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암모니아수(水) 처리가 소콕시디아 오시스트 포자형성(胞子形成)에 미치는 영향(影響)
위성환,강영배,장환,이희수,최상호,Wee, Sung-hwan,Kang, Yung-bai,Jang, Hwan,Lee, Hee-su,Choi, Sang-ho 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.1
Effects of ammonia water on the spornlation of coccidial oocysts collected from bovine feces were studied with particular reference to the various levels of ammonia water (1% to 10%) for 30 minute conservation at room temperature. The sporulation rates showed a negative linear coorelation according to the treatment leavels of ammonia water, 85.3% at 1% level to 8.9% at 10% level. The optimum level of ammonia concentration was regarded as 5% to 10% with more than 80% of sporulation inhibition effect.
위성환,이정길,강영배,강문일,이채용,Wee, Sung-hwan,Lee, Chung-gil,Kang, Yung-bai,Kang, Mun-il,Lee, Chai-yong 대한수의학회 1989 大韓獸醫學會誌 Vol.29 No.1
A survey on the prevalence of internal parasites in the laboratory rats in the Chonnam and Kyunggi areas was carried out. A total of 208 rats was selected for necropsy and the parasites were collected from the organs and the fecal samples. The infection rate of the internal parasites was high as 63.9% and eight species of parasites were identified. Among the species identified A tetraptera(21.6%) and H diminuta(20.7%) appeared with relatively higher infection rates than any other species identified. A significant difference in numbers of parasites was recognized between the regions as 8 species in Chonnam and 4 species in Kyunggi. The laboratory rats reared in stainless steel cage showed the higher infection rate than those in polycarbonate cage, with some exception in H spumosa and H nana. In this survey T crassicauda was firstly in the laboratory rats in Korea.
국내(國內)소의 Eimeria bukidnonensis와 E. wyomingensis의 감염율조사(感染率調査)와 형태학적(形態學的) 특징(特徵)에 관한 연구(硏究)
위성환,강영배,김상희,Wee, Sung-hwan,Kang, Yung-bai,Kim, Sang-hee 대한수의학회 1988 大韓獸醫學會誌 Vol.28 No.1
To determine the prevalence and the morphological identification of two Eimeria species in fecal examinations, a total of 1092 fecal specimens collected during the period of March to December in 1987 was tested by means of flotation technique. The results obtained were summarized as follow: 1. The prevalence of two species was revealed as 1.83% and 0.92% in E. bukidnonensis and E. wyomingensis, respectively. 2. The oocysts of E. bukidnonensis measured in range of $41.3{\mu}m$ to $49.4{\mu}m(mean\;45.5{\pm}1.7){\times}28.8{\mu}m$ to $35.3{\mu}m(mean\;32.2{\pm}1.2)$, and E. wyomingensis $36.9{\mu}m$ to $44.5{\mu}m(mean\;39.8{\pm}1.7){\times}26.5{\mu}m$ to $29.9{\mu}m(mean\;28.2{\pm}0.9)$. 3. The oocysts of E. bukidnonensis appeared darker and more robust than those of E. wyomingensis. 4. The striations in the oocyst wall of E. bukidnonensis were more peculiar than in E. wyomingensis. 5. Among the morphological characteristic, the widths could be reliably taken as a differential point of view for two Eimeria species.
Immunotherapy in calves experimentally infected with cryptosporidium parvm
위성환,주후돈,이정길,김종택,강영배,Wee, Sung-hwan,Joo, Hoo-don,Lee, Chung-gil,Kim, Jong-taek,Kang, Yung-bai The Korean Society of Veterinary Science 1998 大韓獸醫學會誌 Vol.38 No.2
7일령의 송아지 4마리에 실험적으로 크립토스포리디움을 감염시키고 면역혈청, 면역초유 그리고 단크론항체(C6)을 투여하여 이들의 면역요법제로서의 효과를 측정하였다. 크립토스포리디움 감염후 4일째부터 3일간 하루 2회(200~500ml)씩 3종의 면역요법제를 송아지 1마리씩 각각 경구로 투여하였으며, 나머지 한마리의 대조송아지에는 인산 완충액을 경구로 투여하였다. 크립토스포리디움에 감염된 송아지들은 설사를 나타냈는데 대조송아지의 경우 감염후 3일째부터 9일간 설사증상을 나타냈다. 면역혈청, 면역초유 그리고 C6로 치료한 송아지들은 치료후 각각 3일, 2일, 5일째부터 정상에 가까운 분변을 배출하기 시작하였다. 면역혈청과 면역초유로 치료한 송아지들의 경우, 분변으로 배출되는 오시스트의 수가 대조송아지에 비해 현저하게 줄어들었다. 이러한 결과들은 실험에 제공된 면역요법제중 면역초유나 면역혈청이 크립토스포리디움에 감염된 송아지의 설사증상과 오시스트의 배출을 억제하는 효과가 있음을 나타내는 것이다. To determine the efficacy of immunotherapeutic agents, four female Holstein calves 7-day-old were inoculated per os with $1{\times}10^7$ C parvum oocysts (VRI-CN91). Each calf received twice daily oral dosage of 200-500ml of the immune bovine serum, immune bovine colostrum, mAb C6, and phosphate-buffered saline, respectively. Treatment was initiated 4 days postinfection and laster 3 days. The clinical sign of the calf treated with phosphate-buffered saline lasted 9 days after the initial treatment. The calves treated with those immunotherapeutic agents, however, showed decreased severity of diarrhea at day 3, 2, 5 after the initial administration, respectively. The calves treated with immunotherapeutic agents showed reduced parasite loads compared to control calf. These results suggest that oral passive immunotherapy with immune bovine colostrum and immune bovine serum may be a useful treatment approach.
위성환,이정길,강영배,주후돈,주이석,박용호,최상호,Wee, Sung-hwan,Lee, Chung-gil,Kang, Yung-bai,Joo, Hoo-don,Joo, Yi-seok,Park, Yong-ho,Choi, Sang-ho 대한수의학회 1995 大韓獸醫學會誌 Vol.35 No.1
Four Holstein calves 7-day-old were infected with C parvum oocysts for parasitological and pathological investigations of bovine cryptosporidiosis. Of those calf 1 was orally administered with $7{\times}10^6$ oocysts of C parvum isolated from a Korean mouse (VRI-CN91), and calf 2 with same number of C parvum oocysts provided by Washington State University(WSU). The rest (calf 3 and 4) were orally administered with $1{\times}10^8$ oocysts of VRI-CN91 strain. Calf 1 commenced to discharge oocysts in feces at days 6 post inoculation(PI), and it reached a peak $1.4{\times}10^7$ oocysts per gram of feces(OPG) on day 8 PI. Calf 2 commenced to discharge oocysts in feces at day 4 PI, and it reached a peak $3.75{\times}10^6$ OPG on day 7 PI. Calf 3 and 4 commenced to discharge oocysts in feces at day 3 and day 4 PI, and it reached a peak on day 7 PI (calf 3, $7.8{\times}10^6$ OPG; calf 4, $1.7{\times}10^6$ OPG). Clinically, the calves began to show mucoid-watery diarrhea at day 3 to 5 PI, and the sign lasted 5 to 7 days. Calf 2 died on day 9 PI with a severe dehydration. On necropsy the intestine was found to be congested and hemorrhagic. Protozoan oocysts were observed mainly in the ileum and occasionally in jejunum. The results in the present study indicate that the Korean isolate was pathogenic in calves.
축산물가공품에서 건조필름법과 TEMPO<sup>®</sup>TVC 검사법의 총세균수 비교분석
김영조,위성환,윤하정,허은정,박현정,김지호,문진산,Kim, Young-Jo,Wee, Sung-Hwan,Yoon, Ha-Chung,Heo, Eun-Jeong,Park, Hyun-Jeong,Kim, Ji-Ho,Moon, Jin-San 한국식품위생안전성학회 2012 한국식품위생안전성학회지 Vol.27 No.1
본 연구에서는 축산물가공품에서 건조필름법과 $TEMPO^{(R)}$ TVC의 총세균수 측정에 대한 유효성을 평가하였다. 이를 위하여 국내 유통 중인 축산물가공품 257건과 대장균과 황색포도상구균을 인위적으로 접종시킨 축산물가공품 87건에서 대하여 총세균수를 측정하였다. 실험결과는 $log_{10}$ 값으로 전환 후 CCFRA Guideline 29에 의하여 두 검사법간의 일치율을 분석하였고, Pearson의 검정법을 이용하여 상관분석을 실시하였다. 식육가공품 중 햄류, 건조저장육, 분쇄가공육제품 및 식육추출가공품에서 두검사법간 93%이상의 일치율이 확인된 반면 소시지류에서는 89.1%의 일치율을 보였다. 이에 반하여 우유류, 치즈류, 아이스크림류, 조제유류에서는 92% 이상의 일치율을 보였고, 알가열성형제품은 100%의 일치율을 보였다. 또한 소시지류(상관계수 $r$ = 0.77)와 치즈류(상관계수 $r$ = 0.89)를 제외한 축산물가공품 모든 유형에서 건조필름법과 $TEMPO^{(R)}$ TVC 검사법간의 상관계수($r$)가 0.9 이상으로 ($P$ < 0.001) 높은 양의 상관관계를 나타내었다. 결론적으로 본 연구에서 $TEMPO^{(R)}$ TVC는 검출한계가 있는 일부 축산물가공품을 제외하고 총세균수 검사에 있어서 효과적인 것으로 나타났다. We compared between an automated most-probable-number technique $TEMPO^{(R)}$TVC and traditional plating methods $Petrifilm^{TM}$ for estimating populations of total aerobic bacteria in various livestock products. 257 samples randomly selected in local retail stores and 87 samples inoculated with $E.$ $coli$ ATCC 25922, $Staphylococcus$ $aureus$ ATCC 12868 were tested in this study. The degree of agreement was estimated according to the CCFRA (Campden and Chorleywood Food Research Association Group) Guideline 29 and the agreement indicates the difference of two kinds methods is lower than 1 log base 10($log_{10}$). The samples of hams, jerky products, ground meat products, milks, ice creams, infant formulas, and egg heat formed products were showed above 95% in the agreement of methods. In contrast, proportion of agreement on meat extract products, cheeses and sausages were 93.1%, 92.1%, 89.1%, respectively. One press ham and five sausages containing spice and seasoning, two pork cutlets containing spice and bread crumbs, two meat extract product and two natural cheeses and one processing cheese with a high fat content, and one ice cream containing chocolate of all samples showed the discrepancy. Our result suggest that $TEMPO^{(R)}$TVC system is efficient to analyses total aerobic bacteria to compare manual method in time-consuming and laborious process except livestock products having limit of detection.