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KMID : 1156220190450030222
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Journal of Environmental Health Sciences
2019 Volume.45 No. 3 p.222 ~ p.230
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A Study of Antibiotic Resistance of Enterococci Isolated from Recycling Water of Floor Fountains in Gwangju Area
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Kim Yeon-Hee
Song Hyeong-Myeong
Choi Yeongg-Seop
Lee Yoon-Kook
Park Jin-Hwan
Kim Sun-Jung
Kim Ha-Ram
Kang Yu-Mi
Bae Seok-Jin
Cho Young-Kwan
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Abstract
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Objectives: This study aims to evaluate water quality in terms of microorganisms and identify the antibiotic resistance of Enterococci isolated from the recycling water in floor fountains at three parks and one reservoir in the Gwangju area.
Methods: Water samples were analyzed for Enterococci using membrane Enterococcus indoxyl β d glucoside agar (mEI) as described in USEPA Method 1600. The vancomycin-resistant Enterococci with VanA and VanB were identified by PCR. An examination of the antibiotic resistance of isolates against 14 antibiotics was performed by the disk diffusion method.
Results: The drinking water quality criterion was exceeded for total colony counts in 68% of all recycling water samples. The average concentration of total califorms and fecal coliforms was 139,325 and 413 CFU/100 mL, respectively. VanA and VanB were not detected from the isolates. We found the antibiotic resistant Enterococci strains to be E. faecalis, E. faecium, E. durans, E. mundtii, E. hirae, and E. thailandicus. The isolates were resistant to Rifampin (50%), Erythromycin (25.8%), Tetracycline (10.2%), Nitrofurantoin (8.1%), Minocycline (3.1%), Erythromycin (1.2%), Penicillin (0.7%), Norfloxacin (0.5%), and Teicoplanin (0.5%) among the 14 antibiotics tested. Antibiotic resistance tests for Enterococci from the recycling water of floor fountains resulted in 30.2% showing resistance to two or more antibiotics.
Conclusions: These results showed that the multi-antibiotic resistance of Enterococci, E. coli, and others should be investigated continuously in each environment field.
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KEYWORD
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Enterococci, antibiotic resistance, floor fountains, VanA, VanB
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