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도축처리 단계별 도체 및 환경재료에 대한 미생물학적 분석
허정호 ( Jeong Ho Heo ),박영호 ( Yeong Ho Park ),구정현 ( Jeong Hyen Koo ),조명희 ( Myung Hee Cho ),이주홍 ( Joo Hong Lee ),임삼규 ( Sam Kyu Rim ) 한국가축위생학회 1999 韓國家畜衛生學會誌 Vol.21 No.2
To get the information of sanitary develoment of beef and pork, we get the result of environmental specimens(slaughter house floors, sewage, etc) in laboratory. 1. After examination of bacterial infection on after-bleeding, after-dismemberment and final products at each stage of cattle slaughter process, we got log 3.80~7.48cfu/cm2 of aerobic plate counts and log 2.60~5.23cfu/cm2 of coliform counts or so from the carcasses after bleeding, but these count levels went down little bit after dismemberment but as we continued study to the final products, the count levels kept sililar in mumbers. 2. At the slaughter process of pigs, the aerobic plate counts and the coliform counts reached such high levels of log 5.59~8.80cfu/cm2 and log 3.31~5.67cfu/cm2, respectively, after bleeding, in general, these count diminished in a big way after scalding, but they increased just little bit from dismemberment to final products. And there were few differences in the contamination levels on the final products no matter what seasonal contaminations after bleeding. 3. Test revealed very low levels of cell counts both on the aerobic plate counts of washing water and in the coliform counts, the former was log 1.00~2.69cfu/cm2 and the later was log 3.30~5.67cfu/cm2, but the contamination levels on the beds of transfering vehicles for carcasses were very high as followes: the aerobic counts was log 4.23~7.20cfu/cm2 and coliform counts was log 2.86~5.20cfu/cm2 4. Study showed the aeroboc plate counts and the coliform counts get to the highest levels in summer, the second highest one is in fall, the third in spring, lowest in winter. Resulting from the test results proven above we reached this kind of conclusion the bacterial contaminations on eatable carcasses were upto hygienic treatment of carcasses and cleaniness of transferring vehicles at the final stop of slaughter processes rather than upto at any stage of slaughter processes. Therefore we have got to establish alternatives immediately to develo sanitary quality of meat and Pork.
경남 남부지방의 흑염소 사양관리 및 내부기생충 감염실태 조사
허정호 ( Jeong Ho Heo ),정명호 ( Myung Ho Jung ),조명희 ( Myung Heui Cho ),안동원 ( Dong Won Ahn ),이순선 ( Sun Seon Lee ) 한국가축위생학회 1999 韓國家畜衛生學會誌 Vol.22 No.1
Research results on actual management situation of 16 goat farms and internal parasite infection of 155 goats from January to November in 1997 in southern Kyoungnam area were as follows; 1. An average number of goats was 93. Among them, 81 % were farming the goat as avocation with the income rate less then 50%. Eight-four percent of farms terminated the parasites more than twice a year, and the survey showed the black goats had a high digestive and respiratory disease infection rate. 2. The internal parasite infection rate of the black goat was 96.8%, the goats were infected with 13 types of parasites. Of them, Emeria sp was 87.1%, Ostertagia sp 55.5%, Paraphista-num sp 45.8%, and Moniezia expansa 20%, respectively. 3. On the survey of multiple infection rate, both double and triple infection were 19.4%, more than septuple-infection 15,5%, single infection 13.4%, quintuple infection 12.3%, sextuple infection 9.0% and quadruple infection 7.7%, respectively. 4. Look over on seasonal infection rate, higher in fall and lower in winter. Especially, Paramishi-tom sp was higher in summer and winter, both Moniezia expansan and Bonaostom sp were higher in summer. 5. Research on the infection rate of parasites termination period revealed less-than-l-month period had 10-30 infection rate, the infection rate has increased sharply since 3 months passed after the goats were treated with parasite-cid.
유방염에 이환된 젖소에 있어서 혈액 동태학에 관한 연구
허정호 ( Jung Ho Heo ),손성기 ( Sung Gi Son ),이주홍 ( Ju-hong Lee ),김종수 ( Jong Shu Kim ) 한국가축위생학회 1995 韓國家畜衛生學會誌 Vol.18 No.2
Hemodynamic values were assessed in cows with naturally mastatis. hemodynamic tests included WBC, RBC, PCV, Hemoglobin, Monocyte, Eosinophil, Neutrophil, Lymphocyte, and prothrombin time, activated partial thromboplastin time, thrombin time, fibrinogen, platelet, antithrombin-Ⅲ, and plasminogen activities. Significant changes were observed in the mean values of most analytses: WBC, monocytes, eosinophil, neutrophil were increased and lymphocyte were decreased. prothrombin time was increased: activated partial thromboplastin time, thrombin time. Increased: activated partial thromboplastin time, thrombin time, fibrinogen concentration, plasminogen activity and platelet concentration were decreased; and RBC, PCV, hemoglobin and antithrombin-Ⅲ activity were unchanged, compared with normal mean values. Thesse data indicated activation of hemodynamic mechanisms, initiated either directly by bacteria produced endotoxin of secondaly inflammatory mediators produced in response to caused bacteria and naturally acquired mastitis was very similar to the experimental endotoxin-induced mastitis.
경남 남부지방에서 사육 중인 송아지의 설사병에 관한 역학적 연구
허정호 ( Jung Ho Heo ),조명희 ( Myung Heui Cho ),이국천 ( Kuk Cheon Lee ),박미남 ( Mi Nam Park ),조은정 ( Eun Jeong Cho ),최만수 ( Man Su Choi ),김충희 ( Chung Hui Kim ),강정부 ( Joung Boo Kang ),김의경 ( Eui Kyung Kim ),김종수 ( 한국가축위생학회 2008 韓國家畜衛生學會誌 Vol.31 No.3
The present study was conducted to investigate the epidemiological characteristics such as isolation rate and antimicrobial drug susceptibility of etiological agents. The specimens (stool or intestine) were collected from 319 calves with clinical diarrhea from 195 farms in Gyeongnam south area (Gosung, Tongyung, Hadong) from June 2005 to August 2006. The isolation rate of Salmonella spp was higher in summer (8.4%) than in winter (4.8%) and the average was 7.2% (23/319 head). Some of Salmonella spp isolated were resistant to penicillin, oxytetracycline, tetracycline, and cephalexin (>90%), but some of them were suscep-tible to norfloxacin, ciprofloxacin, sulfamethoxazole/trimethoprim and amikacin(>30%). There was no statistical difference in the isolation rate of Eimeria spp between summer(48.9%) and winter(42.3%). For the evaluation of infection level of Eimeria spp oocyst per gram of feces(OPG) was examined, and severe, moderate and light infection level were 11.9%, 12.5% and 22.3%, respectively. In the isolation rates of Eimeria spp the calves under 19 days was lowerthan those over 60 days, but there was not different among herd size.
만성 B형 간염 바이러스 감염자에서 혈청 HBV DNA 양과 간조직 소견의 관련성
허정호 ( Heo Jeong Ho ),허정 ( Heo Jeong ),권대식 ( Kwon Dae Sig ),문재현 ( Mun Jae Hyeon ),김광하 ( Kim Gwang Ha ),강대환 ( Kang Dae Hwan ),송근암 ( Song Geun Am ),조몽 ( Jo Mong ),양웅석 ( Yang Ung Seog ) 대한소화기학회 2003 대한소화기학회지 Vol.42 No.3
Background/Aims: Serum HBV DNA levels are correlated with hepatic histologic activity in chronic HBV infection based on HBeAg. Liver injury may persist, even though HBV DNA are not detected by hybridization assay. This study was to investigate whether serum HBV DNA levels determined by more sensitive quantitative method are correlated with histologic activities in chronic HBV infections. Methods: This study included 66 chronic HBV infected patients. HBV DNA level was quantified by Cobas Amplicor HBV MonitorTM. Results: Serum HBV DNA levels in HBeAg-positive patients were significantly higher than HBeAg-negative patients. In HBeAg-positive patients, serum HBV DNA levels showed a significant negative correlation with portal-periportal activity and fibrosis (r=-0.451, -0.446 respectively). AST levels were correlated with lobular, portal-periportal activity and fibrosis (r=0.432, 0.365, 0.301 respectively), whereas ALT levels were related to lobular activity (r=0.294). Elevated AST levels predicted lobular activity, portal-periportal activity, and fibrosis with moderate to severe degree (OR 1.733, 95% CI 1.083-2.775; OR 1.518, 95% 1.028-2.243, p=0.336; OR 17.897, 95% CI 1.517- 211.208, p=0.022, respectively). Conclusions: In HBeAg-positive patients, serum HBV DNA level correlates inversely with histologic activity. On the other hands AST level correlates with histologic activity and the stage of moderate or severe degree. (Korean J Gastroenterol 2003;42:220-225)
허정호 ( Jung Ho Heo ),이국천 ( Kuk Cheon Lee ),조명희 ( Myung Heui Cho ),김국헌 ( Kuk Hun Kim ),하대식 ( Dae Sik Hah ),김종수 ( Jong Shu Kim ) 한국가축위생학회 2006 韓國家畜衛生學會誌 Vol.29 No.3
To investigate serum antibody titers of Newcastle disease(ND) virus, serum samples were collected from 19,774 slaughtered chickens from 862 farms in Geoje, Goseong, Tongyung and other province during the period from January 2001 to December 2005. The results obtained are summarized as follows; 1. The negative percentage of ND antibody titer with below 1.0 levels decreased from 46.7% in 2001 to 40.5% in 2004 but those of it increased to 47.0% in 2005 and the positive percentage of ND antibody titer with higher 5 levels increased from 15.8% in 2001 to 26.2% in 2005. 2. The season levels of ND antibody titer showed various levels according to seasons but the general trend of ND antibody titer decreased in the later half of the year than those of the first half of the year. 3. The negative percentage of ND antibody titer on provinces decreased from 52.0%(2001) to 36.2%(2004) in Goseong but those of it increased to 51.4% in 2005. The negative percentage of ND antibody titer of Tongyung and other provinces increased from 51.0%, 28.5%(2001) to 55.0% and 44.3%(2005), respectively. 4. The year average levels of ND antibody titer increased from 2.2 to 2.6 during 2001-2004 but those of it decreased to 2.4 in 2005. The provinces average levels of ND antibody titer increased from 2.0 to 2.8 during 2001-2005 and others provinces except Gyeongnam decreased from 3.3 to 2.6 during the 2001-2005. 5. The farm average levels of ND antibody titer with below 1.0 levels decreased from 26.3% in 2001 to 10.2% in 2004 but those of it increased to 17.6% in 2005 and those of below 1.0 or 2.0 levels increased from 17.9%(2001) to 27.7%(2005). The protective levels of ND antibody titer with higher 5.0 levels increased from 2.1% in 2001 to 8.8% in 2005.
항구포자충제제의 사용 여부에 따른 구포자충 감염실태 조사
허정호 ( Jung Ho Heo ),정명호 ( Myung Ho Jung ),김국헌 ( Kuk Hun Kim ),조명희 ( Myung Heui Cho ),이국천 ( Kuk Cheon Lee ),서종립 ( Jong Lip Seo ),김충희 ( Chung Hui Kim ),하대식 ( Dae Sik Hah ),류재두 ( Jae Doo Ryu ),김곤섭 ( Gon 한국가축위생학회 2005 韓國家畜衛生學會誌 Vol.28 No.3
The present study was conducted to investigate the prevalence of Eimeria infection according to anti-coccidiosis drugs treatment in 1,300 slaughtered chickens from 130 farms in Gyeongnam, Jeonnam, Jeonbuk, Gyeongbuk and Chungnam during the period from October 2002 to August 2003. The prevalence of Eimeria infection by drug administration for treatment and prevention or non-administration was shown 71.4%, 82.6% and 72.3%, respectively, and so infection rate of chicken farms was similar independent on drug administration or not. The prevalence of Oocysts infection level of chicken farms by administrated drug for treatment was shown lower (25.3%) than for prevention (35.4%) and non-treatment (36.2%). The prevalence of Oocysts infection level by drug administration under 2 days for treatment was shown higher infection rate (32.2%) than over 3 days (20%) and also under 2 days for prevention has similar tendency of that of treatment and so, it was conclusion that administration of drug over 3 days has the effect for treatment and prevention of Eimeria infection. The prevalence of Oocysts infection level by age for prevention has various level from 48.8% to 22.9% but on 22~25 days was shown the most higher ratio (48.8%) and on 19∼21 days was shown the lowest rate (22.9%) among the all age groups.
경남 남부지방에서 송아지설사병 원인체 바이러스 검출 조사
허정호 ( Jung Ho Heo ),조명희 ( Myung Heui Cho ),이국천 ( Kuk Cheon Lee ),박미남 ( Mi Nam Park ),조은정 ( Eun Jeong Cho ),최만수 ( Man Su Choi ),김충희 ( Chung Hui Kim ),강정부 ( Joung Boo Kang ),김의경 ( Eui Kyung Kim ),김종수 ( 한국가축위생학회 2008 韓國家畜衛生學會誌 Vol.31 No.3
Among calves` diseases, digestive diseases most frequently occur in Korea, and especially viral diarrhea is one of the most important diseases. This study was conducted to get some basic information for the control of the viral diarrhea in calves. The samples were obtained from 319 calves with clinical diarrhea from 195 farms in Gyeongnam south area (Gosung, Tongyung, Hadong) from June 2005 to August 2006. Viral detection was examined by polymerase chain reaction (PCR). Etiological viruses were detected from 171(53.6%) of 319 calves, and bovine rotavirus (BRV) were 130 (40.8%) and bovine viral diarrhea virus (BVDV) 41 (12.9%), and no coronavirus was confirmed. Statistical difference was found in BRV detection between summer (32.6%) and winter (57.7%). However there was no seasonal difference in BVDV. In detection rate of the calves under 19days, BRV was highest (55.1%), but BVDV lowest (5.1%). No big difference was in rate among herd size. However, BRV was lowest (26.8%) in the group over 51 heads, but BVDV was highest (19.5%) in the same.
Dynamic Electrochemical Impedance Spectroscopy를 이용한 스테인리스 강의 계면 저항 분석
허정호 ( Jung Ho Heo ),이용헌 ( Yong Heon Lee ),신헌철 ( Heon Cheol Shin ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.10
The passivation (or deactivation) of a metal surface during oxide film formation has been quantitatively explored for a ferritic stainless steel by using dynamic electrochemical impedance spectroscopy (DEIS). For this purpose, the electrochemical impedance spectra were carefully examined as a function of applied potential in the active nose region of the potentiodynamic polarization curve, to separate the charge transfer resistance and oxide film resistance. From the discrepancy in the potential dependence between the experimental charge transfer resistance and the semi-empirically expected one, the degree of passivation could be quantitatively estimated. The sensitivity of passivation of the steel surface to anodic potential, which might be the measure of the quality of the oxide film formed under unit driving force or over-potential, decreased by 31% when 3.5 wt% NaCl was added to a 5 wt% H2SO4 solution.