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우리나라 가공식품(加工食品)중의 Clostridia perfrigens의 분포(分布)
한왕수,조양자,권종규,서인수,Han, Wang-Soo,Cho, Yang-Ja,Kwon, Chong-Kyu,Suh, Inn-Soo 대한미생물학회 1976 大韓微生物學會誌 Vol.11 No.1
A total of 100 swelled, springered or flippered canned meat and fish products were studied the degree of contamination with clostridias and serological relationships to Hobbs'13 "heat resistant" types, heat resistance of spores and susceptibility of Clostridium perfringens isolates to several antibiotics. Samples examined in this study were collected from Seoul area from June to October, 1975 and prepared in Korea. Clostridias were isolated from 46(46%) of these samples; 19 strains of Cl. perfringens, 9 strains of Cl. oedematiens A, B, 5 strains of Cl. sordelli, each 3 strains of Cl. chauvoei, Cl, oedematiens C.E, and Cl. difficile, 2 strains of Cl. sporogenes. The highest percentage of contamination by Cl. perfringens was found in beef products(26.5%), and the following(5.2%) in mackerel pike and none in baitop shell. whale, manna brand. and top shell. One of 19 isolates of Clostridium perfringens found in meat products was shown to produce heat resistant spores which resist $100^{\circ}C$ for 60 minutes and others were heat labile strains which is killed at $90^{\circ}C$ for 30 minutes. The distribution of Hobbs' serotype of 19 isolates were each 4 strains of type 6, 8, and 11, 1 strain of type 13 and others untypable. 19 Strains of Cl. perfringens were shown a marked susceptibility to cefamezin, lincomycin and minocin and relatively sensitive to vibraimycin, geopen, and chloramphenicol. A marked resistance to kanamycin, colimycin, and gentamycin were shown. Aerobic enteropathogens from samples were not recovered.
안병수,김경희,한왕수,서인수,Ahn, Byung-Soo,Kim, Kyung-Hee,Han, Wang-Soo,Suh, Inn-Soo 대한미생물학회 1987 大韓微生物學會誌 Vol.22 No.2
The incidnce of enterotoxigenic Esherichia coli(ETEC) was investigated in E. coli strains isolated from Korean infants less than two years old. Over a period of 12 months, ETEC strains have been isolated from 45(45.0%) of 100 children with acute diarrhea and from 9(20.5%) of 44 children without diarrhea. In the group with diarrhea, 41(41.0%) strains produced heat-stable toxin, 3(3.1%) produced heat-labile toxin, and 1(1.0%) produced both heat-stable and heat-labile toxins. In the control group, 7(15.9%) released heat-stable toxin, 2(4.5%) released heat-labile toxin and none released both. A statistical association of strains releasing heat-stable toxin was significant(P<0.025).
노승현,김경희,조양자,서인수,Ro, Sung-Hyun,Kim, Kyung-Hee,Cho, Yaug-Ja,Suh, Inn-Soo 대한미생물학회 1987 大韓微生物學會誌 Vol.22 No.2
Colonization factor antigen I(CFA I) has been shown to be one of several virulence factors that promote attachment of enterotoxigenic E. coli(ETEC) to small intestinal epithelial cells of humans. The ability of ETEC to produce mannose-resistant hemagglutination(MRHA) of human blood group A has been used to detect CFA I. To determine gastrointestinal carriage in Korean children of E. coli with MRHA and CFA I, 116 strains of E. coli from diarrheal children admitted to Hanyang University Hospital were examined for MRHA of human erythrocytes and the presence of CFA I. Of 45 ETEC strains, 18(40%) gave a positive MRHA($MRHA^+$) and eight(18%) were positive for CFA I(CFA $I^+$). ETEC with CFA I were all heat-stable enterotoxin(ST) producers and two of these strains were of serogroups $O_{25}$. Of 17 classic enteropathogenic E. coli(EPEC), 7(41%) were $MRHA^+$ but all were negative for CFA I(CFA $I^-$). Of 30 enteroadherent E. coli(EAEC) strains, 11(37%) were $MRHA^+$ and one was CFA $I^+$. Of 24 nonpathogenic E. coli, 4(17%) were $MRHA^+$ but all were CFA $I^-$. It was shown that MRHA was common in all strains of E. coli, CFA I was limited only to ST producing ETEC and EAEC; although MRHA is a useful screening procedure, serologic tests seem to be necessary to comfirm CFA I production. CFA I was associated with a lower proportion of ETEC isolates in Korea than has been reported for other locations.
우리나라 소아 설사에 있어서의 Enteroadherent Escherichia coli의 병원적 역학
김정목,김경희,조양자,서인수,Kim, Jung-Mogg,Kim, Kyung-Hee,Cho, Yaug-Ja,Suh, Inn-Soo 대한미생물학회 1987 大韓微生物學會誌 Vol.22 No.2
Adherence to HEp-2 cells has been proposed as a virulence characteristic of enteropathogenic E. coli (EPEC). The role of the HEp-2 adherent E. coli was evaluated in a group of children with endemic diarrhea admitted to Hanyang University Hospital in Seoul, Korea. HEp-2-adherent E. coli was detected in fecal samples of 59 (59%) of 100 cases and ten (22.7%) of 44 concurrent control children (p<0.0005). Adherence was exhibited by 15 serogroups and subgroups, but within these groups more than one adherence pattern was frequently observed. Of 17 strains belonging to traditional infantile EPEC serogroups, 12(70.6%) gave a positive adherence. Of 45 enterotoxin producing strains, 24 (53.3%) gave a positive adherence. HEp-2-adherent strains that did not belong to classic EPEC serogroups and did not produce heat-stable and/or heat-labile enterotoxins(referred as enteroadherent E. coli, EAEC) was found in 29 (29%) of the patients with diarrhea and in six (13.6%) of the well children (p<0.05). From 22 of the 29 cases, no pathogen other than EAEC was isolated. These findings strongly implicate EAEC as the cause of diarrhea in the children. Our study supports the concept that EAEC may be an important cause of endemic diarrhea in Korean children.