Diversity of bacteria and mycobacteria in biofilms of two urban drinking water distribution systems

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Abstract:

In this study, to give insight into the bacterial diversity of biofilms from full-scale drinking water distribution systems (DWDSs), the bacterial community compositions of biofilms from two urban DWDSs (Guangzhou and Beijing, China) were determined using a 16S rRNA gene library technique. Meanwhile, the occurrence and diversity of mycobacteria were also analyzed by a Mycobacterium-specific hsp gene assay. The biofilms from the full-scale DWDSs have complex bacterial populations. Proteobacteria was the common and predominant group in all biofilm samples, in agreement with previous reports. The community structures of bacteria at the three sites in Guangzhou DWDS were significantly different, despite the similar physicochemical properties of portable water. Some abundant and peculiar bacterial phylotypes were noteworthy, including Methylophilus, Massilia, and Planomicrobium, members of which are rarely found in DWDSs and their roles in DWDS biofilms are still unclear. The diversity of Mycobacterium species in biofilm samples was rather low. Mycobacterium arupense and Mycobacterium gordonae were the primary Mycobacterium species in Guangzhou and Beijing biofilms, respectively, indicating that M. arupense may be more resistant to chloride than M. gordonae.

Keywords: bacterial diversity; biofilm; diversité bactérienne; drinking water distribution systems; mycobacteria; mycobactéries; système de distribution d’eau potable

Document Type: Research Article

DOI: http://dx.doi.org/10.1139/w11-129

Affiliations: 1: College of Environmental and Resource Sciences, Graduate University of Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China. 2: Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, People’s Republic of China.

Publication date: March 27, 2012

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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