 starch에서 높은 저해활성을 보였으며, 최적의 탄소원과 농도는 각각 galactose와 1.6%(w/v)였다. 질소원의 경우 복합배지인 polypeptone과 proteose peptone에서 가장 높은 저해활성이 나타났으며, 최적의 농도와 질소원은 0.5%(w/v)와 proteose peptone이었다. 최적의 NaCl 농도와 금속이온은 각각 1%(w/v)와 1 mM LiCl이었다. 선정된 최적배양조건에서 균주를 배양한 결과, 84시간 동안 배양 시저해활성이 최대인 것으로 나타났다. The objective of this paper was to investigate optimal culture conditions for the production of an inhibitor against subtilisin-like protease from Streptomyces thermocarboxydus (S. thermocarboxydus) C12 isolated from sediments of Gwangyang coast. The optimal temperature and initial pH for the production of subtilisin-like protease inhibitor were 40℃ and pH 8.0, respectively. Inhibition activities were high for galactose, glucose and fructose. The best carbon source and its concentration were galactose and 1.6% (w/v), respectively. Inhibition activities were also high in medium containing polypeptone, proteose and peptone. Optimal nitrogen source and concentration were protease peptone and 0.5% (w/v), respectively. Optimal concentrations for inhibitor production were 1% (w/v) for NaCl and 1 mM LiCl for metal salts. The subtilisin-like protease inhibitor from S. thermocarboxydus C12 showed a maximum inhibitor activity after cultivation for 84 h under the optimized medium.