Isolation and characterization of arsenic resistant bacteria from tannery wastes and agricultural soils in Thailand |
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| Authors: | Kitja Chitpirom Ancharida Akaracharanya Somboon Tanasupawat Natchanun Leepipatpibooim Kyoung-Woong Kim |
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| Affiliation: | 1.Inter-department of Environmental Science (IES),Graduate School,Bangkok,Thailand;2.Department of Microbiology, Faculty of Science,Chulalongkorn University,Bangkok,Thailand;3.Faculty of Pharmaceutical Sciences,Chulalongkorn University,Bangkok,Thailand;4.Department of Chemistry, Faculty of Science,Chulalongkorn University,Bangkok,Thailand;5.Department of Environmental Science and Engineering,Gwangju Institute of Science and Technology,Gwangju,Korea |
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| Abstract: | Highly arsenic resistant bacteria (27 isolates), which had a minimum inhibitory concentrations (MICs) for arsenite and arsenate of ? 40 mM and > 400 mM, respectively, were isolated from tannery wastes and agricultural soils collected in Central Thailand. On the basis of the morphological, cultural, physiological and biochemical characteristics, and on the principal ubiquinone component and 16S rRNA gene sequence analyses, they were identified as nine isolates each ofKlebsiella (Groups 1 and 8) andAcinetobacter (Groups 2, 3 and 7), four isolates each ofPseudomonas (Groups 4 and 6) andComamonas (Group 5), and one isolate ofEnterobacter (Group 9). From these 27 isolates, only one isolate, A3-3 from the genusComamonas, appeared potentially capable of oxidizing arsenite to arsenate, as determined by silver nitrate staining of arsenite agar plates after colony growth. |
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