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Prevalence of a Novel Division-Level Bacterial Lineage in Lake Dhanmondi, Dhaka, Bangladesh, as Revealed by Deep Sequencing of 16S rRNA Gene Amplicons

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Abstract

A culture-independent study of the bacterial diversity in Lake Dhanmondi, located in the central region of Dhaka city, Bangladesh, was carried out using deep sequence analysis of 16S rRNA gene PCR amplicons. The results revealed the presence of a group of bacteria, termed LD11, phylogenetically unrelated to any previously cultivated bacteria at the phylum level. LD11 sequences comprised about 1.7 % of the total sequence reads after quality assessment. LD11 appears to constitute a novel division with a deep evolutionary lineage apparently branching between the Chloroflexi and Thermi-Deinococci phyla. Sequence similarity with molecular data from freshwater environments indicates that LD11 represents a widespread and novel clade of freshwater bacteria for which no cultivated representatives are yet available.

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Acknowledgments

This study was supported by grant No. 2007/10063 from The Norwegian Programme for Development, Research and Higher Education (NUFU).

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Correspondence to Nils-Kåre Birkeland.

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Azmuda, N., Rahman, M.Z., Madsen, M.S. et al. Prevalence of a Novel Division-Level Bacterial Lineage in Lake Dhanmondi, Dhaka, Bangladesh, as Revealed by Deep Sequencing of 16S rRNA Gene Amplicons. Curr Microbiol 65, 356–360 (2012). https://doi.org/10.1007/s00284-012-0165-9

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  • DOI: https://doi.org/10.1007/s00284-012-0165-9

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