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경북북부지역 먹는물에서 분리된 대장균군의 항균제 및 염소소독제 감수성
손창규(Chang-kyu Sohn),이춘우(Chun-woo Lee),김태분(Tae-bun Kim),박순길(Soon-geel Park),전찬준(Chan-jun Jeon),이창일(Chang-il Lee),박자영(Ja-young Park),송성복(Sung-bok Song),허완(Wan Huh) 대한환경위생공학회 2008 대한환경위생공학회지 Vol.23 No.2
We examined 165 unchlorinated natural drinking water samples for the presence of E. coli group resistant to antimicrobial agent and chlorine in nothern Gyeongbuk area in 2007. Among 165 water samples, 21 samples(12.7%) were positive to total coliforms and Six genus, 16 strains of E. coli groups isolated from 16 samples showed resistance against more than one antimicrobial agent such as Ampicillin, Tetracycline and Chloroamphenicol. Among 16 strains, 14 strains resistant to Ampicillin, 9 strains resistant to Tetracycline and one strain resistant to Chloroampenicol. but all 16 strains did not contain any integron gene cassettes, which contribute to the spread of antimicrobial resistance alleles by lateral gene transfer of gene cassettes in a variety of enteric bacteria. The minimal inhibitory concentration(MIC) of 14 strains which showed resistant to Ampicillin was between 12㎍/㎖ and 32㎍/㎖, Nine strains resistant to Tetracycline showed between 32㎍/㎖ and 128㎍/㎖ and one strain resistant to Chloroampenicol showed 128㎍/㎖. The chlorine sensitivity of 16 strains isolated from unchlorinated natural water sample didnot show any difference among strains by the concentration of initial free chlorine and elapsed time after chlorine treatment. All 16 strains were killed after 1hr. exposure at 0.2㎎/㎖ of free chlorine per liter or 30minutes exposure at 0.4㎎/㎖ of free chlorine per liter.