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Coagglutination에 의한 $\beta$-용혈성 연쇄구균의 혈청군 동정
정윤섭,윤양숙,김윤정,이삼열,김성광,이병수,김주덕,Chong, Yun-Sop,Yoon, Yang-Sook,Kim, Yoon-Chung,Lee, Sam-Uel Y.,Kim, Sung-Kwang,Lee, Byung-Soo,Kim, Joo-Deuk 대한미생물학회 1979 大韓微生物學會誌 Vol.14 No.1
Identification of group A $\beta$-phemolytic streptococci is very important to provide an appropriate preventive measure of possible rheumatic fever and acute glomerulonephritis. For such purpose bacitracin susceptibility of streptococci because of its simplity has been most widely used despite of its occasional faulty results. Recently, a coagglutination technique was advocated using streptococcal group specific antibodies adsorbed to protein A-containing staphylococci. This study was conducted to evaluate the coagglutination technique using reagents prepared by ourselves. The specificity, reproducibility and stability were ascertained and the following results were obtained. 1. The identification by coagglutination technique using our own reagent gave the same results compared with the Lancefield precipitation technique. The result also agreed with the Phadebact grouping. 2. There were no variation in group A and B identification due to lot difference. However, there were a few discrepant results in group C and G identification which was conducted in different days with different lots of our reagent. 3. The stability of our reagents was less satisfactory compared to the commercial product. An effort to improve the stability was considered necessary. 4. For coagglutination, it was found convenient to use supernatant of Todd-Hewitt broth incubated for 24 hours. Both parafin-ringed slide glass and RPR card gave comparable results and the former could be used when the latter is not available.
Ampicillin과 Chloramphenicol 내성 Salmonella typhimurium 분리의 증가
정윤섭,한상순,권오헌,이삼열,정태화,Chong, Yun-Sop,Han, Sang-Soon,Kwon, Oh-Hun,Lee, Samuel.Y.,Jung, Tae-Hwoa 대한미생물학회 1987 大韓微生物學會誌 Vol.22 No.1
Salmonella typhi infection, which was the most frequent enteric infection in Korea, has been decreasing, while the infection of other serogroups of Salmonella has been increasing since the later part of 1970s. In 1986, the number of serogroup B isolated by us increased to 46, which corresponds 21.1% of all enteropathogenic bacteria isolated from stool specimens. Salmonella isolates resistant to antimicrobial agents were extremly rare in Korea, in the 1970s. However, 7 of 13 serogroup B isolates showed resistance to ampicillin or to chloramphenicol in 1984. Among the serogroup B isolates in 1986, 71.7% and 69.6% were resistant to ampicillin and to chloramphenicol respectively. The minimum inhibitory concentrations of ampicillin and chloramphenicol against these isolates were >$128\;{\mu}g/ml$ and $128\;{\mu}g/ml$ respectively.
장티푸스 진단에 있어서 Vi - 간접형광항체법의 유용성
김준명(June Myeong Kim),김응(Eung Kim),홍천수(Chein Soo Hong),정윤섭(Yun Sop Chong),박기일(Ki Il Park) 대한내과학회 1987 대한내과학회지 Vol.33 No.6
N/A Although the confirmative diagnosis of typhoid fever is by culture of the causative organism usually from body fluids, serological test can be helpful in providing a more rapid method of diagnosis. The indirect fluorescent antibody test using a Salmonella typhi Vi-antigen and a FITC-conjugated rabbit anti-human polyvalent immunoglobulins has been evaluated for the diagnosis of typhoid fever. The results obtained were as follows: 1) Only two of 61 sera from culture proved typhoid fever patients were falsely negative. Of 79 sera from patients with febrile diseases other than typhoid fever only one had falsely positive titer. Forty sera from normal subjects were all negative. The sensitivity and specificity were 96.7% and 99.2% respectively. 2) The positive rate of the test was 71.4% within the 1st week, 90.0% from the 1st week to 2nd week, and 100% since the 2nd week after fever onset. 3) The antibody titer to Vi-antigen was already increased within the 1st week after fever onset. And the titer showed its maximum response in the 2nd and 3rd week and was gradually decreased to near normal level throughout this study. In conclusion, the Vi-indirect fluorescent antibody test (Vi-IFAT) could serve as an useful serologic test for the diagnosis of typhoid fever.