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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.
위성환,이정길,김종택 한국수의공중보건학회 2001 예방수의학회지 Vol.25 No.4
A survey of canine heartworm infections among 175 dogs (Male 97, Female 78) in Chuncheon area was performed from April 2000 to September 2001 using both a modified Knott's test and an antigen test. Of 175 dogs, 45 dogs (25.7%) were infected with the Dirofilaria immitis, as revealed by an antigen-detecting test. Of these, 24 dogs (13.7%) were revealed to have microfilaria in the peripheral blood. The infection rates of heartworm in dogs at the age of 1∼3, 4∼6, 7∼13 years were 16%, 26.8%, and 37.8%, respectively. The difference in the prevalence rates of heartworm infections between the male and female dogs was not statistically signigicant.
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.
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.
전남지방(全南地方) 소의 Buxtonella sulcata 감염실태(感染實態)와 충(蟲)의 형태(形態)
위성환,박영준,이정길,Wee, Seong-hwan,Park, Young-jun,Lee, Chung-gil 대한수의학회 1986 大韓獸醫學會誌 Vol.26 No.1
Samples of feces from 1,080 cattle in Chonnam area were examined for Buxtonella sulcata, Of these, 231 cattle (21.4%) were found to be infected with the ciliate. The incidence was higher in the dairy cattle than in the beef cattle. The cysts of the ciliate are almost spherical or sub-spherical and the mean length of $79.58{\pm}11.76{\mu}m$ corresponds quite closely with the mean width of $77.29{\pm}11.41{\mu}m$. The trophozoite is characterized by the position of the cytostome near the open cytopyge and by the curved groove running down from cytostome to the end of the body. Macronuclei of the cyst and trophozoite were only stained green by MFS solution.
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.