한국수산과학회

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kfas, vol. 54, no. 4, pp.377-387, August, 2021
DOI. https://doi.org/10.5657/KFAS.2021.0377

Antimicrobial Resistance Characteristics of Gram-Negative Bacteria Isolated from Inland Pollution Sources in the Drainage Basin of Iwonmyeon (Taean-gun), South Korea 태안군 이원면 육상오염원 배출수에서 분리한 그람음성균의 항생제 내성 특성

박보미1,3·김민주1 ·정연겸1 ·박진일1 ·유홍식2·오은경1*
1 국립수산과학원 서해수산연구소, 2국립수산과학원 식품위생가공과, 3군산대학교 식품생명공학과

Fecal contamination levels of discharge water from inland pollution sources were investigated in Iwon-myeon (Taean-gun), South Korea. Gram-negative bacteria were isolated during the investigation and the antimicrobial resistance patterns of the isolates were examined to estimate their impact on the coastal environment. The ranges of total coliform and fecal coliform of 12 samples from four major inland pollution sources were 79-490,000 MPN/100 mL and 2.0-490,000 MPN/100 mL, respectively, with the highest level of fecal contamination at Station No. 3. A total of 137 strains (14 genus) were isolated, of which 86 strains (62.8%) were Enterobacteriaceae. The identified isolates were as follows: Pseudomonas spp. (35 strains), Klebsiella spp. (20 strains), Serratia spp. (20 strains), and Escherichia spp. (19 strains). The isolated Gram-negative bacteria showed the highest antimicrobial resistance to ampicillin (81.8%), followed by amoxicillin/clavulanic acid (64.2%), ceftiofur (61.3%), and cefoxitin (59.1%). Antimicrobials in which less than 10% of isolates showed antimicrobial resistance were ciprofloxacin (3.6%) and gentamicin (2.2%). Resistance to one or more antimicrobials was observed in 121 strains (88.3%) and 84 strains (61.3%) showed a tendency for multiple antimicrobial resistance.

Keyword : : Antimicrobial resistance, Gram-negative bacteria, Inland pollution source, Iwon-myeon (Taean-gun), Multiple antimicrobal resistance (MAR)

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