Journal of Yeungnam Medical Science

Jae Kyu Chung

4 Articles

Transfer of Drugs Resistancy in Staphylococci.: Jae Kyu Chung, Sung Kwang Kim, Hee Sun Kim; Yeungnam Univ J Med. 1987;4(2):15-21. Published online December 31, 1987; DOI: https://doi.org/10.12701/yujm.1987.4.2.15

Study of the Experimental Dermatophyte Infection in Animals.: Jong Soo Choi, Kae Yong Hwang, Ki Hong Kim, Sung Kwang Kim, Jae Kyu Chung, Soon Bong Suh; Yeungnam Univ J Med. 1987;4(1):81-87. Published online August 31, 1987; DOI: https://doi.org/10.12701/yujm.1987.4.1.81

Abstract PDF: Experimental dermatophyte infections are essential for studying dermatophytosis. Induction of standard infections depends on control of three factors-spore dose, scarification, and species of the experimental animals. The authors evaluated the three factors in the experimental infection models, which were inoculated with quantitated spore solution of N.gypsea “+” and A. benhomiae “+” in rabbit, guinea pig, rat, and mouse. The results were as follows. 1. Infection was correlated with concentration of inoculums. 2. In traumatization method, abrasion with knife was the most effective for inoculation, followed by pricking, epilation, and shaving of hair in decreasing order. 3. Rabbit and guinea pig were more susceptible to dermatophyte infection rather than the rat and mouse. However, the mouse was not infected at all. 4. Guinea pig was the proper animal model for experimental dermatophytosis in susceptibility, degree of clinical response, and duration of the infection. 5. A.benhamiae “+” showed more severe inflammation and shorter course the N.gypsea “+”.

Toxic-Shock Syndrome Toxin in Staphylococcus aureus.: Sung Kwang Kim, Jae Kyu Chung; Yeungnam Univ J Med. 1986;3(1):25-31. Published online December 31, 1986; DOI: https://doi.org/10.12701/yujm.1986.3.1.25

Comparative Genetic Characterization of Plasmids of Agrobacterium Species Isolated in Korea.: Jung Hye Kim, Yong Bum Koo, Ki Young Lee, Jae Kyu Chung; Yeungnam Univ J Med. 1984;1(1):41-48. Published online December 31, 1984; DOI: https://doi.org/10.12701/yujm.1984.1.1.41

Abstract PDF: The soil bacterium Agrobacterium tumefaciens is a plant pathogen that causes crown gall tumors by infecting the wounded dicotyledonous plants and subsequent integration of bacterial DNA into plant nuclear DNA. Virulent A. tumefaciens strains harbor a large Ti (tumor–inducing) plasmid that carries genes essential for tumorigenesis. In the present study, 13 strains (Malus pumila Mill; A₁₋₃, Populus monilifera; W₁₋₆, Populus tomentiglandlosa; P₁₋₃ and Rosa species; R₁) of Agrobacterium isolated in korean crown gall tumors and plasmids were observed in 6 strains (W₂, W₃, W₆, P₁, P₃ and A₂). The test for crown gall tumor formation was resulted only in ATCC15955 and KW2 strains inoculated into the stem of sun flower and the development was observed for 4 and 6 weeks after inoculation. Above two Ti plasmids (pTi) were purified by cesium chloride-ethidium bromide density gradient centrifugation and digested with restriction enzyme and fragments of pTiATCC15955 and pTiKW₂ observed by EcoR I ; 25&27, Hind III ; 23&21, BamH I ; each 20 and Hpa I ; 12&27. And sizes of pTiATCC15955 and and pTiKW₂ calculated as 200 and 87 kbases. Octopine was isolated from tumor tissue (W₁₋₆ and P₁₋₃) and these strains confirmed as octopine type.

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